Skip Menu/Navigation Bar
MODIS Support Teams Logo

MAIN PAGE

MODIS INFO

INSTRUMENT OPS

Weekly Reports

MODIS History


CALIBRATION

L1B PRODUCT INFO
& STATUS

CONTACTS & STAFF


ON-LINE DOCS

FREQUENTLY
ASKED QUESTIONS

SITE MAP

SEARCH

RELATED LINKS

MCST DICTIONARY


NASA/GSFC Website Privacy and Security Statement, Disclaimer, and Accessibility Certification


MODIS Web Organigram (Logo) - Click to Navigate Core MODIS-Related Web Sites

MODIS IOT Aqua Weekly Report

Mission Operations Days: 2002/173 to 2002/179
June 22, 2002 00:00:00 GMT to June 29, 2002 00:00:00 GMT

MODIS "First Light": The MODIS Nadir Aperture Door was opened on 2002/175 at 23:22:48 GMT.
MODIS transitioned to SAFE Mode on 2002/178 at 15:40:44 GMT due to a spacecraft CTC swap.

Aqua Spacecraft and MODIS Instrument Status:

PM-1 "Aqua" is in Fine Pointing Standby Mode
FM1 MODIS is in B-Side Safe Mode
Component State(s) Comment
Blackbody A Off; B Off Safe Mode
Calibration Electronics A Off; B Off Safe Mode
Control Processor A Off; B On Safe Mode
Nadir Door Unlatched, Closed Safe Mode
Space View Door Unlatched, Closed Safe Mode
Solar Diffuser Door Unlatched, Closed Safe Mode
FDDI Formatter A Off; B Off Safe Mode
FDDI Port A Off; B Off Safe Mode
FIFO Memory #1 & #2 Off; #3 & #4 Off Safe Mode
Format Processor A Off; B Off Safe Mode
Power Supplies #1 Off, #2 On Safe Mode
PV VIS FPA A Off; B Off Safe Mode
PV NIR FPA A Off; B Off Safe Mode
PV SMIR FPA A Off; B Off Safe Mode
PV SMIR FPA A Off; B Off Safe Mode
PV LWIR FPA A Off; B Off Safe Mode
PC LWIR FPA A Off; B Off Safe Mode
RC Outgas Heaters All 3 (CS, IS, OS) Off Safe Mode
RC LWIR FPA Heater Off Safe Mode
RC SMIR FPA Heater Off Safe Mode
Scan Assembly A Off; B Off Safe Mode
SDSM Off Safe Mode
SRCA Off Safe Mode
PS1 Survival Heaters Enabled Safe Mode
PS2 Survival Heaters Enabled Safe Mode
Timing Generator A Off; B Off Safe Mode
Flight Software Rev BJ Safe Mode
Inhibit Ids Set None Safe Mode

This Week's Completed MODIS Activities:

Saturday, June 22, 2002

None

Sunday, June 23, 2002
(MET day 50, Day #3 of Yaw Maneuvers)

Notes for Yaw Maneuvers: The yaw maneuvers use sector rotation (to -3400 counts). During this time, the formatter is set to DAY rate. In order to balance the MODIS data output, and equal amount of NIGHT rate data will be collected during what would normally be DAY rate.

0 Degree Yaw maneuver
2002/174 12:22:10-12:43:08 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 12:55:03 MOD_OA03_FR_DAY_RATE.1
2002/174 13:26:06 MOD_OA03_FR_NIGHT_RATE.2

-1.3 Degree Yaw maneuver
2002/174 14:01:03-14:22:01 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 14:33:56 MOD_OA03_FR_DAY_RATE.1
2002/174 15:04:58 MOD_OA03_FR_NIGHT_RATE.2

1.3 Degree Yaw maneuver
2002/174 15:39:55-16:00:53 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 16:12:49 MOD_OA03_FR_DAY_RATE.1
2002/174 16:43:51 MOD_OA03_FR_NIGHT_RATE.2

3.9 Degree Yaw maneuver
2002/174 17:18:48-17:39:46 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 17:51:42 MOD_OA03_FR_DAY_RATE.1
2002/174 18:22:44 MOD_OA03_FR_NIGHT_RATE.2

6.5 Degree Yaw maneuver
2002/174 18:57:41-19:18:39 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/174 19:30:35 MOD_OA03_FR_DAY_RATE.1
2002/174 20:01:37 MOD_OA03_FR_NIGHT_RATE.2

9.1 Degree Yaw maneuver
2002/174 20:36:34-20:57:32 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 21:09:28 MOD_OA03_FR_DAY_RATE.1
2002/174 21:40:30 MOD_OA03_FR_NIGHT_RATE.2

11.7 Degree Yaw maneuver
2002/174 22:15:27-22:36:25 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/174 22:48:21 MOD_OA03_FR_DAY_RATE.1
2002/174 23:19:23 MOD_OA03_FR_NIGHT_RATE.2

0 Degree Yaw maneuver
2002/175 23:54:20-00:15:18 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/176 00:27:14 MOD_OA03_FR_DAY_RATE.1
2002/176 00:58:12 MOD_OA03_FR_NIGHT_RATE.2

Monday, June 24, 2002
(MET day 51, Day #4 of Yaw Maneuvers)

0 Degree Yaw maneuver
2002/175 11:26:30-11:47:28 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 11:59:24 MOD_OA03_FR_DAY_RATE.1
2002/175 12:30:26 MOD_OA03_FR_NIGHT_RATE.2

2.6 Degree Yaw maneuver
2002/175 13:05:23-13:26:21 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 13:38:16 MOD_OA03_FR_DAY_RATE.1
2002/175 14:09:19 MOD_OA03_FR_NIGHT_RATE.2

5.2 Degree Yaw maneuver
2002/175 14:44:16-15:05:14 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 15:17:09 MOD_OA03_FR_DAY_RATE.1
2002/175 15:48:11 MOD_OA03_FR_NIGHT_RATE.2

7.8 Degree Yaw maneuver
2002/175 16:23:08-16:44:06 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 16:56:02 MOD_OA03_FR_DAY_RATE.1
2002/175 17:27:04 MOD_OA03_FR_NIGHT_RATE.2

10.4 Degree Yaw maneuver
2002/175 18:01:51-18:22:49 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 18:34:55 MOD_OA03_FR_DAY_RATE.1
2002/175 19:05:57 MOD_OA03_FR_NIGHT_RATE.2

13 Degree Yaw maneuver
2002/175 19:40:54-20:01:52 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 20:13:48 MOD_OA03_FR_DAY_RATE.1
2002/175 20:44:50 MOD_OA03_FR_NIGHT_RATE.2

14.3 Degree Yaw maneuver
2002/175 21:19:47-21:40:45 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 21:52:41 MOD_OA03_FR_DAY_RATE.1
2002/175 22:23:43 MOD_OA03_FR_NIGHT_RATE.2

0 Degree Yaw maneuver
2002/175 22:58:40-23:19:38 MOD_OA09_YAW_MAN_OPEN_DBL.1

2002/175 23:31:34 MOD_OA03_FR_DAY_RATE.1
2002/176 00:02:36 MOD_OA03_FR_NIGHT_RATE.2

Nadir Aperture Door Opening:

2002/175 23:21:19-23:23:48 Real Time Opened the NAD MOD_NAD_TO_OPEN
2002/175 23:44:53-23:45:23 Real Time Dumped the CP Table: Door Trigger Positions When Hit MOD_MEM_PM_DUMP('MOTOR_POS_WHEN_HIT',12,0,0,1,1)

Tuesday, June 25, 2002

None

Wednesday, June 26, 2002
(MET day 53, CERES Yaw Maneuvers)
(This is a "piggy back" of the CERES Yaw Maneuvers.)

-0.88 Degree Yaw maneuver
2002/177 14:31:48-14:52:46 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/177 15:04:42 MOD_OA03_FR_DAY_RATE.1
2002/177 15:35:44 MOD_OA03_FR_NIGHT_RATE.2

14.62 Degree Yaw maneuver
2002/177 16:10:41-16:31:39 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/177 16:43:35 MOD_OA03_FR_DAY_RATE.1
2002/177 17:14:38 MOD_OA03_FR_NIGHT_RATE.2

-0.88 Degree Yaw maneuver
2002/177 17:49:33-18:10:31 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/177 18:22:27 MOD_OA03_FR_DAY_RATE.1
2002/177 18:53:29 MOD_OA03_FR_NIGHT_RATE.2

14.62 Degree Yaw maneuver
2002/177 19:28:26-19:49:24 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/177 20:01:20 MOD_OA03_FR_DAY_RATE.1
2002/177 20:32:22 MOD_OA03_FR_NIGHT_RATE.2

-0.88 Degree Yaw maneuver
2002/177 21:07:19-21:28:17 MOD_OA09_YAW_MAN_SCREEN_DBL.1

2002/177 21:40:13 MOD_OA03_FR_DAY_RATE.1
2002/177 22:11:15 MOD_OA03_FR_NIGHT_RATE.2

Thursday, June 27, 2002
(DOY 2002/178 Vdet Sweeps)

2002/178 13:58:15-14:07:59 Real-Time MOD_VDET_SWEEP('SMIR',0,0,102,0,8,16,30)
2002/178 14:08:36-14:10:02 Real-Time MOD_VDET_SWEEP('BOTH',90,184,102,184,0,0,1)

Friday, June 28, 2002

None

This Week's Scheduled MODIS Activities Not Completed:

(The remainder of DOY 2002/178 Vdet Sweeps)

MOD_VDET_SWEEP('SMIR',0,0,102,128,8,15,30)
MOD_VDET_SWEEP('BOTH',90,184,102,184,0,0,1)
MOD_VDET_SWEEP('LWIR',90,0,0,0,8,16,30)
MOD_VDET_SWEEP('BOTH',90,184,102,184,0,0,1)
MOD_VDET_SWEEP('LWIR',90,128,0,0,8,15,30)
MOD_VDET_SWEEP('BOTH',90,184,102,184,0,0,1)

Upcoming MODIS Events:

Transition MODIS to STANDBY and open SVD. Then, go to SCIENCE, enable FMU taxi interface, and open NAD.

The execution time of these activities will be based on when AQUA comes out of SAFE and resolves the software issue that caused the SAFE Mode entry (specifically: when the controllers have their flight software patched).

Maneuvers:

The Deep Space Calibration pitch maneuver(s) have been indefinitely suspended pending mission review.

The next Aqua drag make-up delta-v maneuver is planned for July 3rd.

MODIS Anomalies:

5D/77 CP Event Pairs:
  • 61 pairs have been received total.
  • 23 pairs between the first Turn On (DOY 127) and S/C to Survival Mode (DOY 139).
  • 32 pairs between the second Turn On (DOY 144) and Science Mode Transition (DOY 158).
  • 4 pairs between Science Mode Transition (DOY 158) and Safe Mode Transition (DOY 178).
  • 2 pairs since Safe Mode Transition.
  • The last event pair was seen on DOY 179 at 18:10:36.
5D Single CP Event:
  • No 77 following message, no related MODIS commanding in proximity.
  • 3 single events have been received, times listed below.
  • DOY 162 at 14:16:59 (roughly 92 hours after Science Mode transition).
  • DOY 166 at 20:44:46 (midway between the 10.4 and 13 degree yaw maneuvers, not during).
  • DOY 167 at 14:27:50 (no commands in near proximity).
77 Single CP Event:
  • No 5D preceding message, no related MODIS commanding in proximity.
  • 3 single event has been received, time listed below.
  • DOY 164 at 00:35:39 (64 seconds after CP Macro 9, SDD to Close, in an SD/SDSM Screened, SDSM fixed at Sun, calibration. The macro was still running when the event occurred).
  • DOY 175 at 23:00:04 (84 seconds after CP Macro 11, SDD to Open, in an SD/SDSM Open, SDSM fixed at SD, calibration. The macro was still running when the event occurred).
  • DOY 177 at 21:26:36 (30 seconds after the SDSM was commanded to its home position, in an SD/SDSM Open, SDSM fixed at SD, calibration. The SDSM was still moving when the event occurred).
5D Yaw Maneuver Events:
  • 28 single 5D event messages were observed throughout the SD/SDSM Yaw Maneuvers.
  • Each of these events occurred within 5 to 10 seconds after a sector rotation (to -3400) command for the SD/SDSM calibrations.
  • An event did not occur for every calibration, and some calibrations resulted in two 5D events.

General Instrument Comments:

MODIS is currently in SAFE mode on PS2. Doors are closed.

MODIS Telemetry Trends:

RC temps are warming due to MODIS SAFE mode/doors closed. Blackbody temperatures are yellow low. Survival heaters are cycling the MEM temperatures.

Non-MODIS Significant Events:

At 15:40:44, the AQUA spacecraft performed an unplanned CTC swap from CTCA to CTCB, thereby placing the spacecraft and it's instruments into SAFE mode. Preliminary analysis suggests that there was a single event upset (SEU) in the memory interface controller (MIC), while the spacecraft was in the SAA. The event occurred in a background task. It was either a read/write verify scrub or a checksum scrub in low priority housekeeping tasks. The SEU triggered FSW to check error flags. The FSW check of the error flags incorrectly interprets the state of the flags and thereby performed the unnecessary CTC swap (since the FSW "thought" the error was more serious than it really was). A software patch is being made to correct the FSW problem in all 8 controllers (they each have the same error).

The Aqua status can be viewed online at:
http://jupiter02.gsfc.nasa.gov/links/links.htm

Limited Life Item Status:

SRCA 10W Lamp #1: 203.1 of 500 hours
SRCA 10W Lamp #2: 177.3 of 500 hours
SRCA 10W Lamp #3: 180.1 of 500 hours
SRCA 10W Lamp #4: 57.7 of 500 hours

SRCA 1W Lamp #1: 499.9 of 5000 hours
SRCA 1W Lamp #2: 269.8 of 5000 hours

Solar Diffuser Door: 1754 of 3022 Movements
Nadir Aperture Door: 1048 of 1316 Movements
Space View Door: 627 of 1316 Movements
Responsible Civil Servant: Ed Masuoka

Email the MODIS IOT to report any problem with the MODIS IOT Web Pages.
Email the MCST Webmaster to report any problem with the MCST Web Pages.
Email the MCST Helpdesk to ask a question about Level 1B usage, algorithms or software.

Last Update: Tuesday, 03-Dec-2002 13:08:59 EST

Return to Top

Valid XHTML 1.0! Valid CSS 2.0! Bobby WorldWide Approved 508 Lynx Viewer Confirmed Best Viewed With Any Browser