Mission Operations Days: 2002/201 to 2002/207
July 20, 2002 00:00:00 GMT to July 26, 2002 00:00:00 GMT
Note: This report officially only covers up through 20:00 GMT on July 26th, but shortly thereafter, at 21:19 there was an anomaly of C&DH TAXI overflow errors. It appears that the errors were only being received while the MODIS blackbody duty cycle was at FULL (100%) and the blackbody temperature had stabilized at one of the temperature plateaus. At the nominal operating conditions (290K, duty cycle = THIRD) no overflow errors are being reported.
Terra Spacecraft and MODIS Instrument Status:
| Terra (AM-1) is in Normal Mode MODIS is in A-side Science Mode |
||
|---|---|---|
| Component | State(s) | Comment |
| Blackbody | A On (290 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 (83 K) | Nominal |
| RC SMIR FPA Heater | Off | Nominal |
| Scan Assembly | A On; B Off | Nominal |
| SDSM | Off | Nominal |
| SRCA | Off | Nominal |
| PS1 Survival Heater | Enabled | Nominal |
| PS2 Survival Heater | Enabled | Nominal |
| Timing Generator | A On; B Off | Nominal |
| Flight Software | Rev BD + 7 sets of patches
|
Nominal |
| Inhibit Ids Set | None | Nominal |
| TMON 66 | Disabled | Nominal |
| TMON 67 | Disabled | Nominal |
| TMON 68 | Enabled | Nominal |
| TMON 69 | Disabled | Nominal |
This Week's Completed MODIS Activities:
Saturday, July 20, 2002
None
Sunday, July 21, 2002
None
Monday, July 22, 2002
2002/203 11:57 Real-Time MOD_MEM_HALT Executed to clear the FR event 1B message.
Tuesday, July 23, 2002
None
Wednesday, July 24, 2002
2002/205 20:57:41 - 21:55:12 ATC MOD_OA23_SRCA_FULL_SPAT_A.2 SRCA A-side Full Spatial Calibration
Thursday, July 25, 2002
2002/206 06:48:50 - 07:40:29 ATC MOD_OA22_SRCA_FULL_SPECT_1A.3 A-side SRCA Full Spectral Part 1
2002/206 08:44:33 - 09:19:18 ATC MOD_OA22_SRCA_FULL_SPECT_2A.3 A-side SRCA Full Spectral Part 2
2002/206 10:06:39 - 10:58:18 ATC MOD_OA22_SRCA_FULL_SPECT_3A.3 A-side SRCA Full Spectral Part 3
2002/206 12:00:40 - 12:38:38 ATC MOD_OA22_SRCA_FULL_SPECT_4A.2 A-side SRCA Full Spectral Part 4
2002/206 16:00:00 ATC MOD_OA26_BB_270K_A.1 Set blackbody temperature to 270K on the A-side
Friday, July 26, 2002
2002/207 10:00:00 ATC MOD_OA26_BB_280K_A.1 Set blackbody temperature to 280K on the A-side
2002/207 14:00:00 ATC MOD_OA26_BB_285K_A.1 Set blackbody temperature to 285K on the A-side
2002/207 17:00:00 ATC MOD_OA26_BB_290K_A.1 Set blackbody temperature to 290K on the A-side
This Week's Scheduled MODIS Activities Not Completed:
None
Upcoming MODIS Events:
Continuation of Blackbody stepped calibration:
2002/207 21:00:00 ATC MOD_OA26_BB_295K_A.1 Set blackbody temperature to 295K on the A-side
2002/207 21:00:30 ATC MOD_OA26_BB_DCYCLE_FULL.1 Set blackbody duty cycle to FULL (100%)
2002/207 23:00:00 ATC MOD_OA26_BB_300K_A.1 Set blackbody temperature to 300K on the A-side
2002/208 01:00:00 ATC MOD_OA26_BB_315K_A.1 Set blackbody temperature to 315K on the A-side
2002/208 04:00:00 ATC MOD_OA26_BB_270K_A.1 Set blackbody temperature to 270K on the A-side
2002/208 04:00:30 ATC MOD_OA26_BB_DCYCLE_THIRD.1 Set blackbody duty cycle to THIRD (33%)
2002/209 00:00:00 ATC MOD_OA26_BB_290K_A.1 Set blackbody temperature to 290K on the A-side
Lunar Calibration via Roll Maneuver
2002/210 04:52:55 ATC MOD_OA04_NIGHT_RATE.1 (moved ahead 00:03:23 to even out day/night rate from roll)
2002/210 05:11:25 - 05:18:11 ATC MOD_OA08_ROLL_MAN.3
Lunar calibration command details:
2002/210 05:11:25 ATC MOD_SET_FR_RATE, TO = DAY
2002/210 05:11:27 ATC MOD_SET_FR_SCIABNORM, TO = ABNORM
2002/210 05:11:29 ATC MOD_SET_FR_PC_DCRCMP, TO = OFF
2002/210 05:11:31 ATC MOD_SET_FR_PV_DCRCMP, TO = OFF
2002/210 05:11:33 ATC MOD_SET_FR_ENC_DELTA, TO = -3072
2002/210 05:18:03 ATC MOD_SET_FR_ENC_DELTA, TO = 0
2002/210 05:18:05 ATC MOD_SET_FR_PV_DCRCMP, TO = ON
2002/210 05:18:07 ATC MOD_SET_FR_PC_DCRCMP, TO = ON
2002/210 05:18:09 ATC MOD_SET_FR_SCIABNORM, TO = NORM
2002/210 05:18:11 ATC MOD_SET_FR_RATE, TO = NIGHT
2002/210 05:49:10 ATC MOD_OA03_DAY_RATE.1 (moved later by 00:03:23 to even out day/night rate from roll)
Maneuvers:
The next Terra MODIS Lunar Calibration Roll is scheduled for 2002/210 (July 29, 2002), with dta collection from 05:11:33 to 05:18:03 GMT and a roll angle of -7.7199 degrees.
The sixth Terra inclination adjust maneuver has been pushed back to an unspecified date in September to facilitate Lockheed Martin development at Valley Forge for products to support long term planning of possible future inclination maneuvers.
The Terra Deep Space Calibration Maneuver is still postponed. The maneuver date is not expected until late summer of 2002.
MODIS Anomalies:
Formatter Error Events:
The current patches loaded into the MODIS Formatter, record the number of formatter error events, but not the address where they occurred. The error rate was last noted at nearly 37 million errors per day.
Intermittent bad frame count formatter event messages (xx1B) are being observed. This is one of the event messages being used to warn of potential impacts to the science data. The MODIS halt memory transfer command is being sent after each 1B-event message. This command triggers both a CP and FR event message and thus "clears" the current MOD_SS_FR_LAST_EVENT message of the xx1B value.
The most recent error tracking spreadsheets can be retrieved from:
ftp://ftp.mcst.ssai.biz/pub/permanent/IOT/am1/analysis/FR_events/
An MS Excel spreadsheet called, AM1_FR_error_rollovers_current.xls contains the data for the times each error count "roll over" occurs.
General Instrument Comments:
MODIS is in A-side Science Mode with the blackbody maintained at 290K.
MODIS Telemetry Trends:
All systems appear to be functioning properly. Tracking of the Formatter Error Rate is continuing.
Non-MODIS Significant Events:
Science Data Loss Reports can be viewed at:
http://jupiter02.gsfc.nasa.gov:591/ssrloss/
Select "Search Data Losses" and choose Data Type: MOD
Then press the big SUBMIT button.
Limited Life Item Status:
SRCA 10W Lamp #1: 200.8 of 500 hours
SRCA 10W Lamp #2: 152.6 of 500 hours
SRCA 10W Lamp #3: 161.8 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours
SRCA 1W Lamp #1: 559.8 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours
Solar Diffuser Door: 1883 of 3022 Movements
Nadir Aperture Door: 536 of 1316 Movements
Space View Door: 439 of 1316 Movements