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.
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