| Component |
Description |
Status |
| ESA |
Earth Sensor Assembly |
Green |
| GYRO 1 |
Gyroscopic Rate Measuring Device #1 (YA, ZA) |
Green |
| GYRO 2 |
Gyroscopic Rate Measuring Device #2 (XA, ZB) |
Orange |
| GYRO 3 |
Gyroscopic Rate Measuring Device #3 (XB, YB) |
Yellow |
| IMU |
Inertial Measurement Unit |
Green |
| PTC 1A |
Pitch Torque Coil 1A |
Green |
| PTC 1B |
Pitch Torque Coil 1B |
Green |
| PTC 2A |
Pitch Torque Coil 2A |
Green |
| PTC 2B |
Pitch Torque Coil 2B |
Green |
| RWA S |
Skew Reaction Wheel Assembly |
Green |
| RWA X |
X-axis Reaction Wheel Assembly |
Green |
| RWA Y |
Y-axis Reaction Wheel Assembly |
Green |
| RWA Z |
Z-axis Reaction Wheel Assembly |
Green |
| RYTC 1A |
Roll-Yaw Torque Coil 1A |
Green |
| RYTC 1B |
Roll-Yaw Torque Coil 1b |
Green |
| RYTC 2A |
Roll-Yaw Torque Coil 2A |
Green |
| RYTC 2B |
Roll-Yaw Torque Coil 2B |
Green |
| SSA |
Sun Sensor Assembly |
Green |
| Date |
Time |
Component |
Description |
| 08/11/2014 |
20:30 |
|
Clear Consistency Flag |
| 01/25/2012 |
19:53:53 |
|
End GYROLESS test |
| 01/24/2012 |
18:53:14 |
|
Start GYROLESS test |
| 11/30/2011 |
20:49:52 |
|
End GYROLESS test |
| 11/29/2011 |
14:49:10 |
|
Start GYROLESS test |
| 03/15/2010 |
16:53:06 |
|
Set RYC to use primary coil |
| 03/11/2010 |
19:51:30 |
|
Pitch Wheel Bias set to 2500 RPM to enhance RGYRO performance (Non-Control SCP) |
| 03/11/2010 |
19:51:00 |
GYRO 2 |
Pitch Wheel Bias set to 2500 RPM to enhance RGYRO performance (Non-Control SCP) |
| 03/11/2010 |
01:41:16 |
|
Pitch Coil Swap to Back-up |
| 03/11/2010 |
01:28:36 |
RWA Z |
Pitch Wheel Bias set to 1300 RPM to enhance RGYRO performance (Control SCP) |
| 03/11/2010 |
01:25:55 |
RWA Z |
Pitch Wheel Bias set to 1300 RPM (Non-Control SCP) |
| 03/10/2010 |
23:49:54 |
|
Reduced gyro estimate X, #2 Gryo Off |
| 03/10/2010 |
23:47:29 |
|
Disable Thrusters |
| 03/08/2010 |
01:45:56 |
|
automatic switch to YGC |
| 06/04/2009 |
17:08:00 |
|
Enables Auto Thruster Firings for both CPUs |
| 06/04/2009 |
17:07:00 |
|
Change gas unloading threshold for pitch axis momentum from 40 in/lbs/sec to 45 in/lbs/sec for both CPUs |
| 06/30/2006 |
12:00:00 |
RWA Z |
Z-reaction wheel transition toward positive values reversed. Trending back toward negative values. Wheel continues sticking as it passes through 0 RPM. |
| 06/17/2006 |
12:00:00 |
RWA Z |
Whenever the Z-wheel speed passes through 0 RPM, in either direction, the wheel sticks for up to several minutes impacting pitch precision. Expect transition to full positive values on or about 5 Jul 06. |
| 06/01/2006 |
12:00:00 |
RWA Z |
Z-reaction wheel (pitch) transitioning from a negative direction to a positive direction (for the first time ever). Pitch torquer coil intervention no longer required. |
| 06/03/2004 |
18:25:00 |
|
Revised Mag. torquer constants to non control SCP |
| 04/22/2004 |
18:20:00 |
|
Reduced gyro testing completed. Estimating all 3 axis successfully tested. |
| 04/22/2004 |
16:45:00 |
|
Command ADACS to nominal mode. |
| 04/22/2004 |
16:40:00 |
|
Ends estimate yaw-pitch test |
| 04/22/2004 |
13:20:00 |
|
Preparatory commands for Yaw-Pitch estimate Rgyro test. |
| 04/22/2004 |
13:20:00 |
|
Ends estimate yaw test |
| 04/21/2004 |
12:03:00 |
|
Preparatory commands for Yaw Estimate Rgyro test |
| 04/20/2004 |
23:46:00 |
|
Ends roll-pitch test |
| 04/20/2004 |
22:05:00 |
|
Preparatory commands for Roll-Pitch estimate Rgyro test |
| 04/20/2004 |
17:25:00 |
|
End estimate roll test |
| 04/19/2004 |
22:30:00 |
|
Ends estimate pitch test |
| 04/19/2004 |
16:05:00 |
|
Preparatory commands for pitch estimate and roll estimate Rgyro tests |
| 04/19/2004 |
16:00:00 |
|
Start Reduced gyro testing series. Pointing precision during testing may be impacted. Testing is day shift (eastern time) 19, 20 and 22 Apr. 24 hour test on 21 Apr. |
| 10/15/2003 |
19:40:00 |
|
Command N15 back to NOMINAL attitude control mode, test complete. |
| 10/15/2003 |
16:15:00 |
|
Command N15 to YGC mode for baseline performance test. |
| 03/15/2002 |
20:00:00 |
GYRO 3 |
Gyro 3 Turned OFF-test complete |
| 03/11/2002 |
16:45:00 |
GYRO 3 |
Gyro 3 Turned ON for data gathering purposes |
| 10/10/2001 |
16:45:00 |
|
Placed spacecraft back into normal ADACS mode |
| 10/09/2001 |
13:51:00 |
|
Forced spacecraft into YGC mode |
| 06/26/2000 |
00:00:00 |
GYRO 3 |
Gyro 3 powered off because of erratic readouts. |
| 05/13/1998 |
16:24:00 |
PTC 2A |
On Orbit |
| 05/13/1998 |
16:24:00 |
GYRO 3 |
On Orbit |
| 05/13/1998 |
16:24:00 |
IMU |
On Orbit |
| 05/13/1998 |
16:24:00 |
RYTC 1B |
On Orbit |
| 05/13/1998 |
16:24:00 |
PTC 1A |
On Orbit |
| 05/13/1998 |
16:24:00 |
GYRO 1 |
On Orbit |
| 05/13/1998 |
16:24:00 |
PTC 1B |
On Orbit |
| 05/13/1998 |
16:24:00 |
PTC 2B |
On Orbit |
| 05/13/1998 |
16:24:00 |
GYRO 2 |
On Orbit |
| 05/13/1998 |
16:24:00 |
RWA S |
On Orbit |
| 05/13/1998 |
16:24:00 |
RWA X |
On Orbit |
| 05/13/1998 |
16:24:00 |
RWA Y |
On Orbit |
| 05/13/1998 |
16:24:00 |
RYTC 1A |
On Orbit |
| 05/13/1998 |
16:24:00 |
RYTC 2A |
On Orbit |
| 05/13/1998 |
16:24:00 |
RYTC 2B |
On Orbit |
| 05/13/1998 |
16:24:00 |
SSA |
On Orbit |
| 05/13/1998 |
16:24:00 |
ESA |
On Orbit |
| 05/13/1998 |
16:24:00 |
RWA Z |
On Orbit |
