| Date |
Time |
Component |
Description |
|
| 10/18/2005 | 16:30:00 | SCAN MOTOR | AVHRR scan motor current significantly improved over past several days as is synch delta values and imagery. No bar coded images since 12 Oct. Status upgraded to YELLOW. |
|
| 10/06/2005 | 03:00:00 | SCAN MOTOR | AVHRR scan motor current spiking and causing intermittent imagery bar codes again. Imagery clears up with each MIRP Rephase enable operation, executed once per orbit over the south pole but frequently returns a few minutes later. This is a chronic problem with this payload. |
|
| 10/03/2005 | 14:00:00 | SCAN MOTOR | N16 AVHRR scan motor current significantly improved as are synch delta values. Imagery bar codes ceased. |
|
| 09/29/2005 | 16:00:00 | SCAN MOTOR | N16 AVHRR downgraded to RED status because of elevated scan motor currents and persistent bar coded imagery. |
|
| 09/24/2005 | 18:00:00 | SCAN MOTOR | AVHRR scan motor current higher and less stable. Imagery bar codes starting to intermittently appear. Imagery clearing up with each MIRP Rephase enable operation, executed once per orbit over the south pole. |
|
| 09/01/2005 | 19:30:00 | SCAN MOTOR | AVHRR Bar code imagery started on 31 Aug at 01:15z and persisted through a manual" MIRP rephase enable command at WCDA on 1 Sept at 19:30Z. Cause of bar code persistence: MIRP rephase enable commands (usually executed out of stored commands once per orbit over the South Pole) were omitted from stored command table starting 30 Aug. To be reinserted 2 Sept." |
|
| 06/29/2005 | 07:00:00 | SCAN MOTOR | AVHRR bar coded imagery occurred for the first time since 22 May 05 in conjunction with scan motor current exceeding 280 mAmps. Cleared up after MIRP rephase over South Pole approximately 25 minutes later and a reduction in scan motor current belwo 280. |
|
| 05/22/2005 | 17:45:00 | SCAN MOTOR | AVHRR scan motor surged to 310 mAmps causing bar coded imagery for the first time since early August 2004. Imagery cleared after MIRP rephase occured over south pole on next orbit. |
|
| 10/23/2004 | 12:00:00 | SCAN MOTOR | AVHRR scan motor current became elevated. Synch deltas also quickly runup to pegged" after each rephase over south pole. Imagery degraded (waves) but no bar codes as yet." |
|
| 10/01/2004 | | SCAN MOTOR | AVHRR Scan motor current improved back to pre-anomalous values, synch deltas also nominal. Imagery clear |
|
| 06/04/2004 | 20:00:00 | SCAN MOTOR | AVHRR scan motor current, synch delta and imagery continues to have wide fluctuations in quality. Highly variable and unpredictable. |
|
| 05/19/2004 | 12:01:00 | | Enable MIRP rephasing for 10 seconds out of stored commands each orbit over the south pole to reduce percentage of bar coded imagery. |
|
| 04/27/2004 | 14:00:00 | | Begin implementing intermittent manual" MIRP rephasing when AVHRR bar coded imagery is apparent to clean up the images. " |
|
| 03/20/2004 | 18:50:00 | SCAN MOTOR | Scan motor intermittent current surges similar to 16Mar04 profile resumed. Most images showing bar codes. |
|
| 03/18/2004 | 03:40:00 | SCAN MOTOR | AVHRR Scan motor broke through an apparent obstruction. Quick surge in motor current and temp, followed by a slow decline to pre-incident values. Imagery barcodes cleared up after MIRP rephased at 04:30Z |
|
| 03/16/2004 | 02:46:00 | SCAN MOTOR | AVHRR Scan motor current began intermittently surging to 300+ mAmps. Imagery barcodes started to occur. Surges lasted approx 2 minutes then retreated back to 265 mA for 15 minutes then surged again, continually. |
|
| 01/24/2004 | | SCAN MOTOR | AVHRR HRPT images no longer showing barcode patterns. Scan motor current slowly improving (trending lower). |
|
| 01/16/2004 | 12:20:00 | SCAN MOTOR | TCE24 (AVHRR heater and louver) commanded back on. AVHRR component temps dropped an average of 4 degs C within 2 hours. |
|
| 01/15/2004 | 19:02:00 | ELECTRONICS | AVHRR/MIRP rephase DISABLE. |
|
| 01/15/2004 | 19:01:00 | ELECTRONICS | AVHRR/MIRP rephase enable. |
|
| 01/14/2004 | 13:55:00 | SCAN MOTOR | AVHRR Scan motor current surged to maximum reported value (305 mAmps). Imagery began showing bar code" patterns shortly thereafter." |
|
| 01/06/2004 | | SCAN MOTOR | AVHRR declared YELLOW in status because of degraded imagery, scan motor performance and synch delta statistics. |
|
| 01/06/2004 | | | AVHRR Imagery showing wavey patterns at image edges. |
|
| 01/04/2004 | | SCAN MOTOR | AVHRR Scan Motor and synch delta at significantly elevated levels, imagery exhibiting wave patterns. |
|
| 10/17/2003 | | SCAN MOTOR | AVHRR scan motor current continuously nominal for over 2 weeks. Upgrade status to Green |
|
| 09/29/2003 | 02:15:00 | SCAN MOTOR | AVHRR scan motor current, synch delta values and imagery returned to nominal Maintaining yellow status for the time being. |
|
| 09/26/2003 | 04:30:10 | SCAN MOTOR | AVHRR / MIRP Rephase disable |
|
| 09/26/2003 | 04:30:00 | SCAN MOTOR | AVHRR / MIRP Rephase enable |
|
| 09/23/2003 | 17:05:00 | SCAN MOTOR | AVHRR rephase enable. |
|
| 09/23/2003 | 17:05:00 | SCAN MOTOR | AVHRR rephase disable |
|
| 09/23/2003 | 14:00:00 | SCAN MOTOR | Turned off TCE 24 (AVHRR heater and Louver) to try and warm AVHRR and reduce scan motor lubricant viscosity. |
|
| 09/18/2003 | 18:00:00 | SCAN MOTOR | AVHRR Rephase Disable because of scan motor anomaly. Rephase 2x daily. |
|
| 09/17/2003 | 16:40:00 | SCAN MOTOR | AVHRR scan motor current and synch delta values acting erratically. Status downgraded to YELLOW. |
|
| 08/01/2003 | 22:10:00 | | Activates Macro F, ascending AVHRR channel 3A macro |
|
| 07/28/2003 | 13:00:00 | | Activates Macro F, ascending AVHRR channel 3A macro |
|
| 07/13/2003 | 12:16:00 | CHANNEL 3A | Activation of macro F for polar region AVHRR channel 3A use. 3A active between 65 N (magnetic) and peak of orbit. |
|
| 05/01/2003 | 16:05:00 | OPTICS | Switch to channel 3B only, inhibit automatic 3A-B switching. |
|
| 01/16/2003 | 12:24:00 | ELECTRONICS | Disable MIRP/AVHRR rephaseing |
|
| 01/16/2003 | 12:23:00 | ELECTRONICS | Enable MIRP/AVHRR rephaseing |
|
| 07/03/2002 | 12:01:00 | CHANNEL 3B | Disable AVHRR Channel 3B macro |
|
| 06/15/2002 | 18:00:00 | CHANNEL 3B | Upload and enable macro for switching to AVHRR Channel 3B over Colorado fires |
|
| 07/26/2001 | | | 1 second ground system time measurement software error found - caused along-track error |
|
| 06/01/2001 | | | Investigation determined instrument alignment not cause of along-track error |
|
| 09/22/2000 | | | AVHRR 1 second along-track pointing error observed |
|
| 09/21/2000 | 10:56:00 | PSU | On Orbit |
|
| 09/21/2000 | 10:56:00 | SCAN MOTOR | On Orbit |
|
| 09/21/2000 | 10:56:00 | ELECTRONICS | On Orbit |
|
| 09/21/2000 | 10:56:00 | RADIANT COOLER | On Orbit |
|
| 09/21/2000 | 10:56:00 | OPTICS | On Orbit |
|
| 09/21/2000 | 10:56:00 | BASEPLATE | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 1 | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 2 | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 3A | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 3B | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 4 | On Orbit |
|
| 09/21/2000 | 10:56:00 | CHANNEL 5 | On Orbit |
