2002 Data Collection
SABER became operational on January 8, 2002, and remained in Data Collection (DC) mode during 2002 except for the periods noted below.
- December 9, 2001 - SABER Powered on and Aliveness Test completed successfully.
- December 13, 2001 - SABER first MemDump completed successfully.
- December 30, 2001 - SABER Partial Functional Test completed successfully.
- January 3 - SABER cover released and verified.
- January 6 - SABER cooler turned on for the first time.
- January 8 - SABER adaptive scan enabled and SABER officially begins data-collection(DC). Adaptive scan set at 1.5 degrees below and 5 degrees above the 1/2 peak power point of the narrow band CO2 channel.
- January 14-17 - TIMED demoted to SAFE after unsuccessful Yaw attempt.
- 14 Jan 17:40 - TIMED demoted to SAFE.
- 17 Jan 00:50 - SABER returns to DC.
- January 23 - Added the Automatic Detector Offset Adjustment routine to the nominal scanning sequence to eliminate the need for daily detector offset adjustments.
- January 24 - Adaptive scan upper offset changed from 5 degrees to 7 degrees above the 1/2 peak power point of the narrow band CO2 channel. This effectively increases the top of scan to 350 km.
- January 27 - February 1 - TIMED and SABER developed, implemented, and tested new Sun Pointing Safe Hold on-board software. In the new software, the SABER instrument will stow the scan mirror in the home position and wait for any new operator commands, but it does not remove power from the cryo-cooler. Previously, SABER would execute an instrument shutdown procedure which immediately removed power from the cryo-cooler.
- January 30 - February 1 - Modified the Automatic Detector Offset Adjustment routine to raise each detector's offsets well above anticipated science channel drift that could cause signal cut-off between routines.
- March 1-4 - TIMED demoted to SAFE.
- 1 Mar 14:25 - TIMED demoted to SAFE.
- 4 Mar 00:35 - SABER returns to DC.
- March 19 - TIMED demoted to SAFE after unsuccessful Yaw attempt.
- 19 Mar 15:05 - TIMED demoted to SAFE.
- 19 Mar 20:10 - SABER returns to DC.
- March 29 - TIMED demoted to SAFE at 00:05.
- 29 Mar 00:05 - TIMED demoted to SAFE.
- 29 Mar 20:10 - SABER returns to DC.
- May 10-14 - Cooler Power Cycle
- 10 May 19:45 - Command sent to disable the adaptive scan and turn off the cryo-cooler.
- 13 May 19:00 - Command sent to turn the cryo-cooler back on.
- 14 May 19:20 - Command sent to re-enable adaptive scan and restart nominal DC.
- May 21-31 - TIMED performs multiple roll maneuvers for SABER off-axis calibration.
- 29 May 08:10 - 09:15 - Spacelook baseline unplanned data loss in channels 4 and 5.
- July 19-23 - Cooler Power Cycle
- 19 Jul 15:40 - Command sent to disable the adaptive scan and turn off the cryo-cooler.
- 22 Jul 15:00 - Command sent to turn the cryco-cooler back on.
- 23 Jul 15:15 - Command sent to re-enable adaptive scan and restart nominal DC.
- September 24-25 - Cooler Power Cycle
- 24 Sep 03:35 - Command sent to disable the adaptive scan and turn off the cryo-cooler.
- 24 Sep 16:00 - Command sent to turn the cryco-cooler back on.
- 25 Sep 16:05 - Command sent to re-enable adaptive scan and restart nominal DC.
- December 2-4 - Cooler Power Cycle
- 2 Dec 14:30 - Command sent to disable the adaptive scan and turn off the cryo-cooler.
- 3 Dec 13:05 - Command sent to turn the cryco-cooler back on.
- 4 Dec 13:25 - Command sent to re-enable adaptive scan and restart nominal DC.
- December 10-11 - SABER executes "undocumented feature" at 13:45 while performing a memdump and restarts in the power-up routine. Nominal DC mode restored at 05:25.
Click here for a list of each command sent in 2002 along with a short description of that command's purpose.
2002 Operational Changes
Operational changes made to SABER in 2002 are noted below:
- The number of mirror-full-scans was upped from 1 to 2 times per Data Collection sequence
- The frequency of performing an offset adjustment routine was increased from once every 2.5 hours to once every 0.5 hours, then changed back
- (Dec. 5, 2002) The memory dump, and any other interrupt routines that involve running from EEPROM, are now required to return to the Offset Adjustment routine after execution to avoid accidentally executing an improper portion of memory
2002 Trends
Trended parameters are divided into three sections:
- Housekeeping - plotted parameters directly related to health and monitoring
- Responsivity - responsivity levels plotted for channels 1-10
- Scan Mirror - plot of scan mirror behavior for 2002
Coverage
The plot below shows the dates of TIMED Yaws, and the latitudes between which SABER observed during those Yaws
The small picture below shows the orientation of SABER on TIMED, and the latitudes observed in +X and -X travel
2002 Commanding
The breakdown of commands sent to SABER in 2002 is as follows:
| Command Type | Number of commands |
|---|---|
| Diagnostics or Testing | 5 |
| Memory Dump | 9 |
| Power-Up | 3 |
| Health and Maintenance | 41 |
| Operational Change | 20 |
| Total: | 78 |
For a list of each command sent in 2002 along with a short description of that command's purpose, click here.
2002 Limit Violations
During the year of 2002, there were no reported Red limit violations.