Mission Operations Days: 2003/018 to 2003/024
January 18, 2003 00:00:00 GMT to January 24, 2003 00:00:00 GMT
Ground Commanding to MODIS has failed.
See Anomalies below for more details.
Aqua Spacecraft and MODIS Instrument Status:
| PM-1 "Aqua" is in Fine Pointing Normal Mode FM1 MODIS is in B-Side Nominal Science Mode |
||
|---|---|---|
| Component | State(s) | Comment |
| Blackbody | A Off; B On | Nominal Science Mode |
| Calibration Electronics | A Off; B On | Nominal Science Mode |
| Control Processor | A Off; B On | Nominal Science Mode |
| Nadir Door | Unlatched, Open | Nominal Science Mode |
| Space View Door | Unlatched, Open | Nominal Science Mode |
| Solar Diffuser Door | Unlatched, Closed | Nominal Science Mode |
| FDDI Formatter | A Off; B On | Nominal Science Mode |
| FDDI Port | A Off; B On | Nominal Science Mode |
| FIFO Memory | #1 & #2 Off; #3 & #4 On | Nominal Science Mode |
| Format Processor | A Off; B On | Nominal Science Mode |
| Power Supplies | #1 Off, #2 On | Nominal Science Mode |
| PV VIS FPA | A Off; B On | Nominal Science Mode |
| PV NIR FPA | A Off; B On | Nominal Science Mode |
| PV SMIR FPA | A Off; B On | Nominal Science Mode |
| PV LWIR FPA | A Off; B On | Nominal Science Mode |
| PC LWIR FPA | A Off; B On | Nominal Science Mode |
| RC Outgas Heaters | All 3 (CS, IS, OS) Off | Nominal Science Mode |
| RC LWIR FPA Heater | Off | Nominal Science Mode |
| RC SMIR FPA Heater | On | Nominal Science Mode |
| Scan Assembly | A Off; B On | Nominal Science Mode |
| SDSM | Off | Nominal Science Mode |
| SRCA | Off | Nominal Science Mode |
| PS1 Survival Heaters | Enabled | Nominal Science Mode |
| PS2 Survival Heaters | Enabled | Nominal Science Mode |
| Timing Generator | A Off; B On | Nominal Science Mode |
| Flight Software | Rev BJ | Nominal Science Mode |
| Inhibit Ids Set | None | Nominal Science Mode |
This Week’s Completed MODIS Activities:
Saturday, January 18, 2003
None
Sunday, January 19, 2003
None
Monday, January 20, 2003
2003/020 10:13:00-10:13:16 MCL MOD_SRCA_SETUP.2 SRCA Setup Activity
2003/020 10:15:40-11:12:37 MCL MOD_OA23_SRCA_FULL_SPAT.1 OA-23: SRCA Full Spatial - B Side
2003/020 20:55:52-21:09:50 MCL MOD_OA16_SDSM_SCREEN.2 OA-16: SD/SDSM Screened - B Side
2003/020 21:45:00-21:45:16 MCL MOD_SRCA_SETUP.2 SRCA Setup Activity
2003/020 21:47:52-22:22:05 MCL MOD_OA19_SRCA_FULL_RAD.1 OA-19: SRCA Full Radiometric - B Side
2003/020 22:34:45-22:48:43 MCL MOD_OA15_SDSM_OPEN.1 OA-15: SD/SDSM Opened - B Side
Tuesday, January 21, 2003
2003/021 12:55 Real-Time FSW_ISC_SET_INHIBIT(63) Prevents execution of the upcoming SRCA activities should any problems arise.
2003/021 12:58 Real-Time MOD_MEM_PM_DUMP(‘SECTOR_SIZE’,5,0,0,1,1) Baseline memory dump of the Sector Size table (#7)
2003/021 13:00 Real-Time MOD_MEM_PM_DUMP(‘FR_OPERAND’,15,26658,0,1,2) Baseline memory dump of the Flight Software region needing to be patch for the sector change
2003/021 13:01 Real-Time MOD_MEM_PM_DUMP(‘SECTOR_DEFINITION’,40,0,0,1,2) Baseline memory dump of the Sector Definition table (#8)
The memory dumps appeared to fail. Contingency and diagnostic steps then followed.
2003/021 16:07:04 Real-Time MOD_MEM_HALT Instructs MODIS to clear its memory load and dump buffers and reset related processes.
2003/021 22:34:56 Real-Time MOD_MEM_HALT Sent as a “NO-OP” command to test the apparent failure to send ground commands to MODIS.
2003/021 21:03:00-21:03:16 MCL MOD_SRCA_SETUP.2 SRCA Setup Activity (Turns on SRCA Electronics, not lamps)
2003/021 22:28:00-22:28:16 MCL MOD_SRCA_SETUP.2 SRCA Setup Activity (Turns on SRCA Electronics, not lamps)
2003/021 23:56:10 Real-Time FSW_ISC_CLEAR_INHIBIT(63) Clear the ISC Inhibit ID #63
2003/021 23:56:39 Real-Time FSW_ISC_ACTIVATE_SCS(69) Turns off the SRCA.
Wednesday, January 22, 2003
2003/022 20:03:33 Real-Time CDH_INSTXACT_ENAB(‘MODIS’) Re-Enables the MODIS ground commanding transaction
2003/022 20:10:43 Real-Time MOD_MEM_HALT Sent as a “NO-OP” command to test the apparent failure to send ground commands to MODIS.
Thursday, January 23, 2003
None
Friday, January 24, 2003
None
This Week’s Scheduled MODIS Activities Not Completed:
The following events were not executed due to real-time commanding issues. See the anomaly section below.
Tuesday, January 21, 2003
2003/021 21:06:54-21:42:12 MCL MOD_OA30_XTALK_TEST3_1B.1 OA-30: SRCA Cross-Talk Test - Version 3, Part 1, B Side
2003/021 22:31:05-23:18:38 MCL MOD_OA30_XTALK_TEST3_2B.2 OA-30: SRCA Cross-Talk Test - Version 3, Part 2, B Side
Upcoming MODIS Events:
Saturday, January 25, 2003
None
Sunday, January 26, 2003
None
Monday, January 27, 2003
2003/027 21:02:22-21:16:20 MCL MOD_OA16_SCREEN.2 OA-16: SD/SDSM Screened - B Side
2003/027 22:41:15-22:55:13 MCL MOD_OA15_OPEN.1 OA-15: SD/SDSM Open - B Side
Tuesday, January 28, 2003
2003/028 20:55:46-20:56:02 MCL MOD_SRCA_SETUP.2 SRCA B Side Configuration
2003/028 20:56:16-21:47:58 MCL MOD_OA22_SRCA_FULL_SPECT_1.1 OA-22: SRCA Full Spectral, Part 1
2003/028 22:50:33-23:25:05 MCL MOD_OA22_SRCA_FULL_SPECT_2.1 OA-22: SRCA Full Spectral, Part 2
Wednesday, January 29, 2003
2003/029 00:13:01-00:13:17 MCL MOD_SRCA_SETUP.2 SRCA B Side Configuration
2003/029 00:13:31-01:04:32 MCL MOD_OA22_SRCA_FULL_SPECT_3.1 OA-22: SRCA Full Spectral, Part 3
2003/029 02:08:20-02:46:21 MCL MOD_OA22_SRCA_FULL_SPECT_4.1 OA-22: SRCA Full Spectral, Part 4
2003/029 21:52:29-21:52:45 MCL MOD_SRCA_SETUP.2 SRCA B Side Configuration
2003/029 21:52:59-22:08:54 MCL MOD_OA20_SRCA_10W_RAD.1 OA-20: SRCA 10W Radiometric (Continuous) Begins 5 minutes prior to S/C Night, Orbit 3942
2003/029 23:51:52-23:52:23 MCL MOD_SRCA_OFF.1 Turns off SCRA from OA-20 Continuous Activity Begins 15 minutes after S/C Night, Orbit 3943
Thursday, January 30, 2003
2003/030 20:56:53-20:57:09 MCL MOD_SRCA_SETUP.2 SRCA B Side Configuration
2003/030 20:57:23-22:56:47 MCL MOD_OA21_SRCA_1W_RAD.2 OA-21: SRCA 1W Radiometric (Continuous) Begins 5 minutes prior to S/C Night, Orbit 3956 Ends 15 minutes after S/C Night, Orbit 3957 * activity was built to include SRCA Off SCS
Friday, January 31, 2003
None
Saturday, February 1, 2003
None
Sunday, February 2, 2003
None
Monday, February 3, 2003
2003/034 01:00:00 MCL MOD_BB_TEMP_SET_270K_B.1 BB Temp Set to 270K for CP B Coefficients
2003/034 19:00:00 MCL MOD_BB_TEMP_SET_280K_B.1 BB Temp Set to 280K for CP B Coefficients
2003/034 23:00:00 MCL MOD_BB_TEMP_SET_285K_B.1 BB Temp Set to 285K for CP B Coefficients
Tuesday, February 4, 2003
2003/035 02:00:00 MCL MOD_BB_TEMP_SET_290K_B.1 BB Temp Set to 290K for CP B Coefficients
2003/035 06:00:00 MCL MOD_BB_TEMP_SET_295K_B.1 BB Temp Set to 295K for CP B Coefficients
2003/035 06:00:30 MCL MOD_BB_DCYCLE_FULL.1 BB Duty Cycle set to FULL
2003/035 10:00:00 MCL MOD_BB_TEMP_SET_315K_B.1 BB Temp Set to 315K for CP B Coefficients
2003/035 13:00:00 MCL MOD_BB_TEMP_SET_270K_B.1 BB Temp Set to 270K for CP B Coefficients
2003/035 13:00:30 MCL MOD_BB_DCYCLE_THIRD.1 BB Duty Cycle set to THIRD
Wednesday, February 5, 2003
2003/036 09:00:00 MCL MOD_BB_TEMP_SET_285K_B.1 BB Temp Set to 285K for CP B Coefficients
January calibrations: biweekly SDSM, monthly SRCA Radiometric, bimonthly SRCA Spatial, quarterly SRCA Spectral, and quarterly Black Body.
February calibrations: biweekly SDSM, monthly SRCA Radiometric, and bimonthly PV Ecal.
A flight software patch is planned to the Control Processor CP07 mode transition table to not turn off the instrument formatter when MODIS transitions to Safe Mode.
Maneuvers:
The next Aqua MODIS Lunar Calibration via roll maneuver will be on February 12th, 2003 (2003/043). The roll angle will be -11.6949 degrees and the data collection period will be from 13:58:42 to 14:05:12 GMT.
The next Aqua drag make-up maneuver will be on January 30, 2003. The burn will be approximately 60 seconds in duration at 2003/030 21:26:30, with the slew out beginning at 2003/030 19:33:44 GMT. The S/C will return to normal attitude 2003/030 22:25:00 GMT.
The Deep Space Calibration pitch maneuver(s) have been indefinitely suspended pending mission review.
MODIS Anomalies:
Several Memory Loads and Dumps to the MODIS instrument had been planned as part of the Aqua MODIS SRCA crosstalk calibration scheduled for 2003/021. The first three memory dumps of that plan (~13:00 GMT) were to be used to gather the baseline values of the memory locations involved with the SD/SRCA sector swapping loads. All three memory dumps failed.
There is no threat to the health and safety of the MODIS instrument. MODIS is still in science mode and producing data nominally. Those SRCA calibrations planned for 2003/021 will be postponed. Inhibit ID #63 was set to prevent the calibrations from executing. Shortly after 22:31:05 GMT ISC SCS #69 was activated to turn off the MODIS SRCA calibrator.
A CAM had been scheduled for 2:30 EST that afternoon to discuss another patch to the MODIS control processor. That CAM has been postponed. In its place an anomaly review meeting was being held to discuss the dropped command events.
The cause of the dropped commands was determined to be a result of the Aqua BST patch created to resolve the timing problems that caused the previous MODIS stored command drop events. The memory dump procedures were the first real-time commands sent to MODIS since the patch had been loaded to the Aqua BST to swap the CTC-to-MODIS and ISC-to-MODIS command slots. Whereas about 1 in 1000 ISC stored commands were being dropped without any BST patches, all five of the real-time commands that were sent in those procedures did not reach MODIS. The patch created for the Aqua BST was missing a value used for determining correct transaction enable and disable states. Thereby, the stored commands for MODIS disable the ground commanding for MODIS. The test to re-enable the MODIS ground commanding transaction was successful. The subsequent MEM_HALT command arrived at MODIS. Afterward, the stored Formatter Day/Night mode command executed as scheduled, and as predicted, disabled the MODIS ground commanding transaction.
Work is underway to fix the current BST patch as well as modify the final BST patch that was nearing final review approval.
A work around process, in the event of a MODIS red limit anomaly, has already been outlined. This ensures that MODIS will be safely protected in any anomalous situation requiring non-stored-command commanding.
General Instrument Comments:
FM1 MODIS is in Science Mode. The SVD and NAD are Open, the survival heaters are enabled, and the Black Body is heated to 285 K.
MODIS Telemetry Trends:
The FM1 MODIS instrument telemetry is trending nominally. A slight increase in the radiative cooler intermediate stage temperature has been observed along with a decrease in the focal plane heater power usage. The radiative cooler temperatures has not leveled off as dramatically for the FM1 MODIS as they did for the PFM MODIS, but the intermediate stage temperature has only risen about 1 degree Celsius and the focal plane heater still has approximately 40mW of power margin remaining. These telemetry points will continue to be closely monitored.
Non-MODIS Significant Events:
The EMOS mission status webpage (which includes instrument data loss records) can be found at the following URL. Note that a password is now required to access the EOS mission links webpages. There are directions at the URL below for how to obtain a username/password.
http://jupiter02.gsfc.nasa.gov/links/links.htm
Limited Life Item Status:
SRCA 10W Lamp #1: 210.6 of 500 hours
SRCA 10W Lamp #2: 182.5 of 500 hours
SRCA 10W Lamp #3: 185.1 of 500 hours
SRCA 10W Lamp #4: 57.7 of 500 hours
SRCA 1W Lamp #1: 501.4 of 5000 hours
SRCA 1W Lamp #2: 269.8 of 5000 hours
Solar Diffuser Door: 1924 of 3022 Movements
Nadir Aperture Door: 1053 of 1316 Movements
Space View Door: 632 of 1316 Movements