Mission Operations Days: 2011/218 through 2011/224
August 06, 2011 20:00:00 GMT to August 12, 2011 20:00:00 GMT
Terra Spacecraft and MODIS Instrument Status:
|AM-1 "Terra" is in Normal Mode|
PFM MODIS is in A-Side Nominal Science Mode
(Cross Strapped with FR B)
|Blackbody||A On (290K); B Off||Nominal Science Mode|
|Calibration Electronics||A On; B Off||Nominal Science Mode|
|Control Processor||A On; B Off||Nominal Science Mode|
|Nadir Door||Unlatched, Open||Nominal Science Mode|
|Space View Door||Unlatched, Open||Nominal Science Mode|
|Solar Diffuser Door||Unlatched, Screened||Permanent Configuration|
|FDDI Formatter||A On; B Off||Nominal Science Mode|
|FDDI Port||A On; B Off||Nominal Science Mode|
|FIFO Memory||#1 & #2 On; #3 & #4 Off||Nominal Science Mode|
|Format Processor||A Off; B On||Nominal Science Mode|
|Power Supplies||#1 On, #2 Off||Nominal Science Mode|
|PV VIS FPA||A On; B Off||Nominal Science Mode|
|PV NIR FPA||A On; B Off||Nominal Science Mode|
|PV SMIR FPA||A On; B Off||Nominal Science Mode|
|PV LWIR FPA||A On; B Off||Nominal Science Mode|
|PC LWIR FPA||A On; B Off||Nominal Science Mode|
|RC Outgas Heaters||All 3 (CS, IS, OS) Off||Nominal Science Mode|
|RC LWIR FPA Heater||On (83K)||Nominal Science Mode|
|RC SMIR FPA Heater||Off||Nominal Science Mode|
|Scan Assembly||A On; B Off||Nominal Science Mode|
|SDSM||Off||Nominal Science Mode|
|SRCA||Off||Nominal Science Mode|
|PS1 Survival Heater||Enabled||Nominal Science Mode|
|PS2 Survival Heater||Enabled||Nominal Science Mode|
|Timing Generator||A On; B Off||Nominal Science Mode|
|Flight Software||Rev BD + 11 sets of patches||Nominal Science Mode|
|Inhibit Ids Set||none||Nominal Science Mode|
|TMON 66||Disabled||Nominal Science Mode|
|TMON 67||Disabled||Nominal Science Mode|
|TMON 68||Enabled||Nominal Science Mode|
|TMON 69||Disabled||Nominal Science Mode|
This Week's Completed MODIS Activities:
Saturday, August 06, 2011
2011/211 02:00:00 ATC MOD_OA26_BB_290K_A.2
Set blackbody temperature to 290K on the A Side
Sunday, August 07, 2011
Monday, August 08, 2011
Tuesday, August 09, 2011
Wednesday, August 10, 2011
2011/222 11:48:08-11:48:37 ATC MOD_SRCA_9_8_2_SETUP_CC.1
SRCA setup activity using lamps 1, 4, and 5, and in constant current
2011/222 11:51:08-12:42:49 ATC MOD_OA22_SRCA_FULL_SPECT_1.1
OA-22: SRCA Full Spectral Calibration Part 1
20W-lamp data collection is from 12:07:02-12:42:48.
Thursday, August 11, 2011
Friday, August 12, 2011
This Week's Scheduled MODIS Activities Not Completed:
2011/222 17:00:20-17:43:11 ATC MOD_OA22_SRCA_FULL_SPECT_2.1
OA-22: SRCA Full Spectral Calibration Part 2
20W-lamp data collection is from 17:00:20-17:34:51.
2011/222 18:23:36-18:24:05 ATC MOD_SRCA_9_8_2_SETUP_CC.1
SRCA setup activity using lamps 1, 4, and 5, and in constant current
2011/222 18:26:36-19:17:54 ATC MOD_OA22_SRCA_FULL_SPECT_3.1
OA-22: SRCA Full Spectral Calibration Part 3
10W-lamp data collection is from 18:43:03-19:17:36.
2011/222 20:16:54-21:02:11 ATC MOD_OA22_SRCA_FULL_SPECT_4.1
OA-22: SRCA Full Spectral Calibration Part 4
10W-lamp data collection is from 20:16:54-20:54:54.
This Month's Upcoming MODIS Events:
Calibrations for the end of July and August will include a Black Body Cycle (DOY 208-211), an SRCA Spectral (DOY 222), a PV ECAL (DOY 226), an SRCA Radiometric (DOY 227), an SDSM Screened (DOY 228), and a Lunar Roll (DOY 230).
Sunday, August 14, 2011
2011/226 20:45:07-20:47:38 ATC MOD_OA27_PV_ECAL.3
OA-27: Photovoltaic bands electronics calibration.
Centered on S/C maximum latitude at 20:46:22.
Monday, August 15, 2011
2011/227 20:33:43-20:34:12 ATC MOD_SRCA_9_8_2_SETUP_CC.1
SRCA setup activity using 10W lamps 1 and 4, and 1W lamp 5, in constant
current feedback mode.
2011/227 20:36:43-21:08:08 ATC MOD_OA19_SRCA_FULL_RAD.1
OA-19: SRCA Full Radiometric Calibration.
Data collection 20:52:44-21:08:07 (centered on S/C Night)
S/C Night 20:42:59-21:16:53.
Tuesday, August 16, 2011
2011/228 20:21:05-20:29:53 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4
OA-16: SD/SDSM screened side A, no door movement.
Thursday, August 18, 2011
Lunar Roll Maneuver (-7.9336 degrees)
2011/230 16:06:19 ATC MOD_OA03_FR_NIGHT_RATE.1 (03:23 early)
2011/230 16:39:41-16:46:27 ATC MOD_OA08_ROLL_MAN.3
2011/230 17:02:24 ATC MOD_OA03_FR_DAY_RATE.2 (03:23 late)
The MODIS IOT had to waive parts 2 - 4 of the scheduled SRCA Spectral activities on DOY 222. On two separate occasions during the scheduled contacts from 222/13:04-13:44 and 222/15:00-15:20, we attempted to load and dump the part 2 commands into macro 31 on board MODIS. Both times it seemed as if the files were loaded and dumped correctly, however during verification we noticed that on both occasions only 25 of the 26 files made it to the ground successfully. After double checking the logs and verifying that the scripts that were sent to the spacecraft were correct, we were unable to pin down the cause of the dump failures and were forced to waive the remainder of the activities due to time constraints. The failure to complete the remaining parts of the Spectral activities entailed us keeping inhibit IDs 33 and 54 set to prevent the activities from executing.
General Instrument Comments:
MODIS is in Science Mode, using all A-side components, but cross-strapped to Formatter B, with the blackbody maintained at 290K and the Solar Diffuser Door at the Screened position.
MODIS Telemetry Trends:
Nominal telemetry trending is ongoing.
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 web pages. There are directions at the URL below for how to obtain a username/password.
Following the Inclination Maneuver on DOY 286 (10/13/09), Terra experienced a Hex Bay Battery (BBAT) cell #50 failure and simultaneously (or close to same time) experienced a Battery Heater Control Electronic anomaly which prevents controlling the temperature for 5 of the 9 heater groups within BBAT. Cell #50 has failed and is non-recoverable. Battery temperatures have stabilized and battery cell temperatures are within an acceptable range. Terra has a robust power system with two 54 cell batteries that feed a power control system that maintains a stable 120V spacecraft power bus even if multiple cells fail. Terra is capable of continuing nominal operations with multiple cell failures. Science data acquisition has remained nominal throughout the anomaly and troubleshooting timeframe. Information will be updated periodically. At this point in time the Terra Battery Anomaly is not affecting science data collection and all MODIS systems are nominal. There has been little if any impact to operations since the issue began. All operations are nominal.
Limited Life Item Status:
SRCA 10W Lamp #1: 298.8 of 500 hours
SRCA 10W Lamp #2: 172.1 of 500 hours
SRCA 10W Lamp #3: 190.3 of 500 hours
SRCA 10W Lamp #4: 100.2 of 500 hours
SRCA 1W Lamp #1: 581.7 of 4000 hours
SRCA 1W Lamp #2: 282.0 of 4000 hours
Solar Diffuser Door: 2146 of 3022 Movements
Nadir Aperture Door: 540 of 1316 Movements
Space View Door: 443 of 1316 Movements