Eighth General Assembly of the ILRSOctober 11, 2002

Washington, D.C.

Presentation Material

Introductory Remarks

Science Coordinator Report

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The WPLTN meeting_Report to General Assembly11 October 2002

1. Matter of regret: Missing China and Russia delegatesWPLTN express the matter of regret for missing Chinese and Russia delegates by visa problemnot only because we lost more than 2/3 people attendance of WPLTN network in the workshopbut also we lost rare opportunity to exchange information for many solved-for problems throughface-to-face communication in the week.

2. National Report Briefing Australia: National Mapping Division of Geoscience Australia keeps running Yaragadee andMt.Stromlo as the highest productivity and quality stations in ILRS network. EOS uses 10% ofMt.Stromlo time for research and development including such as LLR and debris observationusing extremely high power laser.Japan: See attached report.China: See attached reportSaudi: Successful re-commission of SALRO data yield since 2001(see attached report and figures by courtesy of KACST)Russia: No report in this meetingIndia: ISRO is trying to acquire station for associated space program

3. Overall Strategic issuesAs shown statistics in CB report for last years, there has been more stations coming to high rankfrom data yield point of view. However, number of stations needs more effort for quality of theirproducing data. Each country (with no exception i.e., including Australia) has own fundingproblems to face on how to continue stations and operation, and how to upgrade the observationcapability. Some of stations should be maintained/upgraded as core stations strategically inWPLTN region.

4. Other actionsTo improve communication with CB for lack of information regarding sitelog etc.New executives installed as attached sheet.

Japanese Network

CRL: Two stations Miura, Tateyama of four Keystone stations were dismantled in 2001. Laserand electronics of those stations are moved and integrated to Koganei 1.5m telescope fortracking campaign LRE and ADEOS2.HOD (Hydrographic and Oceanographic Department of Japan Coast Guard): Simosato hasbeen better routine observation than last few years. It will achieve in this month 15,000 passessince station built. HTLRS ceased its operation entirely in 2002.NASDA: GUTS SLR system is in final integration phase waiting telescope to perform co-locationtest at GSFC

Report from China

1. ObservationsChangchun, Shanghai, Beijing, and Kunming stations are operational, while Wuhan is doingsome tests and will restart observing soon. The mobile system TROS has been in Wuhan formaintenance and rest, and is going to Urumqi for collocation with the VLBI system in thebeginning of next year. Another mobile system CTLRS has been in Xian for upgrading of thecontrol system and laser system, and is doing some testing satellite observations.

2. System upgradesThe Changchun station adopted the new computer control system as the Shanghai station had.The Shanghai station has upgraded the system control and diagnosis software. The newobservation house for SLR was started to build and will be completed in March 2003.Shanghai station is developing a Raman laser in collaboration with K. Hamal and I. Prochazka ofthe Czech Technical University and J. Gaignebet of CERGA for the new SLR station.

3. Argentina systemThe system is doing ground target ranging and is testing satellite tracking. It is shown that themount and servo system are working well. It is expected to have satellite returns soon.

WPLTN Executive Meeting

Date:TBD (May-June, 2003),3 days.Venue: Shanghai Observatory,Shanghai, ChinaParticipant: WPLTN ExecutivemembersTopics: How to upgrade theobservation capability ofWPLTN stations

SALRO 2001 Report

The SALRO site at the Solar Village,Saudi Arabia. The Solar Village issome 45 km north west of Riyadh.

Photography date is July 9, 2002,whilst tracking the Etalon2 satelliteafter dusk.

The site has many shrubs andhedges, giving it the feel of an oasisin the desert.

The site is operated primarily duringdaylight and early evening hours.

Re-Commissioning in 2000KACST let an O&M contract in mid 2000 with the aim of making SALRO work again, after it satunused for some time. Several months were spent in 2000 making all equipment operational.

Spares from the defunct Orroral Observatory and CRL 1.5m SLR system were used in this effort,and thanks go to those organizations for their assistance.

By the end of 2000, SALRO was capable of successful SLR to satellites in all orbit categories,except the very lowest – limitations of the mechanical transmit/receive system which remains.

While the entire system received attention to varying degrees, it was the laser, receiver andpulse-handling electronics that required the most work. The acquisition software had previouslybeen upgraded by EOS to deal with the Y2K problems.The team consists of two KACST staff trainees and two expatriate engineers working under theO&M contract.

Operations Commence 1/1/2001With all the gross problems cleared, use of the system commenced on a production basis. Operational procedures were developed in tandem with fine tuning of the system. Staff trainingassumed a higher priority. One observations shift operated all year.

2001 was a transitional year, commencing as “engineering” and ending by achieving compliancewith all the ILRS guidelines.

Some periods of downtime exceeding one week were required to overcome random failures, andimplement major improvements such as the installation of a new compensated SPAD detector.The incidence of failures and unscheduled downtime is now minimized with the implementationof a preventative-maintenance program.

Winter: mid December to mid March. Cold, withvery clear skies quite often. Occasional rain, somecloud periods lasting several days. Generally goodSLR conditions day and night, routine daylight GPSacquisitions possible.

Autumn: October to mid December. Cooler,generally clear. Good SLR conditions day and night.

Summer: mid June through September. Generallyclear, with varying degrees of sky haze at all times. Day: high temperatures and directed sunlight onthe telescope make SLR operations difficult.Night: no problems, including occasional GPSacquisitions.

Spring: mid March to mid June: Difficult SLRconditions, day and night. Increasing daytimetemperatures, very hazy at times, occasional cloudperiods lasting several days – generally unsettled.

PlansBoost productivity by expanding operations to cover 2 shifts 5 days per week.Re-survey the site, work to remove any residual errors in adopted site coordinates.Analyze and tune to eliminate systematic errors, range biases, etc.Engineering improvements to the telescope (sun shields), AC/refrigeration systems, etc.Site development to include analysis capability, GPS calibration etc.

SALRO PRODUCTIVITY PERFORMANCE 1996 TO PRESENT

0

100

200

300

400

500

Jan

-96

Jun

-96

No

v-96

Ap

r-97

Sep

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Feb

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Jul-

98

Dec

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May

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Oct

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Mar

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HIGH orbitLAGEOS

RE-COMISSIONING

SALROFAT BY NASA

REPRESENTATIVES

SITE CLOSED

Detector changed to MCP

Two shift operation

ConclusionsKACST have a firm commitment to continue and develop SALRO operations, raising the profileof this science and its derivatives within the organization.Environmental conditions allow useful operations all year round, with peak performanceoccurring in autumn and winter.

New Executives (Washington 2002 October 11)

Chairman Yang Fu Min Shanghai Observatory, ChinaExecutive Wang Tanqiang Beijing Observatory, ChinaExecutive Ramesh Govind NMD/GA, AustraliaSecretary Ben Greene EOS, AustraliaExecutive Hiroo Kunimori CRL, JAPANExecutive Mikio Sawabe NASDA, JAPAN*Executive Victor Shargorodsky IPIE, RussiaExecutive Vladimir Vasilyev IPIE, RussiaExecutive Abdallah M. Azzeer KACST, Saudi Arabia *Executive Turki Al-Saud KACST, Saudi ArabiaExecutive India: Elango K.Udayar (ISRO)

* To be late approval or replacement in each organization.

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ion

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clus

ion

The

LL

R n

etw

ork

hang

s on

Blo

od, s

wea

t and

tear

sU

nbri

dled

tena

city

Data Center Report

CDDISEDC

ILRS Global Data Center Report / EDC

W. Seemüller

ILRS General Assembly, Washington D.C., October 11, 2002

DGFIDGFI I L R Snternational aser anging ervice

I L R Snternational aser anging ervice

ILRS Global Data Center Report / EDC

Wolfgang Seemüller

Some remarks:

Backup procedures are installed at both global Data Centers (EDCreplaced by Zimmerwald, CDDIS by EDC), EDC replacement is tested already, but CDDIS replacement not, no data at EDC ftp server from NASA stations (e.g. Sept. 13 to 15, power outage at CDDIS, no datasince installation on Sep. 15, 2001)

Still old IRVs are distributed by the ILRS IRV exploder(e.g. September 13 to 15, 2002)

New implementations

Two wavelength ONPs (separate files) are accepted, archived and distributed at both Global Data Centers (1 or 2 passes?)

New summary files at EDC, additionally the wavelength is given

New quality check for data format and integrity is installed at EDC(still missing: automatic information of the responsible SLR station)

ILRS General Assembly, Washington D.C., October 11, 2002 13th International Laser Ranging Workshop, October 2002

DGFIDGFI

I L R Snternational aser anging ervice

ILRS Global Data Center Report / EDC(continued)

New format of summary files

Sat.No. Stat. For. Date Start Dur. No. Wavl. R. File name

9306102 7840 onp 0210.03 68562 290 11 5320 0 ql_allsat_02100400 9306102 7835 onp 0210.03 68307 524 19 5324 0 ql_allsat_02100400 9502101 7810 onp 0208.22 77259 071 06 8460 0 ql_allsat_02082300 9502101 7810 onp 0208.22 77212 116 08 4230 0 ql_allsat_02082300

^^^^^^^ New! Laser wavelength & data release

New quality check for data format and integrityIf an error is detected, an error file is written, e.g.:

99999 9502101022777840350153200010026300000000743450200700001391568129997006842069054000007710261289007200450000000 391735494965006421851667000006710261289007200280000000 391877821513006122565434000006110261289007200340000000

#spt hr ?. . x . . . x. . . . . xx. x . . x . .

with the following meanings:

# the data record length is not 54s seconds of day is not < 86400p surface pressure out of the intervall < 600, 1100 > hPat surface temperature out of the intervall < 200, 340 > Kh humidity out of intervall < 0, 100 > %r release flag is changing in this pass? checksum not correct or not set to 00

ILRS General Assembly, Washington D.C., October 11, 2002 13th International Laser Ranging Workshop, October 2002

DGFIDGFI

SLR

mai

ls a

nd S

LRep

orts

per

mon

th s

ince

Nov

. 199

5

0102030405060708090100

110

0102030405060708090100

110

Sta

tus:

Oct

.01,

200

2

SLRmail981

SLReport2183

NOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC

1996

1997

1998

1999

2000

2001

2002

Working Group Reports

Oct

ober

11,

200

2

Mis

sion

s W

orki

ng G

roup

Rep

ort t

o G

A

ILR

S M

issi

ons

Wor

king

Gro

up

Was

hing

ton,

DC

USA

Oct

ober

11,

200

2

Oct

ober

11,

200

2Part

icip

ants

Lis

t M

WG

mee

ting

Oct

.7 ,2

002

•H

iroo

Kun

imor

i (C

RL

)

•Sc

ott W

etze

l (H

TSI

)

•D

avid

Car

ter

•U

lric

h Sc

hrei

ber

(TU

M)

•Ju

lie H

ovat

h (H

TSI

)

App

logi

es:

•W

olfg

ang

Schl

uter

(B

KG

)

•Jo

hn D

egna

n (N

ASA

)

•V

ladi

mir

Vas

iliev

(IP

IE)

•G

iuse

ppe

Bia

nco

(ASI

)

•W

erne

r G

urtn

er (

AIU

B)

•K

eita

pu M

aam

aatu

aiah

utap

u(U

PF)

•M

ike

Pear

lman

(CFA

)•

RO

N N

oom

an(D

EO

S)•

Lud

wig

Gru

nwal

dt (

GFZ

)•

Frow

n K

oidl

(G

raz)

•G

raha

m A

pple

by(N

ER

C)

•Pe

ter.

J.Sh

elus

(UT

/CSR

)•

Paul

Ste

vens

(H

TSI

)•

Chr

isto

per

Cla

rke

(HT

SI)

•H

owar

d D

onov

an (

HT

SI)

•A

ndre

w N

icho

las

(NR

L)

•M

ark

Dav

is (

HT

SI)

•C

hris

Moo

re (

EO

S)•

Kaz

imir

s L

apus

hka

(RIG

A)

•M

atti

Paun

onen

(FG

I)•

Wol

fgan

g Se

emul

ler

(DG

FI)

23

peo

ple

Oct

ober

11,

200

2

Age

nda/

Sum

mar

y•

MW

G m

embe

rshi

p

•P

ast

and

Cur

rent

Act

ivit

y Si

nce

Las

t M

eeti

ng (

Mar

ch 2

002

- N

ice,

Fra

nce)

•C

ampa

ign/

Mis

sion

Sta

tus

–E

talo

n -1

, -2

Upd

ate

by R

on N

oom

en -

Del

ft U

nive

rsit

y–

LR

EU

pdat

e by

Mak

i Mae

da -

NA

SDA

–R

efle

ctor

Upd

ate

by N

atal

ia P

arkh

omen

ko -

IP

IE

–St

arsh

ine-

3U

pdat

e by

Sco

tt W

etze

l - H

TSI

–M

eteo

r-3M

Upd

ate

by N

atal

ia P

arkh

omen

ko -

IP

IE

•M

issi

on/S

atel

lite

Dat

a B

ase

for

Sate

llite

Sig

natu

re S

tudy

/ CO

M in

form

atio

n

•C

onti

nuin

g an

d F

utur

e A

ctio

ns•

Wor

k w

ith

sate

llite

org

aniz

atio

ns t

o ge

t M

issi

on R

eque

st F

orm

s an

d Su

ppor

t P

lans

com

plet

ed a

nd p

ut o

n W

eb -

ongo

ing

•Sa

telli

te T

rack

ing

Pri

orit

y L

ist

•U

pcom

ing

Mis

sion

s•

Wit

hin

2002

–Ic

eSat

- 1

(Dec

embe

r 20

02)

- U

pdat

e by

Pet

er S

helu

s -

CSR

–A

DE

OS-

II(D

ecem

ber

2002

) -

Upd

ate

by M

aki M

aeda

- N

ASD

A

•B

eyon

d 20

02–

Cry

osat

(200

4) -

Upd

ate

by G

raha

m A

pple

bey

- NE

RC

–A

ND

E

(Lat

e 20

03)

- In

trod

ucti

on b

y A

ndre

w N

icho

las

NR

L

–G

ravi

ty P

robe

B

(Apr

il 20

03)

- U

pdat

e by

Sco

tt W

etze

l - H

TSI

–N

PO

ESS

(201

3) -

Upd

ate

by S

cott

Wet

zel -

HT

SI

•O

ther

Mis

sion

New

s

•O

ther

Iss

ues

Oct

ober

11,

200

2

CO

OR

DIN

AT

OR

(New

ly-e

lect

ed)

Dav

id C

arte

rN

ASA

USA

Dep

uty

Coo

rdin

ator

(N

ewly

–el

ecte

d)H

iroo

Kun

imor

iC

RL

Japa

n

Mm

embe

rshi

p in

clud

es:

Dav

id L

. Car

ter

NA

SA

USA

John

Deg

nan

NA

SAU

SAG

iuse

ppe

Bia

nco

ASI

Ital

yV

ladi

mir

Vas

iliev

IPIE

Rus

sia

Url

ich

Schr

eibe

rT

UM

Ger

man

ySc

ott W

etze

lH

TSI

USA

Julie

Hor

vath

HT

SIU

SA

Mem

bers

hip

acti

on•M

ore

activ

e pa

rtic

ipat

ion

to b

e re

crui

ted

for

mem

bers

hip

- ke

ep tr

ying

•Cha

nge

Mis

sion

Req

uest

For

m to

ref

lect

sat

ellit

e na

me

in m

essa

ge S

ubje

ct li

ne -

no

actio

n

New

MW

G M

embe

rshi

p

Oct

ober

11,

200

2

Past

and

Pre

sent

Cam

paig

ns

Eta

lon-

1, -

2•

Cam

paig

n ex

tend

ed a

t Nic

e m

eetin

g un

til th

e en

d of

Mar

ch ‘

03 -

•R

on N

oom

en to

pro

vide

cur

rent

sta

tus

of c

ampa

ign.

Oct

ober

11,

200

2

Past

and

Pre

sent

Cam

paig

ns

•L

RE

•O

ffic

ial c

ampa

ign

was

1 m

onth

in S

epte

mbe

r 20

01 a

nd v

ery

diff

icul

t tar

get t

o ac

quir

e du

e to

3 h

our

laun

ch d

elay

cau

sed

sate

llite

to lo

ose

mos

t of

the

term

inat

or c

ondi

tions

for

3 m

onth

s

•G

rass

e L

LR

sta

tion

fina

lly c

augh

t it i

n D

ecem

ber

2001

, the

n Y

arra

gade

e, th

en C

RL

•N

o SL

R tr

acki

ng s

ince

Mar

ch 2

8, 2

002

•K

unim

ori p

ropo

ses

to k

eep

LR

E tr

acke

d on

an

“as

avai

labl

e” b

asis

–N

ASD

A w

ill p

rovi

de T

IRV

rou

tinel

y fo

r C

AM

PAIG

N p

erio

d

–L

RE

at b

otto

m o

f pr

iori

ty li

st

•L

esso

ns L

earn

ed–

We

wer

e no

t rea

dy f

or th

is c

ampa

ign

–W

e w

ill w

ork

on b

ette

r st

atio

n po

intin

g

–W

e ne

ed c

ube

spec

ific

atio

ns –

Tos

hi

•N

ASD

A P

ropo

sed

the

SEC

ON

D c

ampa

ign

arou

nd M

arch

-Apr

il 20

03.

–P

repa

rato

ry in

form

atio

n w

ill b

e ci

rcul

ated

bef

ore

appr

ovin

g ca

mpa

ign.

•N

ight

vis

ibili

ty f

or k

ey s

tati

on (

Exa

mpl

e fo

llow

ed in

nex

t pa

ge)

•T

o pr

oduc

e go

od I

RV

pre

dict

ion.

•Si

gnal

str

engt

h in

form

atio

n an

d ex

peri

ence

fro

m la

st c

ampa

ign

Oct

ober

11,

200

2

Oct

ober

11,

200

2

Sate

llite

Tra

ckin

g Pr

iori

ty L

ist

–C

urre

nt tr

acki

ng p

rior

ity r

efle

cts

ILR

S tr

acki

ng r

equi

rem

ents

–A

t the

Nic

e m

eetin

g Pe

te S

helu

s su

gges

ted

dyna

mic

trac

king

pri

oriti

es w

ith c

ontin

uous

mon

itori

ng o

f al

l sat

ellit

es a

nd s

yste

ms

and

adju

st tr

acki

ng p

rior

ities

to p

ick

up o

n w

eak

sate

llite

s.

–Se

e pa

pers

in m

ain

conf

eren

ce W

ahin

gton

DC

suc

h as

Bar

t Cla

rke’

s pa

per

on “

Inte

llige

ntSc

hedu

ler,

Pri

oriti

ze o

n th

e Fl

y” w

hich

will

add

ress

man

y of

thes

e is

sues

.

–T

o m

axim

ize

effi

cien

cy o

f in

terl

eavi

ng s

atel

lite,

sta

tion

s w

ish

to k

now

cri

teri

on f

orea

ch s

atel

lite

from

ana

lysi

s po

int

of v

iew

. (e

.g.

how

muc

h ti

me/

volu

me

num

ber

ofno

rmal

poi

nts

in t

he p

ass,

etc

)

–T

here

is n

o si

mpl

e cr

iter

ion

fro

m a

naly

sis,

tho

ugh

shou

ld m

ove

to e

xplo

re.

– T

here

is s

ugge

stio

ns t

hat

pilo

t pr

ogra

m c

ould

be

init

iati

ve in

a e

nvir

onm

ent

e.g.

inE

urol

as r

ealt

ime

tim

ebia

s se

rver

c pr

opos

ed.

Oct

ober

11,

200

2

Past

and

Pre

sent

Cam

paig

ns (

2)R

efle

ctor

•R

efle

ctor

is a

Rus

sian

sat

ellit

e w

here

SL

R is

use

d to

sup

port

PO

Dre

sear

ch f

or s

pace

deb

ris

dete

ctio

n

•L

aunc

hed

Dec

embe

r 10

, 200

1

•T

empo

rary

em

erge

ncy

appr

oval

by

the

GB

on

Dec

embe

r 20

, 200

1

•C

ampa

ign

Dur

atio

n w

as r

eque

sted

for

9 m

onth

s

•SL

R b

egan

on

Dec

embe

r 21

, 200

1–

Firs

t ope

ratio

nal R

efle

ctor

pas

s re

ceiv

ed b

y Y

arra

gade

e

–T

rack

ing

lead

ers

are

Yar

raga

dee,

Gra

z, R

GO

and

Mon

umen

t Pea

k

–C

urre

ntly

31

syst

ems

trac

king

Ref

lect

or

•Ju

stif

icat

ion

for

cont

inua

tion

of c

ampa

ign

was

pro

vide

d an

d ap

prov

alw

as g

iven

to c

ontin

ue c

ampa

ign

until

Aug

ust 2

002

then

ext

ende

d un

tilre

port

at I

LR

S m

eetin

g

•IP

IE r

eque

sted

Ful

l-ra

te d

ata

supp

lied

dire

ctly

to th

em to

stu

dy a

rray

resp

onse

–Fu

ll-ra

te d

ata

was

ori

gina

lly r

ecei

ved

from

CD

DIS

for

NA

SA o

nly

stat

ions

–Fu

ll-ra

te S

tudy

Gro

up r

ecom

men

ded

dire

ct f

ull r

ate

tran

smis

sion

fro

m o

ther

syst

ems

to I

PIE

–IP

IE n

oted

that

“N

ow w

e re

ceiv

e FR

dat

a fr

om H

erst

mon

seau

, Mou

ntSt

rom

lo, S

an F

erna

ndo,

and

fro

m s

ome

othe

r st

atio

ns”.

Oct

ober

11,

200

2

Ref

lect

or D

ata

Yie

ld(1

2/21

/01-

10/0

3/02

)

0

50

100

150

200

250

300

350

400

MOBLAS 5

AUSLAS

RGOLAS

MOBLAS 4

MOBLAS 6

MOBLAS 7

SPNLAS

CHALAS

GRASSE

MLRS

RIGLAS

SALRO

ZIMLAT

HOLLAS

TLRS 3

MOBLAS 8

CHILAS

SHOLAS

WLRS01

SIMLAS

STROMLO

BEJLAS

GFZLAS

MDNLAS

MENLAS

MD2LAS

CRMLAS

KOMLAS

TIGO

Metsaho2

Kunming

Station

Passes

Oct

ober

11,

200

2

Past

and

Pre

sent

Cam

paig

ns (

3)

Star

shin

e 3

•St

arsh

ine

sate

llite

s w

ere

to b

e tr

acke

d by

NA

SA s

tatio

ns a

nd o

ther

s if

des

ired

to d

eter

min

e ut

ility

of

the

retr

oref

lect

ors

•St

arsh

ine

3 la

unch

ed o

n Se

ptem

ber

30, 2

001

–Fi

rst S

tars

hine

-3 p

ass

rece

ived

by

Yar

raga

dee

on O

ctob

er 3

, 200

1

–T

rack

ing

limite

d to

NA

SA s

tatio

ns a

nd a

nyon

e w

ho w

ante

d to

try

trac

king

(10

)

–N

RL

pro

vide

d hi

gh q

ualit

y pr

edic

tions

to h

elp

supp

ort a

cqui

sitio

n bu

t dat

a av

aila

bilit

y w

as in

freq

uent

–St

arsh

ine-

3 sc

hedu

led

to d

e-or

bit o

n ap

prox

imat

ely

Oct

ober

30,

200

2

02468101214

MOBLAS 5

MOBLAS 7

MOBLAS 4

RGOLAS

Metsaho2

ZIMLAT

CHILAS

AUSLAS

CHALAS

HOLLAS

Station

Passes

Oct

ober

11,

200

2

Rec

ent L

aunc

hes

/ New

Mis

sion

s (3

)

Met

eor-

3M•

Met

eor-

3M w

as la

unch

ed o

n D

ecem

ber

10, 2

001

alon

g w

ith R

efle

ctor

•M

eteo

r-3M

is u

sing

an

Opt

ical

Lun

eber

g L

ens

for

SLR

trac

king

•SL

R o

rigi

nally

lim

ited

by a

gree

men

t to

Gre

enbe

lt, M

onum

ent P

eak,

a R

ussi

an s

tatio

n ne

ar M

osco

w a

sa

test

onl

y–

the

SAG

E p

roje

ct w

as c

once

rned

abo

ut in

terf

eren

ce in

thei

r so

lar

expe

rim

ents

–re

stri

cted

trac

king

ele

vatio

ns

–tr

acki

ng in

nig

httim

e ho

urs

only

•A

t a m

eetin

g w

ith th

e SA

GE

team

in F

ebru

ary

it w

as d

iscl

osed

that

the

GL

ON

ASS

/GPS

rec

eive

r on

-bo

ard

Met

eor-

3M w

as n

ot f

unct

ion.

–SL

R h

ad n

ow b

ecom

e th

e on

ly m

etho

d fo

r PO

D in

sup

port

of

SAG

E -

Rad

ar tr

acki

ng e

nds

on A

pril

30, 2

002

•SA

GE

team

req

uest

ed to

Met

eor-

3M g

roup

to s

uppo

rt S

LR

-–

No

rest

rict

ions

for

ele

vatio

n or

day

light

trac

king

•O

n A

pril

3rd

a M

issi

on S

uppo

rt R

eque

st F

orm

was

sub

mitt

ed f

or I

LR

S su

ppor

t of

Met

eor-

3M

•G

over

ning

Boa

rd A

ppro

val a

t IL

RS

GB

mee

ting

Oct

ober

11,

200

2

Met

eor-

3M D

ata

Yie

ld(1

2/21

/01-

10/0

2/02

)

0

10

20

30

40

50

60

70

MOBLAS 5

RGOLAS

MOBLAS 4

AUSLAS

SALRO

SPNLAS

GRASSE

MOBLAS 6

MOBLAS 7

CHALAS

HOLLAS

CHILAS

GFZLAS

SHOLAS

MLRS

STROMLO

RIGLAS

MLRO

WLRS01

BEJLAS

Station

Passes

Oct

ober

11,

200

2

Cur

rent

Tra

ckin

g pr

iori

ties

Alt

itud

eIn

clin

atio

nP

rior

ity

Mis

sion

Spon

sor

(k

m)

(de

gree

s)C

omm

ents

1G

RA

CE

A, B

GFZ

/NA

SA48

5-50

089

Gra

vity

res

earc

h (T

wo

sate

llite

s tr

acke

d al

tern

atel

y)2

CH

AM

PG

FZ42

9-47

487

.27

Gra

vity

res

earc

h3

GFO

-1U

S N

avy

790

108.

0A

ltim

eter

cal

ibra

tion

/ no

othe

r tr

acki

ng te

chni

que

avai

labl

e4

Env

isat

-1E

SA80

098

.6A

ltim

eter

cal

ibra

tion

/ DO

RIS

bac

kup

5E

RS-

2E

SA80

098

.6A

ltim

eter

cal

ibra

tion

/ PR

AR

E b

acku

p6

Jaso

nN

ASA

/CN

ES

1,35

066

.0A

ltim

eter

/ D

OR

IS a

nd G

PS b

acku

p7

TO

PEX

/Pos

eido

nN

ASA

/CN

ES

1,35

066

.0A

ltim

eter

cal

ibra

tion

/ DO

RIS

and

GPS

bac

kup

8St

arle

tteC

NE

S81

5-1,

100

49.8

Geo

detic

/ n

o ot

her

trac

king

tech

niqu

e av

aila

ble

9St

ella

CN

ES

815

98.6

Geo

detic

/ n

o ot

her

trac

king

tech

niqu

e av

aila

ble

10

Met

eor-

3MIP

IE10

2099

.64

Ret

rore

flec

tor

rese

arch

/ N

o ot

her

trac

king

tech

niqu

e av

aila

ble

11B

eaco

nCN

ASA

950-

1300

41G

ravi

ty R

esea

rch

/ upg

rade

d to

ong

oing

mis

sion

(Ja

n 20

02)

12R

EFL

EC

TO

RIP

IE1,

020

99.6

POD

res

earc

h fo

r sp

ace

debr

is d

etec

tion

13A

jisai

NA

SDA

1,48

550

Geo

detic

/ n

o ot

her

trac

king

tech

niqu

e av

aila

ble

14L

AG

EO

S2A

SI/N

ASA

5625

52.6

Geo

detic

/ n

o ot

her

trac

king

tech

niqu

e av

aila

ble

15L

AG

EO

S1N

ASA

5850

109.

8G

eode

tic /

no

othe

r tr

acki

ng te

chni

que

avai

labl

e16

Eta

lon1

Rus

sian

Fed

erat

ion

19,1

0065

.3G

eode

tic /

no

othe

r tr

acki

ng te

chni

que

avai

labl

e17

Eta

lon2

Rus

sian

Fed

erat

ion

19,1

0065

.2G

eode

tic /

no

othe

r tr

acki

ng te

chni

que

avai

labl

e18

GL

ON

ASS

86R

ussi

an F

eder

atio

n19

,100

65Po

sitio

ning

PO

D e

nhan

cem

ent /

rep

lace

d G

70 a

s of

02/

20/0

2

19G

LO

NA

SS87

Rus

sian

Fed

erat

ion

19,1

0065

Posi

tioni

ng P

OD

enh

ance

men

t / r

epla

ced

G72

as

of 2

/20/

0220

GL

ON

ASS

84R

ussi

an F

eder

atio

n19

,100

65Po

sitio

ning

PO

D e

nhan

cem

ent /

rep

lace

d G

79as

of

2/22

/01

21G

PS35

US

DoD

20,1

0054

.2Po

sitio

ning

PO

D e

nhan

cem

ent

22G

PS36

US

DoD

20,1

0055

.0Po

sitio

ning

PO

D e

nhan

cem

ent

Oth

er T

arge

ts o

f O

ppor

tuni

ty:

Star

shin

e 3

US

Coo

pera

tive

470

67D

rag

rese

arch

/ no

oth

er tr

acki

ng te

chni

que

avai

labl

eL

RE

NA

SDA

250-

3600

028

.5H

EO

Cha

ract

eriz

atio

n /

Spin

evo

lutio

n vs

. BK

7 de

grad

atio

n

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

Sat

ellit

e

Ow

ner

Mis

sion

Typ

e

Pl

anne

d L

aunc

h D

ate

M

issi

on D

urat

ion

R

ecei

ved

Mis

sion

R

eque

st F

orm

R

ecei

ved

ILR

S G

B

App

rova

l

IceS

at (G

LA

S)

NA

SA

Ice

shee

t res

earc

h m

id-D

ecem

ber 2

002

3-5

year

s Y

es

Y

es

A

DE

OS-

II

NA

SDA

R

emot

eSen

sing

C

alib

ratio

nGPS

D

ecem

ber 2

002

3 ye

ars

Yes

Y

es

Gra

vity

Pro

be B

N

ASA

R

elat

ivity

rese

arch

A

pril

2003

1-

2 ye

ars

Yes

Y

es

AN

DE

NR

L D

rag

rese

arch

L

ate

2003

No

No

Cry

oSat

E

SA

Ear

th S

ensi

ng

Apr

/May

200

4 3.

5 ye

ars

Yes

A

wai

ting

MW

G

Rec

omm

end

atio

n IR

S IS

RO

R

emot

eSen

sing

C

alib

ratio

nGPS

N

o N

o

AL

OS

NA

SDA

R

emot

eSen

sing

C

alib

ratio

nGPS

2

005

3 ye

ars

No

No

ET

S-V

III

NA

SDA

T

ime

tran

sfer

/PO

D

exp

erim

ent

Q1

in 2

005

3 ye

ars

No

No

NPO

ESS

N

OA

A

Ear

th S

ensi

ng

2013

7

year

s Y

es

No

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

(with

in 2

002)

AD

EO

S-II

(A

dvan

ced

Ear

th O

bser

ving

Sat

ellit

e)•

AD

EO

S-II

is a

n E

arth

Sen

sing

mis

sion

hos

ted

by N

ASD

A•

AD

EO

S-II

is c

urre

ntly

sch

edul

ed to

be

laun

ched

in N

ovem

ber

1-30

, 200

2•

SLR

sup

port

req

uire

d fr

om L

+39

days

to s

uppo

rt P

OD

- G

PS w

ill b

e tu

rned

off

dur

ing

this

peri

od•

Issu

e w

ith p

ossi

ble

dam

age

to G

LI

from

SL

R c

ausi

ng m

uch

prob

lem

with

trac

king

•M

aki M

aeda

pro

vide

d st

atus

on

mis

sion

and

to p

rovi

de s

peci

fica

tions

and

ana

lysi

s fo

rsa

fety

con

cern

s fo

r th

e G

LI

ICE

Sat (

Ice,

Clo

ud, a

nd L

and

Ele

vatio

n Sa

telli

te)

•IC

ESa

t is

a N

ASA

mis

sion

to m

easu

re th

e ic

e sh

eet m

ass,

bal

ance

, clo

ud a

nd a

eros

olhe

ight

s, o

ptic

al d

ensi

ties,

veg

etat

ion

and

land

topo

grap

hy h

oste

d by

NA

SA /

CSR

.

•IC

ESa

t is

curr

ently

sch

edul

ed to

be

laun

ched

in m

id D

ecem

ber

2002

•Pr

epar

atio

ns f

or S

LR

sup

port

are

ong

oing

at U

nive

rsity

of

Tex

as, g

ood

coor

dina

tion

with

ILR

S•

HT

SI to

incl

ude

GPS

dat

a in

pre

dict

ion

gene

ratio

n•

Arr

ay c

onfi

rmat

ion

only

for

L+3

0 da

ys, t

hen

until

L+6

mon

ths

SLR

is h

igh

prio

rity

•Pe

ter

Shel

us to

pro

vide

sta

tus

of m

issi

on•

Scot

t Wet

zel t

o pr

ovid

e st

atus

of

GPS

sup

port

ed p

redi

ctio

ns

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

(bey

ond

2002

)

GPB

(G

ravi

ty P

robe

B)

•G

PB is

a N

ASA

/ St

anfo

rd U

nive

rsity

rel

ativ

ity m

issi

on

•G

PB is

sch

edul

ed f

or la

unch

in A

pril

2003

•C

oord

inat

ion

effo

rts

betw

een

ILR

S an

d M

issi

on o

n-go

ing

–G

PB O

rbit

Det

erm

inat

ion

and

Orb

it T

rim

Rev

iew

hel

d in

Jun

e 20

02

Atm

osph

eric

Neu

tral

Dra

g E

xper

imen

t (A

ND

E)

•A

ND

E is

an

NR

L r

esea

rch

sate

llite

sys

tem

as

a m

eans

to c

alib

rate

atm

osph

eric

dra

g ef

fect

s on

low

eart

h or

bitin

g sa

telli

tes.

•T

he p

rogr

am c

onsi

sts

of tw

o sm

all s

pher

ical

sat

ellit

es

•D

ata

abou

t the

pos

ition

of

the

sate

llite

s ca

n be

use

d to

cal

cula

te th

e dr

ag o

n th

e sa

telli

te a

nd th

eat

mos

pher

ic d

ensi

ty a

t tha

t alti

tude

.

•T

he d

ata

will

als

o be

use

d to

ans

wer

que

stio

ns a

bout

the

impa

ct o

f sp

acec

raft

com

posi

tion

and

ther

mal

cha

ract

eris

tics

whe

n co

mpu

ting

theo

retic

al b

allis

tic c

oeff

icie

nts

•A

ndre

w N

icho

las

from

NR

L to

pro

vide

info

rmat

ion

on th

e A

ND

E m

issi

on

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

(2)

(bey

ond

2002

)

Star

shin

e 4/

5•

Star

shin

e 4/

5 la

unch

situ

atio

n m

ay b

e im

prov

ing

a bi

t.

–Sa

telli

tes

wer

e bu

mpe

d fr

om th

e ST

S-11

4 m

issi

on b

y an

Int

erna

tiona

l Spa

ce S

tatio

n co

ntro

l mom

ent g

yro.

–St

arsh

ines

4 a

nd 5

mig

ht n

ot g

et to

fly

unt

il 20

05 o

r 20

06, a

s a

resu

lt of

a b

udge

t-dr

iven

dec

reas

e in

Spa

ceSh

uttle

laun

ch r

ates

to f

our

per

year

–L

imite

d nu

mbe

r of

shu

ttle

flig

hts

may

aga

in b

e in

crea

sed.

–M

ore

to f

ollo

w a

s kn

own

•St

arsh

ine

4/5

will

hav

e m

ount

ed 1

000

mir

rors

and

31

lase

r re

tror

efle

ctor

s on

its

exte

rnal

she

ll.

•St

arsh

ine

4/5

Mis

sion

Pla

n

–R

elea

se f

rom

Sta

rshi

ne 4

, a 4

inch

(10

cm

) ho

llow

alu

min

um s

pher

e, in

stea

d, w

hich

will

be

Star

shin

e 5.

–T

his

smal

l sub

sate

llite

will

be

rele

ased

sho

rtly

aft

er S

tars

hine

4 is

dep

loye

d fr

om S

pace

Shu

ttle

Atla

ntis

–B

oth

Star

shin

es 4

and

5 w

ill c

arry

31

lase

r re

tror

efle

ctor

s on

thei

r su

rfac

es

–St

arsh

ine

5 w

ill h

ave

no m

irro

rs a

nd w

ill th

us n

ot b

e na

ked-

eye

visi

ble,

so

trac

king

will

dep

ende

nt to

tally

on I

LR

S an

d Sp

ace

Com

man

d tr

acki

ng f

or o

rbit

dete

rmin

atio

n of

this

sat

ellit

e.

–B

y co

mpa

ring

the

orbi

tal d

ecay

rat

es o

f St

arsh

ine

4 an

d 5,

it w

ill p

ossi

ble

for

us to

det

erm

ine

the

dens

ity o

f

the

eart

h's

atm

osph

ere

mor

e pr

ecis

ely

than

we'

ve b

een

able

to d

o on

pre

viou

s m

issi

ons.

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

(3)

(bey

ond

2002

)

Cry

osat

•M

issi

on R

eque

st f

orm

rec

eive

d

•W

orki

ng w

ith M

WG

on

appr

oval

s fo

llow

ing

Cla

rifi

catio

ns to

for

m

•G

raha

m A

pple

by f

rom

NE

RC

to p

rovi

de in

form

atio

n on

Cry

osat

Oct

ober

11,

200

2

Upc

omin

g M

issi

ons

(4)

(bey

ond

2002

)

The

Nat

iona

l Pol

ar-o

rbiti

ng O

pera

tiona

l Env

iron

men

tal S

atel

lite

Syst

em (

NPO

ESS

)•

Mis

sion

Req

uest

for

m r

ecei

ved

in J

uly

•M

issi

on n

ot s

ched

uled

unt

il A

pril

2013

, how

ever

, ear

ly m

issi

on p

lann

ing

done

to d

eter

min

e if

they

can

use

SL

R.

•In

crea

ses

the

timel

ines

s, a

ccur

acy,

and

cos

t-ef

fect

iven

ess

of p

ublic

war

ning

s an

d fo

reca

sts

ofse

vere

wea

ther

eve

nts;

impr

oved

mic

row

ave

imag

ery

soun

ding

pro

duct

s w

ill im

prov

e pr

edic

tion

of o

cean

sur

face

win

d sp

eed

and

dire

ctio

n

•Su

ppor

ts g

ener

al a

viat

ion,

agr

icul

ture

, and

mar

itim

e co

mm

uniti

es a

imed

at i

ncre

asin

g U

.S.

prod

uctiv

ity; i

mpr

oved

ear

ly w

arni

ngs

will

miti

gate

the

deva

stat

ing

effe

cts

of f

lood

s th

roug

hdi

sast

er p

lann

ing

and

resp

onse

•A

ntic

ipat

ed L

aunc

h:A

pril

2013

Mis

sion

Dur

atio

n:7

year

s

•O

rbita

l Par

amet

ers

•A

ltitu

de:

833

± 17

km

Incl

inat

ion:

98.7

± 0

.05

•E

ccen

tric

ity:

0.00

11

Oct

ober

11,

200

2

•N

POE

SS T

rack

ing

Req

uire

men

ts–

Tra

ckin

g Sc

hedu

le:

Mon

thly

Spat

ial C

over

age:

15

to 2

0 si

tes

with

hig

h pr

iori

ty

–T

empo

ral C

over

age:

Con

tinuo

us f

or 4

day

s pe

r m

onth

–D

ata

Acc

urac

y:2

cm

–SL

R w

ill b

e em

ploy

ed a

t the

sta

rt o

f th

e m

issi

on f

or in

itial

cal

ibra

tion,

and

for

per

iodi

c va

lidat

ions

and

corr

ectio

n. C

alib

ratio

n w

ill b

e re

quir

ed a

ppro

xim

atel

y m

onth

ly.

–SL

R-b

ased

cal

ibra

tion,

usi

ng h

igh-

elev

atio

n SL

R to

the

GPS

-der

ived

NPO

ESS

PO

D o

rbits

, pro

duce

s an

inde

pend

ent m

easu

re o

f th

e ra

dial

acc

urac

y an

d st

abili

ty (

drif

t) o

f th

e PO

D s

olut

ions

. Thi

s te

chni

que

rem

oves

the

drif

t in

the

POD

orb

it (e

ffec

tivel

y th

e dr

ift w

ith r

espe

ct to

the

fram

e in

clud

ing

the

tide

gaug

es)

from

the

altim

eter

-der

ived

–SS

H m

easu

rem

ent d

rift

for

reg

ions

sur

roun

ding

sel

ecte

d tid

e ga

uges

. T

ide

gaug

es n

ear

SLR

trac

king

site

san

d G

PS s

tatio

ns m

inim

ize

the

effe

cts

of g

eogr

aphi

cal v

aria

tions

in th

e ra

dial

orb

it dr

ift,

thus

allo

win

g th

eal

timet

er m

easu

rem

ent d

rift

to b

e co

mpa

red

(and

cal

ibra

ted

if n

eces

sary

) w

ith th

e co

rres

pond

ing

valu

e

from

the

tide

gaug

e da

ta. Upc

omin

g M

issi

ons

(5)

(bey

ond

2002

)

Oct

ober

11,

200

2

Oth

er M

issi

on N

ews

Jaso

n M

aneu

ver

issu

es

•Ja

son

man

euve

r m

essa

ges

are

not f

ollo

win

g pr

oper

for

mat

ting

guid

elin

es

•C

urre

ntly

wor

king

with

Jas

on te

am to

res

olve

man

euve

r fo

rmat

issu

es

IRS

(Ind

ia)

mis

sion

sta

tus

upda

ted

by K

.Ela

ngo.

ILR

S E

ight

h G

ener

al A

ssem

bly

Net

wor

k an

d E

ngin

eeri

ng W

orki

ng G

roup

Wer

ner

Gur

tner

Was

hing

ton

D.C

. O

ctob

er 1

1, 2

002

Net

wor

k an

d E

ngin

eeri

ng W

orki

ng G

roup

•M

eetin

g on

Mon

day,

Oct

ober

7, 2

002

•Si

te lo

g da

ta b

ase

–av

aila

ble

on th

e W

eb: S

ite lo

g fi

les,

mas

ter

Exc

el f

ile–

upda

te p

roce

dure

s to

be

fina

lized

•K

now

ledg

e da

ta b

ase

–B

iblio

grap

hy o

n th

e W

eb•

Upd

ate

impo

rtan

t•

Send

ref

eren

ces

to th

e C

entr

al B

urea

u–

To

be s

uppl

emen

ted

by "

hint

s an

d ty

ps"

for

typi

cal h

ardw

are

•W

eekl

y an

alys

is r

epor

ts:

–"W

ish

list"

to b

e fo

rmul

ated

by

stat

ions

•D

ynam

ic p

rior

ities

:–

Firs

t dis

cuss

ions

sta

rted

•T

ime

bias

ser

ver

and

real

tim

e st

atus

exc

hang

e–

Stat

ions

urg

ed to

join

, use

, and

giv

e fe

edba

ck•

NW

&E

WG

Coo

rdin

ator

–N

ew: G

eorg

Kir

chne

r

I L R Snternational aser anging ervice

International Laser Ranging Service

Data Formats & Procedures Working Group

Agenda

Tuesday, October 08, 2002, 18:00-19:30Washington D.C., USA

Breakout Room

1. Welcome and Introduction Wolfgang Seemüller

2. Membership Wolfgang Seemüller

3. Review of CB Activities Van Husson

4. Refraction Study Group Report Stefan Riepl

5. Prediction Format Study Group Report Randy Ricklefs(separate meeting: October 07, 21:00-22:30, Breakout Room)

6. Two colour data submission and management Werner Gurtner

7. Working Group Charter/WG Activities Wolfgang Seemüller, allWhat can our WG do to reach the 1 mm ranging accuracy?

8. Management of prediction Exploder after break down Wolfgang Seemüller

9. IRV Provider ID in IRV data set W. Gurtner, S. Riepl

10. FR data format to accommodate calibration data, V. Husson, C. Noll, W. Gurtner,data flow and filename convention W. Seemüller

DGFIDGFI

I L R Snternational aser anging ervice

Data Formats & Procedures Working Group Report

Wolfgang Seemüller

Two colour wavelength data submission and management installedNew quality check for data format and data integrity now at both GlobalData CentersFull-rate data format and archiving in progress (see below)IRV provider ID in IRV data set in new prediction format includedRefraction Study Group - see Report by Stefan Riepl

Prediction Format Study Group - see Report by Randy Ricklefs

CB ActivitiesNormal Point Data: - Sites need to ensure the release flag is updated

- Improvement of data replacement procedures- Periodic comparison of data centers NP statistics

Full Rate data: see below

Site Logs: Sites need to keep their logs and local ties current

Standard software packages: - NP generation (volunteers?)- Integration of satellite predictions (volunteers?)- EDC provide their software for format and data integrity check

Multi-colour ranging NP data: EDC and CDDIS have modified their data handling procedures

FR data meeting on Thursday noon, decisions:Three issues were discussed: Frequency of delivery, file name convention, and accomodation ofthe FR data format to calibration data.

- The stations send a daily file for each satellite to the Global Data Centers, containingall passes starting the same day

- File name convention: file naming as of CDDIS, but satellite names without dashes- Recommendation: the calibration data will not be archived. If needed the station should be contacted

Implementation date: March 01, 2003A SLRmail with the details will be sent in November 2002

ILRS General Assembly, Washington D.C., October 11, 2002October 11, 2002

13th International Laser Ranging Workshop,October 07-11, 2002

DGFIDGFI

Refraction Study Group Summary

13th International Workshop on Laser Ranging, Washington,

USA,7-11 October 2002

• Currently available refraction models show differences at the

millimeter level

• 2-colour lasere ranging is currently limited to about 1cm

accuracy for remote sensing of refraction, i.e. inmature to

tzest millimeter effects

• Arrangements have bee made to perform a comparison of

– MARINI-MURRAY refraction model and

– the recently introduced mapping function derived by

MENDES in conjunction with the SAASTOMOINEN

zenith path delay formula.

An improvement in the modelling of the atmospheric delay

should show up in better residual statistics at low elevations.

• Results are to be presented at the next analysis working

group meeting in Nice, 2003.

– Typeset by FoilTEX – 1

ILR

S Pr

edic

tion

Form

at S

tudy

Gro

up11

Oct

ober

200

21

Pre

dict

ion

For

mat

s S

tudy

Gro

up"L

ynx

Tea

m"

Com

mis

sion

ed b

y:T

he IL

RS

Dat

a F

orm

ats

and

Pro

cedu

res

Wor

king

Gro

upat

Mat

era,

Nov

embe

r 20

00

Pre

sent

atio

n pr

epar

ed b

yR

. Ric

klef

sU

nive

rsity

of T

exas

at A

ustin

McD

onal

d O

bser

vato

ry a

nd C

ente

r fo

r S

pace

Res

earc

h(r

lr@as

tro.

as.u

texa

s.ed

u)

ILR

S Pr

edic

tion

Form

at S

tudy

Gro

up11

Oct

ober

200

22

Pur

pose

Rec

omm

end

a si

ngle

lase

r ra

ngin

g pr

edic

tion

form

at to

enc

ompa

ss

•Ear

th s

atel

lites

•Lun

ar la

ser

retr

o-re

flect

ors

•Las

er tr

ansp

onde

rs o

n or

orb

iting

oth

er s

olar

sys

tem

bod

ies

•Las

er tr

ansp

onde

rs in

tran

sit

ILR

S Pr

edic

tion

Form

at S

tudy

Gro

up11

Oct

ober

200

23

Cur

rent

Sta

tus

•Lun

ar a

nd tr

ansp

onde

r fe

asib

ility

stu

dies

are

nea

rly c

ompl

ete.

No

“sho

w s

topp

ers”

hav

e be

en fo

und.

•Int

erpo

lato

r te

sts

are

near

ly c

ompl

ete.

Nee

d to

insu

re th

atin

terp

olat

or w

orks

with

nor

mal

poin

t gen

erat

ion.

•Pre

limin

ary

form

at is

rea

dy fo

r re

view

•Sam

ple

code

is in

ear

ly s

tage

s

ILR

S Pr

edic

tion

Form

at S

tudy

Gro

up11

Oct

ober

200

24

For

mat

Fea

ture

s

•Tab

ular

(gr

id)

form

at (

inte

rpol

atio

n, n

ot in

tegr

atio

n)•S

tate

vec

tors

spa

ced

as r

equi

red

(fix

ed o

r va

riabl

e)•T

rue

body

-fix

ed c

oord

inat

es•M

ultip

le h

eade

r an

d ep

hem

eris

rec

ord

type

s•S

peci

al r

ecor

d ty

pes

to h

andl

e fe

atur

es o

f par

ticul

ar ta

rget

cla

sses

•Rec

ords

sho

rt e

noug

h fo

r e-

mai

l•A

llow

s fo

r in

tegr

atio

n be

yond

last

rec

ord

of fi

le•S

ome

free

form

at r

ecor

ds•R

emov

es n

eed

for

drag

mes

sage

s

ILR

S Pr

edic

tion

Form

at S

tudy

Gro

up11

Oct

ober

200

25

The

Nex

t Ste

ps

•Dis

trib

ute

form

at w

idel

y w

ithin

lase

r co

mm

unity

for

com

men

t

•Dev

elop

sam

ple

code

•Con

duct

pilo

t pro

ject

s us

ing

new

form

at a

t sev

eral

sta

tions

•Ref

ine

form

at a

s ne

eded

•Mak

e pl

ans

for

gene

ral i

mpl

emen

tatio

n

•See

k IL

RS

Gov

erni

ng B

oard

’s a

ppro

val f

or im

plem

enta

tion

Pilot project “harmonization”

Goal make QC results more consistent

Issues ITRF2000 performance report card

Pilot project “benchmarking”

Characteristics October 10 – November 7, 1999 LAGEOS-1 Produce identical integration and estimation results (i.e. detect

software and data treatment errors and blunders) A: direct integration

B: estimation orbitC: estimation orbit, EOPs and station coordinatesD: idem, no requirements on dynamic orbit model

Contributors ASI, CRL, CSR, DGFI, GEOS, IAAK, JCET, NASDA, NERC

First results Residuals diverge up to several m (“A”) Mean residuals diverge several dm (“A”), several mm (“B”), 0.1

mm (“C”) Orbits disagree up to several m (“A”), ~ 0.6 m (“B”), cm (“C”) Refraction corrections consistent at 0.2 mm Relativity corrections consistent at 0.1 mm

Future refine description and re-analysis develop reference solution pass/fail benchmark test essential for other contributions

Pilot project “positioning + earth orientation”

Purposes solutions for EOPs and station coordinates 28-day intervals “A”: 1999 (LAGEOS) “B”: 2001-2002 (LAGEOS vs. Etalon; EOP vs. EOPdots) official ILRS product

Customers IERS Bulletin A ITRF? …

Contributors ASI, BKG, CRL, CSR, DGFI, GEOS, GRGS, IAA, IAAK, JCET,

NERC

Call for Participation

Products daily x/y-pole, LOD for most recent days (-> IERS Bulletin A) daily x/y-pole, LOD (28 days) + coordinates

2 Types of contributions solicited data reduction combination

Operational timeline

Timeline October 31, 2002: disseminate CFP December 15, 2002: “benchmarking “ criteria established December 31, 2003: reactions “in” January 15, 2002: data reduction contributors selected January 15 – March 15, 2003: test period for candidate

combination centers April 2003: selection of prime and back-up combination centers May 1, 2002: system fully operational

ILR

S G

ener

al A

ssem

bly

Frid

ay O

ctob

er 1

1th 2

002

Sig

nal

Pro

cess

ing

ad

-ho

c W

GG

raha

m A

pple

by

•S

mal

l wor

king

gro

up w

ith c

lear

prim

ary

goal

of

com

putin

g sy

stem

-dep

ende

nt C

oM v

alue

s fo

rsp

heric

al s

atel

lites

;•

Com

e a

long

way

sin

ce e

arly

det

ectio

ns o

f effe

ct in

sing

le-p

hoto

n da

ta –

late

st r

esul

ts fo

r LA

GE

OS

,A

JIS

AI a

nd E

TA

LON

wer

e pr

esen

ted

in T

arge

tS

igna

ture

s se

ssio

n of

LW

13;

•In

form

al m

eetin

gs (

at E

GS

, ILR

S w

/s)

plus

em

ail

corr

espo

nden

ce, i

nclu

ding

val

uabl

e in

put f

rom

HT

SI

on N

AS

A-s

yste

m c

onfig

urat

ion;

Current/Future

•W

orki

ng w

ith H

TS

I col

leag

ues

to fo

rm a

nIL

RS

dat

abas

e of

atti

tude

alg

orith

ms

for

CoM

corr

ectio

ns fo

r th

e no

n-sp

heric

al s

atel

lites

;

•re

com

men

d to

the

MW

G th

at a

ll fu

ture

prop

osal

s fo

r IL

RS

sup

port

incl

ude

attit

ude

algo

rithm

s as

wel

l as

LRA

CoM

vec

tors

;

•ne

ed to

look

now

at p

oten

tial m

m-le

vel e

ffect

sin

arr

ay c

orre

ctio

ns fo

r th

e “s

mal

l-clu

ster

”ar

rays

in c

urre

nt u

se (

ER

S, J

ason

, EN

VIS

AT

,G

FO

,…).

•N

ew m

embe

rs a

lway

s w

elco

me.

Campaigns and Mission Reports

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

L. G

runw

aldt

, R. S

chm

idt,

R. K

önig

, C

h. R

eigb

er

Geo

For

schu

ngsZ

entr

um P

otsd

am (

GF

Z)

Div

isio

n I:

Kin

emat

ics

and

Dyn

amic

s of

the

Ear

thT

eleg

rafe

nber

g14

473

Pot

sdam

Sta

tus

SL

R-T

rack

ing

CH

AM

P M

issi

on

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

Sta

tus

•C

HA

MP

is m

ore

than

2 y

ears

in s

pace

. All

syst

ems

are

runn

ing

smoo

thly

. The

scie

ntifi

c in

stru

men

ts -

exc

ept t

he r

adia

l cha

nnel

of t

he a

ccel

erom

eter

- p

erfo

rmno

min

ally

. Sci

entif

ic in

stru

men

ts a

re in

sci

ence

dat

a co

llect

ion

mod

e.

•B

ased

on

the

data

from

the

onbo

ard

GP

S r

ecei

ver

- a

new

cla

ss o

f the

sta

tic lo

ng-w

avel

engt

h gr

avity

fiel

d ha

s be

en c

ompu

ted

(E

IGE

N

mod

els)

. With

the

dat

a co

llect

ed a

nd fu

ture

dat

a se

ts th

e te

mpo

ral v

aria

bilit

y of

the

lon

g-w

avel

engt

h pa

rt b

ecom

es d

etec

tabl

e.

- ac

cura

te g

loba

lly d

istr

ibut

ed a

tmos

pher

ic p

rofil

es (

tem

pera

ture

, hum

idity

) ar

e r

outin

ely

gene

rate

d to

be

assi

mila

ted

in w

eath

er p

redi

ctio

n m

odel

s.

•B

ased

on

the

data

from

the

mag

neto

met

er in

stru

men

ts o

nboa

rd C

HA

MP

acc

urat

ean

d ho

mog

eneo

us m

aps

of th

e E

arth

‘s m

agne

tic fi

eld

are

gene

rate

d.

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

1970

1990

1976

1981

1995

1999

2001

12345G

RIM

2

GR

IM3

GR

IM4-

S4

GR

IM5-

S1

EIG

EN

1980

GR

IM1

2000

1974

Geoid Mean Difference [m]

0

2002

Geo

id D

iffe

ren

ces

to A

ltim

etry

5°

x 5

° B

lock

s

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

Rol

e of

SLR

Dat

a

•G

FZ

orb

it pr

edic

tions

are

bas

ed o

n ep

hem

eris

from

GP

S n

avig

atio

n so

lutio

n an

dth

e m

ore

accu

rate

SLR

dat

a.

•R

outin

ely

used

for

the

valid

atio

n of

the

data

of t

he o

nboa

rd G

PS

rec

eive

r in

PO

D.

•S

LR d

ata

is v

alua

ble

data

for

the

qual

ity c

ontr

ol o

f gra

vity

fiel

d re

cove

ry fr

omC

HA

MP

mic

row

ave

trac

king

dat

a.

Exa

mp

le: o

rbita

l fit

of S

LR d

ata

for

26 1

4-h

CH

AM

P a

rcs

in M

ay, 2

002

Mod

elS

LR-R

MS

[cm

]G

RIM

5-C

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tend

ed *

)(7

0 x

70)

8.6

EIG

EN

-2S

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*)(7

0 x

70)

8.2

EIG

EN

-2S

P(1

20 x

120

)7.

4

*)

GR

IM5-

C1.

exte

nded

= G

RIM

5-C

1 (G

RIM

5-S

1 pl

us t

erre

str.

dat

a) +

2 m

onth

s C

HA

MP

dat

a (c

omb.

mod

el)

**)

EIG

EN

-2S

P =

pre

limin

ary,

iter

ated

ver

sion

of t

he o

ffici

al E

IGE

N-1

S m

odel

(sa

telli

te-o

nly)

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

SLR

-Tra

ckin

g Ju

l. 20

00 -

Sep

t. 2

4, 2

002

C H

A M

P

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

•O

vera

ll tr

acki

ng s

tatis

tics

quite

sat

isfa

ctor

y fo

r th

e C

HA

MP

mis

sion

.

•O

vera

ll tr

acki

ng s

tatis

tics

indi

cate

ade

quat

e ac

cura

cy o

f G

FZ

orb

it pr

edic

tions

.

•S

LR d

ata

play

s an

impo

rtan

t rol

e:

- fo

r th

e ge

nera

tion

of a

ccur

ate

orbi

t pre

dict

ions

,

- fo

r th

e c

ontin

uous

val

idat

ion

of th

e m

icro

wav

e tr

acki

ng s

yste

ms

onbo

ard

the

CH

AM

P s

atel

lite

and

- fo

r th

e qu

ality

con

trol

of g

ravi

ty fi

eld

reco

very

.

= >

co

nti

nu

ed i

nte

nsi

ve S

LR

su

pp

ort

is r

equ

este

d

Sum

mar

y

E R

S -

2

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

L. G

runw

aldt

, F.-

H.

Mas

sman

n, C

h. R

eigb

er

Geo

For

schu

ngsZ

entr

um P

otsd

am (

GF

Z)

Div

isio

n I:

Kin

emat

ics

and

Dyn

amic

s of

the

Ear

thT

eleg

rafe

nber

g14

473

Pot

sdam

Sta

tus

SL

R-T

rack

ing

ER

S-2

Mis

sio

n

E R

S -

2

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

Mis

sio

n S

tatu

s

•E

RS

-2 i

s n

ow

ab

ou

t 7.

5 ye

ars

in o

rbit

.

•In

gen

eral

th

e sa

telli

te a

nd

th

e p

aylo

ad a

re i

n g

oo

d c

on

dit

ion

.

•E

SA

pla

ns

to o

per

ate

ER

S-2

till

mid

of

2004

.

Ro

le o

f S

LR

• S

LR

is

the

seco

nd

ary

trac

kin

g s

yste

m, w

hile

PR

AR

E i

s th

e p

rim

ary

on

e.

• T

he

age

of

the

PR

AR

E g

rou

nd

eq

uip

men

t, a

rep

air

bac

klo

g o

f th

e m

anu

fact

ure

rp

lus

fun

din

g d

iscu

ssio

ns

giv

e S

LR

an

in

crea

sin

g im

po

rtan

ce.

• E

RS

-2 S

LR

tra

ckin

g w

ill b

e re

qu

ired

un

til a

pp

roxi

mat

ely

mid

200

4.

E R

S -

2

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

SL

R D

ata

Qu

anti

ty a

nd

Qu

alit

y

• In

gen

eral

th

e d

ata

amo

un

t (p

asse

s/d

ay)

is o

kay

• C

on

trib

uti

on

of

stat

ion

s ve

ryd

iffe

ren

t

• T

he

dat

a q

ual

ity

is g

oo

d

E R

S -

2

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

E R

S -

2

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

top

D.C

., U

SA

Ach

ieve

d R

esu

lts

Bas

ed o

n S

LR

an

d P

RA

RE

tra

ckin

g d

ata

pre

dic

ted

an

d p

reci

sio

n o

rbit

s h

ave

bee

ng

ener

ated

, wh

ich

are

use

d f

or

•G

eolo

cati

on

of

SA

R d

ata

•A

nte

nn

a st

eeri

ng

•M

issi

on

pla

nn

ing

•In

terf

ero

met

ric

SA

R p

roce

ssin

g (

DE

M,

def

orm

atio

n a

nal

ysis

)•

Sea

su

rfac

e m

on

ito

rin

g•

Ice

mas

s m

on

ito

rin

g•

Hig

h r

eso

luti

on

gra

vity

mo

del

ling

fro

m r

adar

alt

imet

er d

ata

ER

S-2

SL

R a

nd

PR

AR

E d

ata

are

also

in

corp

ora

ted

in

rec

ent

gra

vity

mo

del

s(G

RIM

-5, T

EG

3p)

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

L. G

runw

aldt

, R. S

chm

idt,

R. K

önig

, C

h. R

eigb

er

Geo

For

schu

ngsZ

entr

um P

otsd

am (

GF

Z)

Div

isio

n I:

Kin

emat

ics

and

Dyn

amic

s of

the

Ear

thT

eleg

rafe

nber

g14

473

Pot

sdam

Sta

tus

SL

R T

rack

ing

GR

AC

E M

issi

on

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

•T

he tw

in G

RA

CE

sat

ellit

es a

re 6

mon

ths

in s

pace

. T

he m

issi

on is

in c

omm

issi

onin

gph

ase

in t

rans

ition

to

calib

ratio

n/v

alid

atio

n ph

ase.

•A

ll se

nsor

s an

d in

stru

men

ts -

exc

ept t

he in

tert

ial m

easu

rem

ent u

nit o

n G

RA

CE

-1 -

are

oper

atin

g in

the

scie

nce

data

col

lect

ion

mod

e.

•A

ll sc

ient

ific

inst

rum

ents

(ac

cele

rom

eter

s, s

tar

cam

eras

, GP

S r

ecei

vers

, K-B

and-

Ran

ging

sys

tem

, Las

er R

angi

ng R

efle

ctor

) ar

e pe

rfor

min

g no

min

ally

.

•T

he S

cien

ce D

ata

Sys

tem

tea

ms

at J

PL,

UT

-CS

R a

nd G

FZ

hav

e ge

nera

ted

first

grav

ity fi

elds

bas

ed o

n G

PS

, ac

cele

rom

eter

and

K-B

and-

Ran

ging

dat

a sh

owin

gsi

gnifi

cant

impr

ovem

ents

of

grav

ity fi

eld

mod

ellin

g de

rived

from

sat

ellit

e-o

nly

data

.

•A

t G

FZ

the

gen

erat

ion

of s

tand

ard

GR

AC

E o

rbit

pred

ictio

ns b

ased

on

GP

Sna

viga

tion

solu

tion

and

SLR

dat

a is

ope

ratio

nal i

n au

tom

atic

mod

e (2

pre

dict

s/da

y).

Sta

tus

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

•A

t G

FZ

pre

cise

orb

it pr

edic

tions

are

gen

erat

ed fr

om G

PS

nav

igat

ion

solu

tion

and

SLR

dat

a.

Exa

mp

le: O

rbita

l fit

of p

ositi

ons

from

GP

S n

avig

atio

n so

lutio

n an

d S

LR d

ata

of o

rbit

dete

rmin

atio

n fo

r th

e ge

nera

tion

of o

rbit

pred

ictio

ns o

f G

RA

CE

-A.

Rol

e of

SLR

dat

a

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

•A

t G

FZ

hig

hly

dow

n-w

eigh

ted

SLR

dat

a is

use

d in

PO

D f

or g

ravi

ty f

ield

rec

over

yba

sed

on h

igh-

low

sat

ellit

e-t

o-sa

telli

te tr

acki

ng (

SS

T)

usin

g G

PS

and

low

-low

SS

Tus

ing

K-B

and-

Ran

ging

dat

a fo

r va

lidat

ion

of th

e m

icro

wav

e tr

acki

ng s

yste

ms.

Exa

mp

le: 6

x 1

.5-d

ay a

rcs

for

GR

AC

E-A

&B

in A

pril/

May

afte

r (b

efor

e) fi

rst

grav

ityfie

ld r

ecov

ery

(SLR

dat

a no

t in

clud

ed)

Rol

e of

SLR

dat

a

RM

Saf

ter

befo

re

SLR

(σ

= 5

0 m

)[c

m]

7.6

16.

4

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

GR

AC

E S

LR-T

rack

ing

Mar

.- S

ep. 2

4, 2

002

•T

otal

128

5 pa

sses

(G

RA

CE

-A: 7

04,

GR

AC

E-B

: 581

).

•G

ood

amou

nt o

f da

ta p

er m

onth

and

per

sate

llite

(as

of

Apr

. 200

2 in

gene

ral m

ore

than

100

pas

s/m

onth

)

•U

ntil

Aug

. 200

2 st

rong

er tr

acki

ng o

fG

RA

CE

-A.

•F

irst

time

bala

nced

trac

king

in A

ug.

2002

.

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

•T

otal

25

ILR

S s

tatio

ns.

•O

verv

all s

umm

ary

stat

istic

s sh

owun

bala

nced

tra

ckin

g pe

r st

atio

n fo

rth

e tw

o G

RA

CE

-sat

ellit

es, h

owev

eras

of A

ug. 2

002

stat

istic

sho

wba

lanc

ed t

rack

ing

for

the

maj

ority

of

the

stat

ions

.

GR

AC

E S

LR-T

rack

ing

Mar

.- S

ep. 2

4, 2

002

Inte

rnat

iona

l Las

er R

angi

ng S

ervi

ce -

Gen

eral

Ass

embl

y, O

ctob

er 2

002

Was

hing

ton

D.C

., U

SA

•O

vera

ll tr

acki

ng s

tatis

tics

quite

sat

isfa

ctor

y fo

r th

e G

RA

CE

mis

sion

. Sin

ce A

ug. 2

002

num

ber

of o

bser

vatio

ns fo

r in

divi

dual

spa

cecr

afts

is g

ettin

g ba

lanc

ed.

•O

vera

ll tr

acki

ng s

tatis

tics

indi

cate

ade

quat

e ac

cura

cy o

f G

FZ

orb

it pr

edic

tions

.

•S

LR d

ata

play

s an

impo

rtan

t rol

e:

- fo

r th

e ge

nera

tion

of a

ccur

ate

orbi

t pre

dict

ions

,

- fo

r th

e ca

libra

tion

/val

idat

ion

of th

e m

icro

wav

e tr

acki

ng s

yste

ms

onbo

ard

the

GR

AC

E s

atel

lites

and

- fo

r th

e qu

ality

con

trol

of g

ravi

ty fi

eld

reco

very

.

= >

co

nti

nu

ed i

nte

nsi

ve S

LR

su

pp

ort

is r

equ

este

d

Sum

mar

y

Etalon campaign

Purpose Improvement EOP solutions Improvement GM Improvement station characterization

Time-span April 2001 – April 2002 May 2002 – October 2002

Observations

Results (JCET)LAGEOS LAGEOS + Etalon

----------------------------------------------------------------------

rms x-pole [mas] 0.525 0.488rms y-pole [mas] 0.504 0.506rms LOD [ms] 0.162 0.099

October 2002 =>

Inte

rnat

iona

l Las

er R

angi

ng W

orks

hop

Oct

ober

7-1

1, 2

002

SLR

Per

form

ance

on

TO

PE

X/P

osei

don,

Jaso

n-1

and

GR

AC

E

Tra

ckin

g o

f T

/P a

nd

Jas

on

-1 a

vera

gin

g m

ore

th

at 1

6 p

asse

so

f g

oo

d d

ata

per

day

(15

/day

was

mis

sio

n g

oal

)•

Co

vera

ge

is g

oo

d in

sp

ite

of

clo

se p

roxi

mit

y o

f T

/P a

nd

Jas

on

-1•

Jaso

n-1

LR

A d

esig

n s

up

po

rts

hig

her

pre

cisi

on

SL

R–

Jaso

n-1

: 18

mm

fit

RM

S, 4

mm

pre

cisi

on

, -2

mm

bia

s (2

48 d

ay a

vera

ge)

–T

/P:

24 m

m f

it R

MS

, 7 m

m p

reci

sio

n, -

2 m

m b

ias

(200

day

ave

rag

e)

•S

LR

rem

ain

s a

crit

ical

co

mp

on

ent

of

alti

met

er s

atel

lite

PO

D, f

or

bo

th a

ccu

rate

orb

it c

ente

rin

g a

nd

acc

ura

cy a

sses

smen

t

GR

AC

E-A

an

d G

RA

CE

-B t

rack

ed 3

-4 t

imes

per

day

on

aver

age

•6-

7 cm

SL

R R

MS

co

nsi

sten

t w

ith

exp

ecte

d o

rbit

err

or

usi

ng

GR

AC

Eg

ravi

ty m

od

el–

Ad

equ

ate

for

po

st-f

it o

rbit

qu

alit

y as

sess

men

ts m

ost

day

s

•~

6 cm

Z-b

ias

app

aren

t in

cen

ter-

of-

mas

s o

ffse

t co

rrec

tio

n b

ein

gin

vest

igat

ed

Met

eor

3M /

SA

GE

III I

LR

S M

issi

on

Su

pp

ort

Met

eor

3M /

SAG

E I

II M

issi

on O

verv

iew

IPIE

(R

ussi

a) E

xper

imen

tal R

efle

ctor

Ref

lect

ors:

1 (

glas

s ba

ll)O

rbit:

Sun

syn

chro

nous

(ne

ar p

olar

)In

clin

atio

n: 9

9.64

Ecc

entr

icity

: 0.0

024

Peri

gee:

1,0

12km

Peri

od: 1

05 m

inut

es

The

IL

RS

is p

rovi

ding

acc

urat

eor

bit

data

to

mit

igat

e th

e fa

ilure

of a

n on

-boa

rd G

PS/

GL

ON

ASS

rec

eive

r

Thi

s da

ta is

req

uire

d fo

r ac

cura

teSA

GE

III

sci

enti

fic

resu

lts

Met

eor

3M /

SA

GE

III I

LR

S M

issi

on

Su

pp

ort

Ope

ratio

nal s

uppo

rt b

egan

May

7 2

002

Stat

istic

s th

roug

h 9/

23/2

002:

21 p

artic

ipat

ing

ILR

S st

atio

ns25

4 L

aser

Tra

ckin

g Se

ssio

ns

Lea

ding

Sta

tions

:•

Her

stm

once

ux –

46

sess

ions

• Y

arra

gade

e –

45 s

essi

ons

• M

onum

ent P

eak

– 30

ses

sion

s•

Gra

z –

28 s

essi

ons

• S

an F

erna

ndo

– 23

ses

sion

s•

Sch

elko

vo*

– 65

ses

sion

s

* Sc

helk

ovo

(Rus

sia)

mea

sure

men

ts w

ere

not s

ubm

itted

to I

LR

S bu

t wer

e us

ed f

or o

rbit

dete

rmin

atio

n

ILR

S su

ppor

t ha

s be

en o

utst

andi

ng

Met

eor

3M /

SA

GE

III I

LR

S M

issi

on

Su

pp

ort

Ope

ratio

ns D

ata

Proc

essi

ng C

ente

r: M

CC

-M (

Kor

olev

, Rus

sia)

• D

aily

orb

it de

term

inat

ion

• 24

– h

our

orbi

t pre

dict

ion

• Pr

epar

atio

n of

IR

V s

ets

• D

istr

ibut

ion

of I

RV

S to

par

ticip

atin

g st

atio

ns (

emai

l)

Def

initi

ve O

rbit

Proc

essi

ng C

ente

r: N

ASA

GSF

C

• IL

RS

data

Pro

cess

ed o

n w

eekl

y ba

sis

• 7-

day

arcs

• T

ypic

al o

rbit

accu

racy

< 4

met

ers

Dat

a P

roce

ssin

g

Met

eor

3M /

SA

GE

III I

LR

S M

issi

on

su

pp

ort

Con

clus

ion

Plea

se c

ontin

ue to

reg

ular

ly tr

ack

Met

eor

3M

Tha

nks!

Upcoming Missions

ILR

S M

ee

ting

, 7-1

1 O

cto

be

r 200

2/ W

ash

ing

ton

D.C

.

NA

SDA

-ILR

S-00

07

AD

EOS-

II M

issio

n S

tatu

s

Ma

ki M

AED

A

Flig

ht

Dyn

am

ics

Gro

up

Off

ice

of

Sate

llite

Te

ch

no

log

y, R

ese

arc

h a

nd

Ap

plic

atio

ns

Sate

llite

Miss

ion

Op

era

tion

s D

ep

art

me

nt

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tion

al S

pa

ce

De

velo

pm

en

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ge

nc

y o

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pa

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S M

ee

ting

, 7-1

1 O

cto

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r 200

2/ W

ash

ing

ton

D.C

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SDA

-ILR

S-00

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La

test

Info

rma

tion

of A

DEO

S-II

Lau

nc

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ind

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c 2

002

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nc

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-IIA

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nc

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ite :

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eg

ash

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(So

uth

ern

Isla

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of J

ap

an

)

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ime

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H31

m –

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(UT)

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min

]

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cto

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01:3

1(U

T)Li

ft o

ffL+

988s

ec

sep

ara

tion

of A

DEO

S-II

L+18

55se

cse

pa

ratio

n o

f Fe

dsa

tL+

1960

sec

sep

ara

tion

of W

EOS

L+20

70se

cse

pa

ratio

n o

f µ

-La

bSa

t

L+3.

5H05

:00(

UT)

1st

dist

ribu

tion

of T

IRV

sL+

7.3H

8:50

(UT)

2nd

dist

ribu

tion

of T

IRV

sY+

1da

y10

:00(

UT)

TIR

Vs

with

th

e p

red

ictio

n o

f 1st

ma

ne

uve

rY+

2da

y1s

t o

rbit

ma

ne

uve

r:

ILR

S M

ee

ting

, 7-1

1 O

cto

be

r 200

2/ W

ash

ing

ton

D.C

.

NA

SDA

-ILR

S-00

07

AD

EOS-

II SL

R t

rac

kin

g p

lan

NA

SDA

pro

po

sed

an

d a

cc

ep

ted

th

e fo

llow

ing

op

era

tion

pla

n (

Last

ILR

S m

ee

ting

at

Nic

e)

Laun

ch

Pha

se:

40 d

ays

tra

cki

ng

ca

mp

aig

n a

fte

r la

un

ch

(GLI

is u

nd

er s

afe

ty m

od

e a

void

ing

an

y sig

na

l th

rou

gh

its

ap

ert

ure

.)Ro

utin

e P

hase

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fte

r la

un

ch

ph

ase

, GLI

will

sta

rts

its o

bse

rva

tion

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d s

witc

h o

ver t

o t

he

rou

tine

op

era

tion

th

rou

gh

th

e m

issio

n c

he

ck

ou

t.A

ll st

atio

n m

ust

be

su

spe

nd

ed

lase

r ra

ng

ing

to

th

e A

DEO

S-II

fro

m t

his

ph

ase

, an

d a

lso N

ASD

A w

ill in

terru

pt

de

live

r IR

V s

et

to t

he

sta

tion

at

on

ce

.If

we

ne

ed

mo

re S

LR d

ata

in ro

utin

e p

ha

se, w

e re

qu

est

to

th

e s

pe

cifi

ed

sta

tion

as

an

pa

rtia

l ca

mp

aig

n.

ILR

S M

ee

ting

, 7-1

1 O

cto

be

r 200

2/ W

ash

ing

ton

D.C

.

NA

SDA

-ILR

S-00

07

AD

EOS-

II SL

R t

rac

kin

g p

lan

du

ring

Ro

utin

e P

ha

se

Wh

en

NA

SDA

req

ue

st p

art

ial c

am

pa

ign

to

th

e s

pe

cifi

ed

sta

tion

…

1.N

ASD

A w

ill in

form

to

th

e s

tatio

n d

irec

tory

(vi

a e

-ma

il) a

bo

ut

the

pa

rtia

l ca

mp

aig

n o

ne

mo

nth

be

fore

th

e p

lan

ne

d s

ch

ed

ule

.2.

NA

SDA

will

sen

d T

IRV

s to

th

e s

tatio

n d

irec

tory

via

e-m

ail.

3.A

lso w

ith t

he

TIR

Vs,

NA

SDA

will

sen

d t

he

ava

ilab

ility

sch

ed

ule

of l

ase

rtr

an

smiss

ion

to

th

e A

DEO

S-II.

Sta

tion

s c

an

tra

nsm

it la

ser o

nly

th

isp

erio

d.

4.

Sta

tion

s se

nd

th

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LNP

to N

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A v

ia e

-ma

il o

r CD

DIS

/ED

C s

erv

er.

5.A

ga

in, N

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ill se

nd

TIR

Vs

an

d t

rac

kin

g s

ch

ed

ule

.

ILR

S M

ee

ting

, 7-1

1 O

cto

be

r 200

2/ W

ash

ing

ton

D.C

.

NA

SDA

-ILR

S-00

07

Tra

cki

ng S

che

dul

e (

sam

ple

)

NA

SDA

will

de

live

r th

e in

form

atio

n a

bo

ut

the

sch

ed

ule

of L

ASE

R t

ran

smiss

ion

to

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II lik

e t

his.

Sta

tion

s p

erm

itte

d t

o S

LR o

ut

of t

his

pe

riod

.

AD

EOS-

II SL

R t

rac

kin

g p

lan

du

ring

Ro

utin

e P

ha

se

STA

TIO

N :

NA

SDA

-GU

TSFR

OM

: 20

03/0

2/10

TO :

2003

/02/

17M

AN

EUV

ER T

IME

: 200

3/02

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21:5

6:43

– 2

1:58

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(UTC

)

No

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ME

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ME

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GTH

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RT

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END

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83.

2003

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11 0

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200

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***

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156.

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****

* :

:

:

:

:

:

:

Sta

tion

ma

il fo

rma

t (s

am

ple

:TBD

)

PRESENTATION TO THE ILRS WORKING GROUP

13TH INTERNATIONAL WORKSHOP ONLASER RANGING

OCTOBER 11, 2002WASHINGTON D.C.

BY

K. ELANGO

ISRO TELEMETRY, TRACKING AND COMMANDNETWORK (ISTRAC)

INDIAN SPACE RESEARCH ORGANISATION (ISRO)BANGALORE

INDIA

ISRO HAS LONG EXPERIENCE IN OPERATINGTHE FIRST GENERATION LASER SYSTEM ATKAVALUR, INDIA FOR MORE THAN A DECADE

ISRO CAN REVIVE SLR PROGRAM IN INDIA ANDBECOME PART OF THE GLOBAL SLR NETWORK

ESTABLISHING SLR STATION AT BANGALOREWILL FULFILL THE LONG STANDING GAP IN THESLR NETWORK AT THE INDIAN SUB-CONTINENT

NECESSARY SITE SELECTION CRITERIA WASCARRIED OUT AND NASA TEAM VISITED ANDAPPROVED THE SITE FOR LOCATING A SLRSTATION AT BANGALORE

A DETAILED SITE SELECTION CRITERIA REPORTWAS MADE FOR LOCATING SLR AT BANGALORE

ISRO IS ALREADY PROVIDING TTC SUPPORT TOMULTIPLE REMOTE SENSING SATELLITES USINGITS GROUND STATIONS WITHIN AND OUTSIDEINDIA

NECESSARY INFRASTRUCTURE, EXPERTISE INHARDWARE, SOFTWARE, ROUND THE CLOCKOPERATION, ORBIT DETERMINATION ETC. AREAVAILABLE IN ISRO

ISRO HAS OPERATIONAL EXPERIENCE IN ORBITDETERMINATION/POD FOR MORE THAN TWODECADES

ISRO IS ALSO OPERATING A PRARE STATIONAND A P-CODE GPS RECEIVER AT THE SAMECAMPUS, BANGALORE

BANGALORE CAN BE ELEVATED AS ONE OF THEFUNDAMENTAL REFERENCE STATIONS FORSPACE GEODESY BY LOCATING A SLR STATION

BANGALORE SITE IS ALREADY IN THEINTERNATIONAL SPACE GEODESY NETWORK(SITE NUMBER 7725)

ISRO HAS PROPOSAL TO CONDUCTINTERNATIONAL WORKSHOP ON SPACEGEODESY TO BRING THE EXPERTS ON ACOMMON PLATFORM

ISRO HAS PLANS TO FOSTER SPACE GEODESY ININDIA BY ESTABLISHING A SPACE GEODESYCENTRE. TOWARDS THIS, A GEODESY DIVISIONIS ESTABLISHED RECENTLY

TO GET ACCURATE GROUND IMAGERIES FROMREMOTE SENSING SATELLITES, ISRO HASPROPOSED TO PUT RETROREFLECTORS TO ITSFUTURE IRS MISSIONS

A DETAILED INTERNAL DESIGN REPORT IS MADEIN THIS RESPECT.

SATNAV PROGRAM (INDIAN WAAS) IS JUSTEMERGING OUT IN INDIA WITH BANGALORE ASTHE CONTROL CENTRE

Other Business

8th IL

RS G

ener

al A

ssem

bly

| W

ashi

ngto

n, D

.C.

| O

ctob

er 1

1, 2

002

| 1

ILRS

Ann

ual R

epor

t Se

ries

•20

01 IL

RS A

nnua

l Rep

ort

near

ly f

inis

hed

•Ca

ll fo

r in

put

to 2

002

ILRS

Ann

ual R

epor

t to

be

issu

ed a

fter

fir

st o

f th

e ye

ar•

Plan

s:–

Muc

h sh

orte

r re

port

(le

ss t

han

20 p

ages

tot

al)

–O

ne p

age

per

sect

ion

(add

itio

nal f

or A

WG

rep

ort)

–N

o in

divi

dual

cen

ter

repo

rts

–W

orki

ng g

roup

cha

irs,

net

wor

k co

ordi

nato

rs,

etc.

gene

rate

sum

mar

ies

•Fi

nal r

epor

t co

uld

be u

sed

for

ILRS

inpu

t to

the

CSTG

ann

ual r

epor

t