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MODIS IOT Terra Weekly Report
Mission Operations Days: 2000/211 to 2000/217
July 29, 2000 20:00:00 GMT to August 4, 2000 20:00:00 GMT
Terra Spacecraft and MODIS Instrument Status:
|
Terra (AM-1) is in Normal Ops Mode MODIS is in Science Mode - A Side MODIS has an anomaly with the LWIR focal plane. See description below. |
||
| Component | State(s) | Comment |
|---|---|---|
| Blackbody | A On (315 K); B Off | Nominal |
| Calibration Electronics | A On; B Off | Nominal |
| Control Processor | A On; B Off | Nominal |
| Nadir Door | Unlatched, Open | Nominal |
| Space View Door | Unlatched, Open | Nominal |
| Solar Diffuser Door | Unlatched, Closed | Nominal |
| FDDI Formatter | A On; B Off | Nominal |
| FDDI Port | A On; B Off | Nominal |
| FIFO Memory | #1 & #2 On; #3 & #4 Off | Nominal |
| Format Processor | A On; B Off | Nominal |
| Power Supplies | #1 On, #2 Off | Nominal |
| PV VIS FPA | A On; B Off | Nominal |
| PV NIR FPA | A On; B Off | Nominal |
| PV SMIR FPA | A On; B Off | Nominal |
| PV LWIR FPA | A On; B Off | Nominal |
| PC LWIR FPA | A On; B Off | Nominal |
| RC Outgas Heaters | All Off (CS, IS, OS) | Nominal |
| RC LWIR FPA Heater | On (85 K) | CFPA Anomaly Investigation |
| RC SMIR FPA Heater | Off | Nominal |
| Scan Assembly | A On; B Off | Nominal |
| SDSM | A Off; B Off | Nominal |
| SRCA | A Off; B Off | Nominal |
| PS1 Survival Heater | Enabled | Nominal |
| PS2 Survival Heater | Enabled | Nominal |
| Timing Generator | A On; B Off | Nominal |
| Flight Software | Rev BD + 3 sets of patches
| Nominal |
| Inhibit Ids Set | None | Nominal |
| TMONs Enabled | 66, 67 | Nominal |
This Week’s Completed MODIS Activities:
Saturday, July 29, 2000None
Sunday, July 30, 2000None
Monday, July 31, 2000
2000/213 00:16:47 ATC – PV Ecal
2000/213 00:20:47 ATC – PC Ecal
2000/213 12:26:06 – 12:59:39 ATC - OA19 SRCA Full Radiometric
2000/213 12:00:00 ATC - Blackbody to 270K
2000/213 13:28:05 – 13:37:09 Data Loss
2000/214 06:00:00 ATC Blackbody to 280K
2000/214 10:00:00 ATC Blackbody to 285K
2000/214 12:00:00 ATC Blackbody to 290K
2000/214 14:00:00 ATC Blackbody to 295K
2000/214 14:00:30 ATC Set Blackbody duty cycle to 100%
2000/214 16:00:00 ATC Blackbody to 300K
2000/214 18:00:00 ATC Blackbody to 315K
2000/214 20:05:00 ATC Blackbody to 270K
2000/214 20:05:30 ATC Set Blackbody duty cycle to 33%
2000/215 12:13:43 – 13:11:14 ATC – OA23 SRCA Full Spatial
2000/215 19:00:00 ATC Blackbody to 290K
2000/215 19:30 Drag Make-up Maneuver
2000/216 05:29:43 ATC OA15 - SD/SDSM Open
2000/216 07:08:36 ATC OA16 - SD/SDSM Screened
2000/216 07:57:25 – 08:49:04 ATC – OA22 SRCA Full Spectral, 30W part I
2000/216 09:52:13 – 10:26:58 ATC – OA22 SRCA Full Spectral, 30W part II
2000/216 11:14:41 – 12:05:57 ATC – OA22 SRCA Full Spectral, 10W part I
2000/216 13:10:00 –14:01:16 ATC – OA22 SRCA Full Spectral, 10W part II
2000/216 20:02:00 ATC Blackbody to 270K
2000/216 20:04:12 Real-time – Turn on LW FPA Heater
2000/216 20:04:59 Real-time – Set focal plane temp to 85
2000/216 20:48 - 21:01 Real-time – Set new gains for bands 24, 25, 27
2000/216 21:35 Real-time – Dump Gain table failed due to timing issues
2000/216 22:24:55 Real-time – Dump Gain Table successful
2000/217 17:00:00 ATC Blackbody to 315K
2000/217 17:00:30 ATC Blackbody duty cycle to 100%
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Saturday, August 5, 2000
2000/218 00:00:00 ATC Blackbody to 270K
2000/218 00:00:30 ATC Blackbody duty cycle to 33%
2000/218 22:00:00 ATC Blackbody to 315K
2000/218 22:00:30 ATC Blackbody duty cycle to 100%
2000/219 05:00:00 ATC Blackbody to 270K
2000/219 05:00:30 ATC Blackbody duty cycle to 33%
2000/220 03:00:00 ATC Blackbody to 290K
2000/220 14:00:?? Real-time – Set Itwk/Vdet to 79/190
2000/220 14:00:?? Real-time – Transition to Standby
2000/220 14:00:?? Real-time – Transition to Low Power
2000/220 14:00:?? Real-time – Turn on Cold Stage
2000/220 14:30:?? Real-time – Turn on Intermediate Stage
2000/220 16:30:00:?? Real-time – Turn on Outer Stage
2000/220 19:00 Attain 318K
2000/221 19:00:?? Real-time – Transition to Standby (timing depends on heater
temperature warm-up rate)
2000/221 23:00:?? Real-time – Transition to Science
2000/221 23:00:?? Real-time – Turn on Blackbody
2000/221 23:00:?? Real-time – Set Blackbody to 285K
None
Thursday, August 10, 2000None
2000/223 23:00 Should be controlling at 83K today
None
Maneuvers:
Wednesday, August 2, 2000 - Drag makeup maneuver (215/19:30:00)
MODIS Anomalies:
The Radiative Cooler has negative margin, therefore the cold focal planes are no longer under thermal control. This affects bands 5, 6, 7, and 20-36. Analysis is underway.
It appears that the gains for band 14H were reset to the original launch values some time between 2000/173/23:45 – 2000/174/03:55. Investigation is underway to determine the reason.
General Instrument Comments:
MODIS is in Science Mode on the A-side with the SVD and NAD open.
Gain Changes
| Band | Detector | Current Gain | New Gain |
|---|---|---|---|
| 24 | 1 | 108 | 102 |
| 24 | 2 | 100 | 94 |
| 24 | 3 | 97 | 92 |
| 24 | 4 | 98 | 93 |
| 24 | 5 | 102 | 96 |
| 24 | 6 | 101 | 95 |
| 24 | 7 | 94 | 89 |
| 24 | 8 | 93 | 88 |
| 24 | 9 | 99 | 94 |
| 24 | 10 | 94 | 89 |
| 25 | 1 | 148 | 136 |
| 25 | 2 | 127 | 127 |
| 25 | 3 | 120 | 114 |
| 25 | 4 | 115 | 109 |
| 25 | 5 | 119 | 113 |
| 25 | 6 | 115 | 109 |
| 25 | 7 | 119 | 113 |
| 25 | 8 | 109 | 103 |
| 25 | 9 | 109 | 103 |
| 25 | 10 | 115 | 109 |
| 27 | 1 | 238 | 228 |
| 27 | 2 | 219 | 209 |
| 27 | 3 | 231 | 221 |
| 27 | 4 | 238 | 238 |
| 27 | 5 | 238 | 238 |
| 27 | 6 | 238 | 238 |
| 27 | 7 | 238 | 238 |
| 27 | 8 | 238 | 238 |
| 27 | 9 | 238 | 238 |
| 27 | 10 | 238 | 238 |
MODIS Telemetry Trends:
See MODIS Anomalies section.
Non-MODIS Significant Events:
Wednesday, July 19 (Day 201) the EOS Operations Center switched to the upgraded on-line operations software build, Rev C. They will also upgraded to Project Database (PDB) 28. The switchover went well and the MODIS IOT is comfortable with the upgrades.
Data processing by EDOS is currently running at a "degraded level". For a detailed summary of the events that have affected their products, view the EOS System Status web page (http://jupiter02.gsfc.nasa.gov:591/sysstat/) and select the EDOS summary link at the top of the page. A key item to note is from day 6/27/2000 at 12:11:19 PM: " The second major issue is the amount of data that EDOS is receiving since ASTER has been fully turned on." With the new, higher data output of ASTER, even less "spare" time will be available to EDOS for the processing of backlogged or reprocessing of data.
Limited Life Item Status:
SRCA 10W Lamp #1: 173.3 of 500 hours
SRCA 10W Lamp #2: 135.9 of 500 hours
SRCA 10W Lamp #3: 145.1 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 555.8 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1393 of 3022 Movements
Nadir Aperture Door: 532 of 1316 Movements
Space View Door: 437 of 1316 Movements
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Last Update: Tuesday, 14-Jan-2003 13:31:09 EST
