Mission Operations Days: 2004/003 to 2004/009
January 03, 2004 00:00:00 GMT to January 09, 2004 00:00:00 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, January 3, 2004
Sunday, January 4, 2004
Monday, January 5, 2004
Tuesday, January 6, 2004
2004/006 20:51:37-21:00:25 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4 OA-16: SD/SDSM screened side A, no door movement.
2004/006 21:30:00 ATC MOD_SRCA_NOMINAL_SETUP.4 Setup of nominal lamp configuration for SRCA calibration
2004/006 21:41:14-22:16:24 ATC MOD_OA19_SRCA_FULL_RAD_A.4 OA19: SRCA Full Radiometric Calibration.
Data collection from 21:57:08-22:16:23.
Wednesday, January 7, 2004
2004/007 02:00:00 ATC MOD_OA26_BB_270K_A.1 Set blackbody temperature to 270K on the A Side
2004/007 20:00:00 ATC MOD_OA26_BB_280K_A.1 Set blackbody temperature to 280K on the A Side
Thursday, January 8, 2004
2004/008 00:00:00 ATC MOD_OA26_BB_285K_A.1 Set blackbody temperature to 285K on the A Side
2004/008 03:00:00 ATC MOD_OA26_BB_290K_A.1 Set blackbody temperature to 290K on the A Side
2004/008 07:00:00 ATC MOD_OA26_BB_315K_A.1 Set blackbody temperature to 315K on the A Side
2004/008 07:00:30 ATC MOD_OA26_BB_DCYCLE_FULL.1 Set blackbody heater duty cycle to FULL
2004/008 10:00:00 ATC MOD_OA26_BB_270K_A.1 Set blackbody temperature to 270K on the A Side
2004/008 10:00:30 ATC MOD_OA26_BB_DCYCLE_THIRD.1 Set blackbody heater duty cycle to THIRD
Friday, January 9, 2004
2004/009 07:00:00 ATC MOD_OA26_BB_290K_A.1 Set blackbody temperature to 290K on the A Side
This Week’s Scheduled MODIS Activities Not Completed:
Upcoming MODIS Events:
Upcoming January calibrations include weekly SDSM SCREENED, monthly SRCA10W Radiometric, bi- monthly SRCA Full Spatial, and quarterly SRCA Full Spectral.
Monday, January 12, 2004
PFM Lunar Calibration (no spacecraft roll)
2004/012 07:11:10 ATC MOD_OA03_FR_DAY_RATE
2004/012 07:57:15 ATC MOD_OA03_FR_NIGHT_RATE (03:23 early)
2004/012 08:18:54-08:25:40 ATC MOD_OA08_ROLL_MAN
2004/012 08:53:26 ATC MOD_OA03_FR_DAY_RATE (03:23 late)
2004/012 09:39:31 ATC MOD_OA03_FR_NIGHT_RATE
Tuesday, January 13, 2004
2004/013 20:57:24-21:06:12 ATC MOD_OA16_SDSM_SCRN_NO_DOOR_A.4 OA-16: SD/SDSM screened side A, no door movement
2004/013 23:15:00 ATC MOD_SRCA_NOMINAL_SETUP.4 Sets up nominal SRCA lamp configuration
2004/013 23:18:07-00:16:18 ATC MOD_OA23_SRCA_FULL_SPAT_A.3 OA-23: SRCA Full Spatial Calibration - A Side
Data collection from 23:34:01-00:15:03
The next Lunar Calibration will occur on DOY 2004/012 (January 12, 2004), with a data collect time from 08:19:02 to 08:25:32. The necessary roll angle is - 0.2827 degrees. This is a small enough angle that the moon may be viewed through the Space View Port (SVP) without needing the spacecraft to perform a roll. Therefore, no roll will be performed for this calibration. However, the MODIS data will be adjusted for Day Rate and Sector Rotation as is standard for a Lunar Calibration.
MODIS NAD Anomaly:
On Wednesday, December 24, 2003 at 20:20:01 (DOY 2003/358), the MODIS Nadir Aperture Door (NAD) was commanded to OPEN. A situation that was expected from previous NAD movements, the "NAD Open" trigger (MOD_CR_DR_NAD_OPEN) did not register from the door movement (it did not change from "NOT_OPEN" to "OPEN" as one would expect). This was anticipated as a possibility. The "NAD Closed" trigger did perform as expected; several seconds after the CP noted it was moving the NAD, the trigger value changed from "CLOSED" to "NOT_CLOSED". This shows the door did move at least enough to allow that trigger to release. The PS1 input current profile looked nominal while the door driver was powered. The CP generated the expected xx69 "NAD Trigger Not Found" from the command door movement with lack of trigger response. However, the door does appear to be OPEN as seen from the data from the Rapid Response team. Science data also appears to be nominal.
The NAD OPEN trigger may yet “pop” to OPEN due to thermal cycling on the trigger, as was seen on 2002/079.
Terra SSR Anomaly:
Although not directly the result of a MODIS problem, the most recent Printed Wire Assembly (PWA) failures in the Terra Solid State Recorder (SSR) do affect MODIS data. See the Non-MODIS Significant Events section below for more details.
Terra SFE Anomaly:
Although not directly the result of a MODIS problem, the SFE anomaly is causing an unrecoverable loss of all current MODIS Direct Broadcast data. Normal science data recording and playbacks are functioning properly. See the Non-MODIS Significant Events section below for more details.
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:
Terra Solid State Recorder Anomaly
The SSR Anomaly is still under investigation. MODIS currently is operating with 34 Supersets allotted for its buffer. There are plans in the works for possibly power cycling the SSR to get back PWA’s that are in the Bad List, but no date has yet been set. There are no current plans for a change in science data capture rates. For details, see previous reports.
Terra SFE Anomaly
The SFE-A on Terra is corrupting every fourth byte of data it produces for the DAS-1 feed to the Direct Broadcast equipment. Terra direct broadcast is currently not operational. For details, see previous reports.
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.
Limited Life Item Status:
SRCA 10W Lamp #1: 222.9 of 500 hours
SRCA 10W Lamp #2: 163.6 of 500 hours
SRCA 10W Lamp #3: 172.8 of 500 hours
SRCA 10W Lamp #4: 62.2 of 500 hours
SRCA 1W Lamp #1: 564.9 of 4000 hours
SRCA 1W Lamp #2: 276.7 of 4000 hours
Solar Diffuser Door: 2146 of 3022 Movements
Nadir Aperture Door: 538 of 1316 Movements
Space View Door: 441 of 1316 Movements