gmv solution for satellite constellation operations...

September 2004

www.gmv.com

GMV Solution for Satellite Constellation Operations (focusCn)

A. Pérez, M.A. Molina, F. Martínez (GMV S.A.)

2nd ESA Workshop on Astrodynamics Tools and Techniques

ESTEC 13-15 September 2004

GMVSA 4119/04

FOCUSCN

September, 2004© GMV S.A.

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Presentation Contents

Presentation Contents

focusCn General DescriptionfocusCn Computational LayerfocusCn infrastructure :

General descriptionTools

Demo

September 2004

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focusCn General Description

FOCUSCN


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focusCn General Description (1)

General DescriptionfocusCn is an integrated application that provides full life cycle support of satellite constellations.

It provides a collection of mission independent and mission dependent functionalities.

Computational layer is based on the extensive reuse of existing operational flight dynamics systems.

focusCn inherits GMV’s vast experience with constellations flight dynamics software packages.

focusCn uses GUI advance widgets and and generic tools from focusSuite.

September 2004

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focusCn Computational Layer

FOCUSCN


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focusCn Computational Layer (1)

NAPEOS (NAvigation Package for Earth Observation (or Orbiting) Satellites)

Requirements on Precise Orbit Determination (POD)Functionalities: orbit determination, events generation, manoeuvre planning and calibration,...Operational requirements

NAPEOS targeted to multi-satellite applications (GPS, GLONASS,

Galileo )ESOC / GMV project since 1995

FD version (Envisat operational and POD)

Enhanced version (GPS IGS, POD, LEO)New modules developed for GSTBV2 and EPS will be reused.


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focusCn Computational Layer (2)

focusCn inherits from ORION:

Constellation design Optimisation

Performance Calculation

Orbit Control Design

Replacement strategy

Orbit determination strategy

Launch and set-up

End of Life

September 2004

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focusCn infrastructure

FOCUSCN


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General Description (1)

º Focus Constellation Data Analysis Display

Stations Locations Ground Tracks

File Edit Zoom Projection

LoadingStatus:-2.1Longitude:+42.5Latitude:

V-DOP H-DOP

173%

Stations

Constellation

Yarragadee

San Fernando

Monument Peak

Satellites

Sky-1Sky-2

Sky-3

Antartica

New York

Guadalajara

Locations

SA Anomaly

ConicalProjection:

Focus Constellation Data Analysis Display

Stations Locations Ground Tracks

File Edit Zoom Projection

ReadyStatus:10.1Longitude:0.5Latitude:

Stations

Constellation

YarragadeeSan FernandoMonument Peak

Satellites

Sky-1Sky-2Sky-3

AntarticaNew YorkGuadalajara

Locations

V-DOP H-DOP

SA Anomaly

100%

CylindricalProjection:

V-DOP

Latitude:

time (days from epcoh)

VDO

P

21 3 4 5 6 7 21 3 4 5 6 7 21 3 4 5 6 7 21 3 4 5 6 7 21 3 4 5 6 7

Epcoh: 2000/01/05-00:00:00

OK Help

< Back

0.5

Longitude: 10.1

ManoeuvreCd Calb CirCr c.p.r. TransponderState

TNW Geocentric

SKY-1

fwswwfn

SKY-1

snnftst

SKY-1

t

100000.000

typeepoch

SKY-1

fwswwfn

SKY-1

snnftst

SKY-1

t

100000.000

typeepoch

1500.000SKY-1

fw

1500.000 1.000 1500.000 1.000

swwfn

SKY-1

sn

1500.000 1.000 1500.000 0.001

nftst

SKY-1

t

2000/01/01-00:00:00.000 100000.000

type

SKY-1

epoch

Impulsive

Multi-satellite, multi-user

Undo/Redo capabilities

Portability (UNIX/Linux/Windows)

Advance MMI

On-line help

No licenses of external products are needed


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An advanced MMI: The MMI integrates advanced widgets and a design philosophy based on commercial desktop applications for the office: “everything-in-one-working-area” and “all-one-click-away”(tabs). The MMI implementation is based on a proprietary toolkit called TkForms (based on tcl/tk) that allows a development through configuration files rather than through code.


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Operations LAN

InternalRouter

Firewall

PocusStand-by

FocusPrime

Focus Client

Internet

SSH Server

Focus Client

Focus Client

ExternalRouter

Focus Client

Focus Client

Router

IP filteringUser Authentication

EncryptionCompressionConnection

TCP/XML

A client/server architecture: All data and functionalities reside on a server which is accessed via a client MMI. Communications between client and server are done via TCP/IP. The possibility to work over the Internet with the appropriate degree of security has been foreseen.


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ground stations

satellite, thrusters &plume-impignement

measurements imp. MPFs

orbit file

input

input

input

initial state

Proximorbit file 2

state vectors + Cr

input

imp. calibrated manoeuvres

geopotential system parameters

events.ebr

residuals.plt

orbit.plt

proxim.plt

Inclon

Solong

inclon.plt

solong.plt

Db mgr

input

input

input

steering

imp. MPFs

measurements

initial state

imp. calibratedmanoeuvres

imp. manoeuvres

Info

input

Simrad

Gordam

Sorbam

Calib

Database driven: All important mission data is stored in a database residing on the server side. In the standard version of Focus the relational database has been implemented as a set of standard ASCII files. Interface between the database and the Computation Layer is done though a dedicated API, in such a way that the database data can be easily ported to a commercial relational database system (RDBMS) such as ORACLE.


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The Computation Layer is the bridge between user and data services. It responds to requests from the user (or other computation processes) in order to execute a process. This protocol insulates the user from direct interaction with the database. Two different types of processes are included in this layer

The Process Manager is a single process, receiving requests from the clients and starting and controlling the computation processes.The Computation Processes are multiple processes that can run concurrently and perform the computations needed by the system.

omputation Layer

IFrontEnd

Adapter

Process Manager Interface Pure C

DBAP

Process Manager


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The Data Layer maintains, accesses, and updates data. It also manages and satisfies requests to manipulate data that are initiated by computation processes. Separation of data services allows the data structure and access mechanisms to be maintained, modified, or, if necessary, even redesigned without affecting the computation or user layer. Two different single processes running permanently can be identified in this layer

The Database API Back-end handles all the requests received from the computation processesThe Relational database (RDBMS).

DBAPIBackEnd

RDBMS

ODBC


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Advanced graphical capabilities: Dedicated widgets for generic X-Y plots (focusGrafos) and Events visualization (focusEbro) have been developed.


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focusSuite Tools (1)

Autofocus (Operations Automation)

It allows fully automate

focusCn for hand-off operations.

It is fully compatible with today’s operations based on procedures.

It handles procedures written

in SoL (Spacecraft operations

language). SoL is a very high-level language specially targeted towards spacecraft operations which does not require any previous programming experience.


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focusServerAdministratorIt allows to synchronize remote servers (archive and restore data).

It allows to configure user accounts and scenarios and workspaces.

focusEvelogIt allows centralized management of events, management of alarms, errors and warnings


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Laptop computer Hand held computer Cell phone

Local focusSuiteClients

focusSuite Server

Internet

Remote focusSuite Clients

focusRemoteIt provides access to focusCn from the internet.

Operational feature: two way synchronization between local data and operational data

Internet OperationalOrbital Data

User 1 User 3User 2

TLEs

Ephemeris /State Vector + Manoeuvres

CollisionRisk

AssessmentReport

focusCLoseApIt allows to control the risk of collision with uncontrolled space objects.

The orbital elements of the third-party objects are retrieved from the internet in the form of TLE’s.


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VisualfocusIt allows to monitor any kind of satellite in any kind of mission.

It is composed of:

2D Visualization tool

3D Visualization tool

Sensor View tool

It is able to work in two time modes:

Real-Time mode

Stand-alone playback mode

September 2004

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DEMO

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gmv solution for satellite constellation operations...

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