microgravity acceleration environment of the …...international space station quasi-steady regime...
TRANSCRIPT
3/7/02 MEIT-2002 / Section 19 / Page 1
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Microgravity Acceleration Environment of the International Space Station
Quasi-steady Regime
Eric KellyPIMS Data Analyst
ZIN Technologies / NASA Glenn Research Center
3/7/02 MEIT-2002 / Section 19 / Page 2
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Components of Quasi-steady Environment
• Frequency content: DC to 0.01 Hz • Magnitude typically 5 µµµµg or less.• Three main components of QS Vector
• Aerodynamic Drag - Attitude - Atmospheric density (time and altitude dependent)- ISS Configuration
• Rotational Effects- Attitude- Angular velocity- Position relative to ISS Center of Mass
• Gravity Gradient- Attitude- Position relative to ISS Center of Mass
• Disturbances in the Quasi-Steady Environment• Crew Activity Effects• Air and Water Venting• EVA/SSRMBS Operations• Miscellaneous
3/7/02 MEIT-2002 / Section 19 / Page 3
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Space Station Analysis Coordinate System
• PIMS uses Space Station Analysis Coordinate System (SSA) as a reference to define all its coordinate systems and sensor locations.
• Quasi-steady plots for Increment Reports are generally displayed in SSA coordinates.
• Definition of the SSA coordinate system found in Figure 1. • Taken from SSP 30219, Rev F, “Space Station Reference
Coordinate Systems”.
3/7/02 MEIT-2002 / Section 19 / Page 4
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Torque Equilibrium Attitude
• Torque Equilibrium Attitude (TEA) is an “airplane like” attitude maintained relative to Local Vertical Local Horizontal (LVLH), a rotating coordinate system. (Figure 2)
• +XVV +ZLV, Station X-axis towards velocity vector, station Z-axis towards nadir.
• Actual orientation is dependent on ISS configuration.• For Increments 2 and 3 YPR ≈≈≈≈ (350,350,0).
3/7/02 MEIT-2002 / Section 19 / Page 5
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Plots of Torque Equilibrium Attitude
• Figure 3 is a time series from a TEA period during crew sleep.• Quasi-steady acceleration magnitude about 1-2 µµµµg• Distance from Center of Mass = [49.9 -0.8 2.7] (ft) • Z axis component primarily due to rotational effects
• In Figure 4 the x-axis accelerations for the MAMS location and the ISS CM are nearly identical. This lends support to the theory that in the flight direction of TEA, the gravity gradient component cancels out the rotational component.
3/7/02 MEIT-2002 / Section 19 / Page 6
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
X-axis Perpendicular to Orbital Plane (XPOP)
• ISS orientation is maintained relative to an inertial frame of reference. X-axis is perpendicular to orbital plane (Figure 5).
• Necessary for power generation and Beta Gimbal Assembly life. (BGA rotates the solar arrays)
• Rotational components are small compared to gravity gradient and drag.
3/7/02 MEIT-2002 / Section 19 / Page 7
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Plots from XPOP
• Figure 6 is a time series during crew sleep when the ISS was in XPOP attitude. Y and Z components show cyclical variation as they are alternately subjected to the drag and gravity gradient vectors.
• Comparing the CM location to the MAMS OSS location in Figure 7, it can be seen that the X-direction component is almost completely due to gravity gradient effects.
• X component dominates mean (~2 µµµµg)
• Y and Z vary between ± 1 µµµµg
3/7/02 MEIT-2002 / Section 19 / Page 8
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Effect of Crew Activity•Crew activity masks the quasi-steady vector.
• Crew activity causes increased variation in quasi-steady vector.
•Figure 8: QTH Summary Plot of Crew Active Periods for TEA•Figure 9: QTH of a Compilation of Crew Sleep Periods for TEA•Figure 10: QTH Summary Plot of Crew Active Periods for XPOP•Figure 11: QTH of a Compilation of Crew Sleep Periods for XPOP.
• Without crew effects the characteristic “ring” profile is seen in the YZ plane
3/7/02 MEIT-2002 / Section 19 / Page 9
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Effect of Crew Activity
•Extravehicular Activities (EVA) • EVAs seen to date have many disturbances yet to be characterized.
These disturbances are can be seen in Figure 12 to be on the order of 10-20 µµµµg in the Y and Z axes.
• Dependent on activities performed- Attitude changes- Space Station Remote Manipulator System (SSRMBS or Canadarm)- Airlock depressurization - Crew motion
• Prior to Russian EVA 2 During Increment 3, an SSRMBS maneuver, seen in X and Z axes of Time Series plot in Figure 13.
• DC-1 Airlock depressurization is evident in X axis of Figure 13.
3/7/02 MEIT-2002 / Section 19 / Page 10
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Venting Operations•10.2 Orbiter Cabin Depressurization (Figure 14)
• In preparation for EVA during STS-104 Joint operations
• Cabin pressure dropped from 14.7 psi to 10.2 psi
• Venting in +/- Station X-axis. (Orbiter +/- Z-axis)
• ~4µµµµg disturbance in X-axis, vector magnitude unchanged (Figure 15)
• Venting Operations sometimes accompanying by attitude maneuvers.
• Progress 5P fuel line purge (Figure 16)• Two stages
- fuel purge - oxygen purge
• Attitude hold• 3-4 µµµµg transient disturbances in Y and Z axes.
3/7/02 MEIT-2002 / Section 19 / Page 11
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Vehicle Dockings
• ISS has frequent visitors• Russian Vehicles (Progress and Soyuz) and STS (Shuttle)
• Large disturbances during attitude maneuvers to docking attitude.
• Progress and Soyuz have small Center of Mass change (1-2 ft).• Shuttle has large CM change.
• Grab bag of Vehicle Dockings• Soyuz TM-31 Undocking (Figure 17)
- Attitude change from +XVV/+ZLV to –XVV/+ZLV (180 degree yaw)• Soyuz TM-33 Docking (Figure 18)
- Attitude change to an inertial attitude• STS-104 Docking Event (Figure 19)
- Largest change in Z-axis, approximately ~3.4µg
3/7/02 MEIT-2002 / Section 19 / Page 12
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Docked Operations
•STS-105 Docking/Joint Operations (Figure 20)•Differences in Quasi-steady vector due to increased drag, change in center of mass, new attitude.
• ∆∆∆∆ g = [-1.08 0.85 2.58] µµµµg• ∆∆∆∆grss = 2.87 µµµµg.
• Nominal Attitude • Before docking YPR = (350,351,0). • After docking YPR = (0,23,0).
-21.30.4-36.0Net Difference-19.6-1.317.4STS-105 Joint Ops
Center of mass information from http://sspweb.jsc.nasa.gov/vcdb. For preliminary assessments only.
1.7-1.753.47A Configuration
ZA (ft)YA (ft)XA (ft)Distance to Center of Mass
3/7/02 MEIT-2002 / Section 19 / Page 13
ISS Measured Microgravity Environment –Quasi-steady: Increments 2 and 3
Summary of Quasi-steady Environment Findings for Increments 2 and 3.
Source Effect GMTSoyuz TM-31 Undocking 12 µg peak magnitude in X-axis 06-May-200100:19:58Progress (4P) Docking 10 µg peak magnitude in X, Y-axes 23-May-200100:24:23STS-104 (7A)Docking 6 µg peak magnitude 14-Jul-2001, 3:21:04
STS-105 (7A.1)Docking 5 µg peak magnitude 12-Aug-2001, 19:02STS-105 (7A.1)Undocking 6 µg peak magnitude 20-Aug-2001, 14:5210.2 Cabin DepressuriZtion 2.5 µg peak in X axis 14-Jul-2001, 10:05:00
STS-105 Joint Ops 2.9 µg mean magnitue 12-Aug-2001, 19:02:00Progress 4P Undocking 10-20 µg peak in - X direction 22-August-2001, 234/06:07:00
DC1 Docking 10-25 µg in - X direction 17-September-2001, 260/01:05:00CMG 2 Testing Increased variation on X, Y, and Z axes. 11-October-2001, 283/04:50:00
Soyuz 2 Relocation 8-10 µg peak in - X direction 19-October-2001, 291/07:58:00
EVA Activities 12-18 µg peak in -Y, and -Z directions. 08-October-2001, 281/14:2312-November-2001, 316/21:41
SSRMBS Maneuvers 7-13 µg in the -X, and -Z directions. 08-October-2001, 281/14:23
DC1/PkhO DepressuriZtion 4 µg peak in -X direction 1.5 µg peak in -Y direction
08-October-2001, 281/14:2312-November-2001, 316/02:35
Thrusters Inhibited Recovery 10-20 µg in -X direction for extended period 03-December-2001, 337/13:20Progress 5P Prop Purge 3.5 -5.7 µg in Y, and -Z directions. 20-November-2001, GMT 234/19:10
TEA Attitude -0.80 µg mean in Z axis0.94 µg mean magnitude
Various
XPOP Attitude 1.89 µg mean in X axis
2.05 µg mean magnitude Various
SS
P 30219 R
evision F26 O
ctober 2001
4 – 2
NA
ME
: S
pace Station A
nalysis Coordinate S
ystem
TY
PE
: R
ight–Handed C
artesian, Body–F
ixed
DE
SC
RIP
TIO
N:
This coordinate system
is derived using the Local Vertical Local H
orizontal(LV
LH)
flight orientation.
W
hen defining
the relationship
between
thiscoordinate system
and another, the Euler angle sequence to be used is a yaw
,pitch, roll sequence around the Z
A , YA
, and XA axes, respectively.
OR
IGIN
: T
he origin is located at the geometric center of Integrated Truss S
egment
(ITS
) S0 and is coincident w
ith the S0 C
oordinate frame. S
ee figure 5.0–12,S
0 coordinate frame for a m
ore detailed description of the S0 geom
etriccenter.
OR
IEN
TAT
ION
: X
AT
he X–axis is parallel to the longitudinal axis of the m
odule cluster.T
he positive X–axis is in the forw
ard direction.
YA
The Y
axis is identical with the S
O axis. T
he nominal alpha joint
rotational axis is parallel with Y
A . The positive Y
–axis is in the starboarddirection.
ZA
The positive Z
–axis is in the direction of nadir and completes the
right–handed Cartesian system
.
L, M, N
: Mom
ents about XA
, YA
, and ZA
axes, respectively.
p, q, r: Body rates about X
A, Y
A, and Z
A axes, respectively.
Angular body acceleration about X
A, Y
A, and Z
A axes,
respectively.
SU
BS
CR
IPT:
A
p, q, r:
PIMS ISS Increment-2 Microgravity Environment Summary Report: May to August 2001
Figure 2.2-1 Space Station Analysis Coordinate System
01
23
45
67
−2
−1.5 −1
−0.5 0
0.5 1
1.5 2
Z−Axis Acceleration ( µg)
RMS = 1.1201 µg
Original Mean = − 1.1070 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 10−O
ct−2001,10:06:56.310
−2
−1.5
−1
−0.5 0
0.5 1
1.5 2
Y− Axis Acceleration (µg)
RMS = 0.5267 µg
Original Mean = − 0.5191 µg
−2
−1.5
−1
−0.5 0
0.5 1
1.5 2
X− Axis Acceleration (µg)
RMS = 0.2411 µg
Original Mean = − 0.1954 µg
Start GM
T 07−
May−
2001,22:30:04.122
+Z
LV
+X
VV
Torque E
quilibrium A
ttitudeSSA
nalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
01
23
45
67
8−2
−1.5 −1
−0.5 0
0.5 1
1.5 2
Z−Axis Acceleration ( µg)
OSS Mean = − 0.8031 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 14−Jan−
2002,13:28:17.340
−2
−1.5
−1
−0.5 0
0.5 1
1.5 2
Y− Axis Acceleration (µg)
OSS Mean = − 0.4002 µg
−2
−1.5
−1
−0.5 0
0.5 1
1.5 2
X− Axis Acceleration (µg)
CM Mean = 0.1106 µg
OSS Mean = − 0.2168 µg
Start GM
T 21−
September−
2001, 264/00:00:11.642
Quasi−
Steady Vector at M
AM
S OSS L
ocation and Center of M
ass During T
orque Equilibrium
Attitude
SSAnalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf
OSS L
ocation C
enter of Mass
CM Mean = − 0.1623 µgCM Mean = 0.0095 µg
Orbital Noon
Orbital Midnight
b
Z
Inertial Attitude With The X Principal Axis Perpendicular to Orbit Plane, Z Nadir At Noon
+Z Body Axis Is Down/Nadir At Orbital Noon+X Body Axis Opposite Sun Side Of Orbit Plane(+b = +90 Yaw, -90 Yaw, For Yaw, Pitch, Roll LVLH Euler Sequence)
Sun
Positive Solar BetaAngle Shown
Y
X
(90º Before Orbital Noon)
(90º After Orbital Noon)
01
23
45
67
8−4 −3 −2 −1 0 1 2 3 4
Z−Axis Acceleration ( µg)
RMS = 0.4879 µg
Original Mean = − 0.1573 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 06−Sep−
2001,13:40:53.770
−4
−3
−2
−1 0 1 2 3 4
Y− Axis Acceleration (µg)
RMS = 0.4944 µg
Original Mean = − 0.1652 µg
−4
−3
−2
−1 0 1 2 3 4
X− Axis Acceleration (µg)
RMS = 2.0057 µg
Original Mean = 2.0026 µg
Start GM
T 25−
May−
2001,00:15:07.965
Crew
Sleep Period During X
POP A
ttitudeSSA
nalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
01
23
45
67
8−4 −3 −2 −1 0 1 2 3 4
Z−Axis Acceleration ( µg)
CM Mean = − 0.0113 µg
OSS Mean = − 0.2677 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 11−Jan−
2002,16:15:04.710
−4
−3
−2
−1 0 1 2 3 4
Y− Axis Acceleration (µg)
CM Mean = − 0.0090 µg
OSS Mean =− 0.0004 µg
−4
−3
−2
−1 0 1 2 3 4
X− Axis Acceleration (µg)
OSS Mean = 1.8901 µg
Start GM
T 05−
Novem
ber−2001, 309/22:00:08.236
Quasi−
steady Vector at M
AM
S OSS L
ocation and Center of M
ass During X
POP
SSAnalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf
OSS L
ocation C
enter of Mass
CM Mean = − 0.1293 µg
To consider only com
plete cycles, means calculated w
ith data up until 7:41.
Summary of Quasi−Steady Vector During Torque Equilibrium AttitudeSSAnalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
Time Span = 354.9911 hours0.0625 sa/sec (1.0 Hz)mams, ossbtmf at LAB1O2, ER1, Lockers 3,4:[135.28 10.68 132.12]
from: t:\pub\pad\, $Name: $, 06− Sep− 2001,11:56:23.860
Centroid: Xct = − 0.165 (µg) Yct = − 0.899 (µg) Zct = − 0.862 (µg)
Perc
enta
ge o
f T
ime
0.2
0.4
0.6
0.8
1
1.2
X− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Y− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
X− Axis Accel. (µg)
Y−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Compilation of Sleep Periods During Torque Equilibrium AttitudeSSAnalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
Time Span = 82.8000 hours0.0625 sa/sec (1.0 Hz)mams, ossbtmf at LAB1O2, ER1, Lockers 3,4:[135.28 10.68 132.12]
from: t:\pub\pad\, $Name: $, 06− Sep− 2001,11:56:23.860
Centroid: Xct = − 0.232 (µg) Yct = − 0.888 (µg) Zct = − 0.887 (µg)
Perc
enta
ge o
f T
ime
0
0.2
0.4
0.6
0.8
1
1.2
X− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Y− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
X− Axis Accel. (µg)
Y−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Compilation of Quasi−Steady Vector During XPOP AttitudeSSAnalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
Time Span = 375.9867 hours0.0625 sa/sec (1.0 Hz)mams, ossbtmf at S0, Geom. Ctr. ITA:[135.28 − 10.68 132.12]
from: t:\pub\pad\, $Name: $, 06− Sep− 2001,11:56:23.860
Centroid: Xct = +1.954 (µg) Yct = − 0.451 (µg) Zct = − 0.297 (µg)
Perc
enta
ge o
f T
ime
0
0.05
0.1
0.15
0.2
0.25
0.3
X− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Y− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
X− Axis Accel. (µg)
Y−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Compilation of Crew Sleep Periods During XPOP AttitiudeSSAnalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
Time Span = 74.2622 hours0.0625 sa/sec (1.0 Hz)mams, ossbtmf at S0, Geom. Ctr. ITA:[135.28 −10.68 132.12]
from: t:\pub\pad\, $Name: $, 06− Sep− 2001,11:56:23.860
Centroid: Xct = +1.984 (µg) Yct = − 0.364 (µg) Zct = − 0.248 (µg)
Perc
enta
ge o
f T
ime
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
X− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Y− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
X− Axis Accel. (µg)
Y−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
01
23
45
67
89
1011
−18
−12 −6 0 6 12 18
Z−Axis Acceleration ( µg)
RMS = 4.3232 µg
Original Mean = − 2.7741 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 28−D
ec−2001,14:41:56.860
−18
−12
−6 0 6 12 18
Y− Axis Acceleration (µg)
RMS = 2.6767 µg
Original Mean = − 1.5075 µg
−18
−12
−6 0 6 12 18
X− Axis Acceleration (µg)
RMS = 0.7467 µg
Original Mean = − 0.3188 µg
Start GM
T 08−
October−
2001, 281/12:00:10.369
Russian E
VA
, RS−
EV
A−
2SSA
nalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
EV
A D
uration
020
4060
80100
120140
−16
−12 −8 −4 0 4 8 12 16
Z−Axis Acceleration ( µg)
RMS = 4.8957 µg
Original Mean = − 3.2999 µg
Tim
e (minutes)
from: t:\pub\pad\, $N
ame: $, 28−
Dec−
2001,14:37:07.570
−16
−12
−8
−4 0 4 8 12 16
Y− Axis Acceleration (µg)
RMS = 3.0733 µg
Original Mean = − 1.8416 µg
−16
−12
−8
−4 0 4 8 12 16
X− Axis Acceleration (µg)
RMS = 0.7890 µg
Original Mean = − 0.3127 µg
Start GM
T 08−
October−
2001, 281/12:00:10.369
SSRM
S Maneuver and D
C1 D
epressurization in Preparation for RS−
EV
A−
2SSA
nalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
SS
RM
S M
aneuver
DC
1/PkhO
Depressurization
00.5
11.5
22.5
33.5
−4 −3 −2 −1 0 1 2 3 4
Z−Axis Acceleration ( µg)
RMS = 2.5253 µg
Original Mean = 2.4784 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 10−Sep−
2001,15:15:40.430
−4
−3
−2
−1 0 1 2 3 4
Y− Axis Acceleration (µg)
RMS = 0.5199 µg
Original Mean = − 0.3333 µg
−4
−3
−2
−1 0 1 2 3 4
X− Axis Acceleration (µg)
RMS = 1.5137 µg
Original Mean = − 1.0118 µg
Start GM
T 14−
Jul−2001,08:00:14.645
10.2 Orbiter C
abin Depressurization D
uring STS−
104SSA
nalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
0 0.5 1 1.5 2 2.5 3 3.5 40
1
2
3
4
5
6A
ccel
erat
ion
Vec
tor
Mag
nitu
de (
µg)
RM
S =
2.9
897
µgM
ean
= 2
.970
7 µg
Time (hours) from: t:\pub\pad\, $Name: $, 17−Sep−2001,15:57:54.360
Start GMT 14− Jul− 2001,08:00:14.64510.2 Orbiter Cabin Depressurization During STS− 104
Vector MagnitudeIncrement: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)mams, ossbtmf at LAB1O2, ER1, Lockers 3,4:[135.28 − 10.68 132.12]
00.5
11.5
22.5
33.5
4−10 −5 0 5 10
Z−Axis Acceleration ( µg)
RMS = 1.7905 µg
Original Mean = − 1.2287 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 31−D
ec−2001,14:26:24.120
−10
−5 0 5 10
Y− Axis Acceleration (µg)
RMS = 0.8510 µg
Original Mean = − 0.4620 µg
−10
−5 0 5 10
X− Axis Acceleration (µg)
RMS = 0.5568 µg
Original Mean = − 0.2678 µg
Start GM
T 20−
Novem
ber−2001, 324/18:00:03.569
Progress 5P Propellant Line Purge
SSAnalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
Attitude
hold
Begin O
xygen Purge
Begin F
uel Purge
Mom
entum M
anagement
00.5
11.5
22.5
33.5
44.5
5−25
−20
−15
−10 −5 0 5 10 15 20 25
Z−Axis Acceleration ( µg)
RMS = 2.5002 µg
Original Mean = − 1.4522 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 17−Sep−
2001,08:43:32.600
−25
−20
−15
−10
−5 0 5 10 15 20 25
Y− Axis Acceleration (µg)
RMS = 2.3141 µg
Original Mean = − 0.7918 µg
−25
−20
−15
−10
−5 0 5 10 15 20 25
X− Axis Acceleration (µg)
RMS = 3.8516 µg
Original Mean = − 1.3318 µg
Start GM
T 2001:125:23:00:00.805
Soyuz TM
−31 U
ndockingSSA
nalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
+XV
V/+Z
LV − X
VV
/+ZLV
+XV
V/+Z
LV
00.5
11.5
22.5
33.5
−20
−15
−10 −5 0 5 10 15 20
Z−Axis Acceleration ( µg)
RMS = 4.2707 µg
Original Mean = − 1.1879 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 31−D
ec−2001,12:32:10.410
−20
−15
−10
−5 0 5 10 15 20
Y− Axis Acceleration (µg)
RMS = 3.0118 µg
Original Mean = − 0.5724 µg
−20
−15
−10
−5 0 5 10 15 20
X− Axis Acceleration (µg)
RMS = 3.1023 µg
Original Mean = − 0.7135 µg
Start GM
T 23−
October−
2001, 296/08:00:07.886
Soyuz TM
−33 D
ocking SSA
nalysis[ 0.0 0.0 0.0]
Increment: 3, Flight: 7A
.1
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
Maneuver to
docking attitude M
aneuver to X
PO
P attitude
Soyuz T
M−33 docking
01
23
45
67
−6 −4 −2 0 2 4 6
Z−Axis Acceleration ( µg)
RMS = 2.1603 µg
Original Mean = 0.3050 µg
Tim
e (hours)from
: t:\pub\pad\, $Nam
e: $, 17−Sep−
2001,10:03:51.430
−6
−4
−2 0 2 4 6
Y− Axis Acceleration (µg)
RMS = 1.6303 µg
Original Mean = − 0.7183 µg
−6
−4
−2 0 2 4 6
X− Axis Acceleration (µg)
RMS = 6.4219 µg
Original Mean = − 1.0389 µg
Start GM
T 13−
Jul−2001,22:00:00.512
STS−
104 Docking E
ventsSSA
nalysis[ 0.0 0.0 0.0]
Increment: 2, Flight: 6A
0.0625 sa/sec (1.0 Hz)
mam
s, ossbtmf at L
AB
1O2, E
R1, L
ockers 3,4:[135.28 −10.68 132.12]
Man
euver to
Do
cking
Attitu
de
Man
euver to
TE
A
Start GMT 12−Aug−2001,19:00:01.578Summary of Quasi−Steady Vector during STS−105 Joint Operations
SSAnalysis[ 0.0 0.0 0.0]Increment: 2, Flight: 7A
Time Span = 187.5022 hours0.0625 sa/sec (1.0 Hz)mams, ossbtmf at LAB1O2, ER1, Lockers 3,4:[135.28 10.68 132.12]
from: t:\pub\pad\.test\, $Name: $, 10− Sep− 2001,10:20:00.700
Centroid: Xct = − 1.244 (µg) Yct = − 0.049 (µg) Zct = +2.578 (µg)
X− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Y− Axis Accel. (µg)
Z−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
X− Axis Accel. (µg)
Y−
Axi
s A
ccel
. (µg
)
− 4 − 2 0 2 4− 4
− 3
− 2
− 1
0
1
2
3
4
Perc
enta
ge o
f T
ime
0
0.2
0.4
0.6
0.8
1
1.2
1.4