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am1weekly_2000-113_2000-119

Mission Operations Days: 2000/113 to 2000/119
April 22, 2000 00:00:00 GMT to April 28, 2000 00:00:00 GMT


Terra Spacecraft and MODIS Instrument Status:

Terra (AM-1) is in Normal Ops Mode
MODIS is in Science Mode - A Side
MODIS has no known Anomalies
ComponentState(s)Comment
BlackbodyA On (290 K); B OffNominal
Calibration ElectronicsA On; B OffNominal
Control ProcessorA On; B OffNominal
Nadir DoorUnlatched, ClosedYan and Inclination Maneuvers
Space View DoorUnlatched, OpenNominal
Solar Diffuser DoorUnlatched, ClosedNominal
FDDI FormatterA On; B OffNominal
FDDI PortA On; B OffNominal
FIFO Memory#1 & #2 On; #3 & #4 OffNominal
Format ProcessorA On; B OffNominal
Power Supplies#1 On, #2 OffNominal
PV VIS FPAA On; B OffNominal
PV NIR FPAA On; B OffNominal
PV SMIR FPAA On; B OffNominal
PV LWIR FPAA On; B OffNominal
PC LWIR FPAA On; B OffNominal
RC Outgas HeatersAll Off (CS, IS, OS)Nominal
RC LWIR FPA HeaterOn (83 K)Nominal
RC SMIR FPA HeaterOffNominal
Scan AssemblyA On; B OffNominal
SDSMA Off; B OffNominal
SRCAA Off; B OffNominal
PS1 Survival HeaterEnabledNominal
PS2 Survival HeaterEnabledNominal
Timing GeneratorA On; B OffNominal
Flight SoftwareRev BD + 1 set of patches
  • FR Band 14H Gain Change (10 commands)
Nominal
Inhibit Ids Set34 (SVD & NAD), 58 (Door Power)Inclination Maneuver
TMONs Enabled66, 67Nominal

This Week’s Completed MODIS Activities:


Note that the Nadir Aperture Door (Earth View) was CLOSED Tuesday thru Friday due to maneuvers.


Saturday, April 22, 2000

None

Sunday, April 23, 2000

None

Monday, April 24, 2000

None

Tuesday, April 25, 2000 - MODIS Yaw Maneuvers

**Note: Day/Night transitions today are abnormal due to yaw maneuvers.
2000/116 11:14:29 Real-time Close Nadir Aperture Door
2000/116 12:30:04 ATC OA-15 SD/SDSM Open Double

2000/116 14:05:40 ATC – Set SciAbnormal Flag
2000/116 14:05:42 – 14:31:14 Yaw Maneuver #1 (+15.1296 deg)
2000/116 14:08:17 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 14:31:16 ATC – Clear SciAbnormal Flag

2000/116 15:45:37 ATC – Set SciAbnormal Flag
2000/116 15:45:39 – 16:09:03 Yaw Maneuver #2 (+11.9552 deg)
2000/116 15:47:10 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 16:09:05 ATC – Clear SciAbnormal Flag

2000/116 17:25:34 ATC – Set SciAbnormal Flag
2000/116 17:25:36 – 17:46:52 Yaw Maneuver #3 (+8.7552 deg)
2000/116 17:26:03 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 17:46:54 ATC – Clear SciAbnormal Flag

2000/116 19:05:31 ATC – Set SciAbnormal Flag
2000/116 19:05:33 – 19:23:41 Yaw Maneuver #4 (+5.5552 deg)
2000/116 19:04:56 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 19:23:43 ATC – Clear SciAbnormal Flag

2000/116 20:43:47 ATC – Set SciAbnormal Flag
** Yaw Maneuver #5 Failed to execute, see Non-MODIS Significant Events below
2000/116 20:43:49 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 21:02:31 ATC – Clear SciAbnormal Flag

2000/116 22:22:39 ATC – Set SciAbnormal Flag
2000/116 22:24:53 – 22:40:44 Yaw Maneuver #6 (-0.82208 deg)
2000/116 22:22:41 ATC – MOD_OA09_SD_YAW_OPEN_DBL_A
2000/116 22:40:46 ATC – Clear SciAbnormal Flag

Wednesday, April 26, 2000 - MODIS Yaw Maneuvers

2000/117 00:02:14 ATC OA-15 SD/SDSM Open – Double Collect

**Note: Day/Night transitions today are abnormal due to yaw maneuvers.
2000/117 11:34:24 ATC OA-16 SD/SDSM Screened Double

2000/117 13:09:57 ATC – Set SciAbnormal Flag
2000/117 13:09:59 – 13:35:35 Yaw Maneuver #1 (+15.2576 deg)
2000/117 13:12:36 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 13:35:37 ATC – Clear SciAbnormal Flag

2000/117 14:49:44 ATC – Set SciAbnormal Flag
2000/117 14:49:46 – 15:13:06 Yaw Maneuver #2 (+12.0576 deg)
2000/117 14:51:29 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 15:13:08 ATC – Clear SciAbnormal Flag

2000/117 16:29:51 ATC – Set SciAbnormal Flag
2000/117 16:29:53 – 16:51:13 Yaw Maneuver #3 (+8.8576 deg)
2000/117 16:30:22 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 16:51:15 ATC – Clear SciAbnormal Flag

2000/117 18:09:03 ATC – Set SciAbnormal Flag
2000/117 18:09:50 – 18:29:02 Yaw Maneuver #4 (+5.68323 deg)
2000/117 18:09:05 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 18:29:04 ATC – Clear SciAbnormal Flag

2000/117 19:48:06 ATC – Set SciAbnormal Flag
2000/117 19:49:45 – 20:06:50 Yaw Maneuver #5 (+2.4665 deg)
2000/117 19:48:08 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 20:06:52 ATC – Clear SciAbnormal Flag

2000/117 21:26:58 ATC – Set SciAbnormal Flag
2000/117 21:29:14 – 21:44:57 Yaw Maneuver #6 (-0.70884 deg)
2000/117 21:27:00 ATC – MOD_OA09_SD_YAW_SCREEN_DBL_A
2000/117 21:45:18 ATC – Clear SciAbnormal Flag

2000/117 23:06:33 ATC OA-16 SD/SDSM Screened Double

Thursday, April 27, 2000 - Inclination Maneuver

2000/118 01:40:14 ATC – SRCA Full Spatial
2000/118 09:22:28 Real-time PC and PV DC Restore OFF
2000/118 09:54:34 ATC – Set SciAbnormal Flag
2000/118 09:54:36 ATC – Sector Rotation to –3400
2000/118 09:54:38 ATC – SRCA Full Spatial
2000/118 10:52:11 ATC – Sector Rotation to Zero
2000/118 11:01:30 Real-time PC and PV DC Restore OFF
2000/118 10:52:13 ATC - Clear SciAbnormal Flag

2000/118 13:29:30 Real-time NAD Table Dump

2000/118 14:17 - 14:27 Real-time Ecal Sweeps; Vcal starts 48,43,53,60 8 Vcal steps of 1 DN, Nstep of 20,20,20,8
2000/118 15:53 - 16:04 Real-time Ecal Sweeps; Vcal starts 48,43,53,60 8 Vcal steps of 1 DN, Nstep of 22,22,22,10
2000/118 16:31 - 16:42 Real-time Ecal Sweeps; Vcal starts 48,43,53,60 8 Vcal steps of 1 DN, Nstep of 18,18,18,6

2000/118 16:42 Real-time Set Inhibit ID #34 (SVD & NAD)
2000/118 19:28 Real-time Set Inhibit ID #58 (Door Power)

2000/118 20:13:06 – 20:38:06 *Real-time Inclination Maneuver #1

Friday, April 28, 2000 - Inclination Maneuver; Post-inclination Drag Makeup Maneuver

2000/119 19:17:27 – 19:42:27 *Real-time Inclination Maneuver #2

* Due to constraints in the scheduling software, the ATC - Set/Clear SciAbnormal Flag activity is no longer "blocking" the Inclination Maneuvers' time frames. This concession was required to allow for the scheduling of the contingency activities to close the Space View Door.

This Week's Scheduled MODIS Activities Not Completed:

Thursday, April 27, 2000

2000/118 20:37:37 ATC - Close Space View Door
(Inclination Maneuver #1 Contingency)

Friday, April 28, 2000

2000/119 19:41:56 ATC - Close Space View Door
(Inclination Maneuver #2 Contingency)

Upcoming MODIS Events:

Friday, April 28, 2000

2000/119 20-24 ?? Real-time Open Nadir Aperture Door
2000/119 20-24 ?? Real-time NAD Table Dump
2000/119 20-24 ?? Real-time Clear Inhibit ID #34 (SVD & NAD)
2000/118 20-24 ?? Real-time Clear Inhibit ID #58 (Door Power)

Saturday, April 29, 2000

None

Sunday, April 30, 2000

None

Monday, May 1, 2000

2000/122 13:34:34 ATC OA-16 SD/SDSM Screened
2000/122 23:27:50 ATC OA-15 SD/SDSM Open
2000/122 20:02:00 ATC Blackbody to 270K

Tuesday, May 2, 2000

2000/123 14:00:00 ATC Blackbody to 315K
2000/123 14:00 ?? Real-time Set Blackbody duty cycle to 100%
2000/123 21:00:00 ATC Blackbody to 270K
2000/123 21:00 ?? Real-time Set Blackbody duty cycle to 33%

Wednesday, May 3, 2000

2000/124 13:22:01 ATC OA-16 SD/SDSM Screened
2000/124 19:00:00 ATC Blackbody to 290K

Thursday, May 4, 2000

None

Friday, May 5, 2000

2000/126 13:09:27 ATC OA-16 SD/SDSM Screened

Maneuvers:

Wednesday, May 3, 2000 - Possible need for drag make-up maneuver

MODIS Anomalies:

None.

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD open and NAD closed.

MODIS Telemetry Trends:

Telemetry is nominal.

Non-MODIS Significant Events:

The following event failed to execute:

2000/116 20:45:29 – 21:02:29 Yaw Maneuver #5 (+2.3658 deg)

Cause (From the Terra Engineering Report for DOY 116 April 25, 2000):

Power surge at 20:06. OPS, EDOS, MMS, analysis all down. All OPS machines powered off. ISTs needed to be reset to get good telemetry once systems came back up. Systems up and commanding was re-established at 21:03. One slew was missed due to power failure.

Additionally, due to a later power hit, an EDOS tape drive suffered a failure. As a result, all Low Rate Science Data was lost from 2000-116-21:35:15 to 2000-116-22:51:09. The Low Rate Science Data contains information (APIDs, etc...) required to create the full Science Data products. The lost data is not expected to be recovered.

Limited Life Item Status:

SRCA 10W Lamp #1: 154.6 of 500 hours
SRCA 10W Lamp #2: 129.4 of 500 hours
SRCA 10W Lamp #3: 138.6 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 546.1 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1325 of 3022 Movements
Nadir Aperture Door: 531 of 1316 Movements
Space View Door: 437 of 1316 Movements