Skip to main content

MCST Banner Image

am1weekly_2002-054_2002-060

Mission Operations Days: 2002/054 to 2002/060
February 23, 2002 00:00:00 GMT to March 01, 2002 00:00:00 GMT


Terra Spacecraft and MODIS Instrument Status:

AM-1 "Terra" is in Normal Mode
PFM 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 + 4 set of patches
  • FR Error Counting (2 patches)
  • FR 1000ms time code patches (3 patches)
  • FR Band 5 Gain Change (20 commands)
  • FR BB Ideal Output Values (1 patch)
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:

Friday, February 22, 2002

2002/053 23:11:18 Real-time FR Unique Error Address Dump MOD_MEM_DUMP(6,16,45312,0,1,1)
2002/053 23:12:29 Real-time FR Unique Error Address Counts Dump MOD_MEM_DUMP(6,16,45568,0,1,1)
2002/053 23:13:44 Real-time FR Unique Error Address Clearing Load, MOD_MEM_LOAD('AM1_MPR_MODIS_FR_P_C_C_1',16,'N','DISABLE',1,1)
2002/053 23:14:34 Real-time FR Unique Error Address Counts Clearing Load, MOD_MEM_LOAD('AM1_MPR_MODIS_FR_P_C_C_2',16,'N','DISABLE',1,1)
2002/053 23:15:19 Real-time FR Unique Error Address Dump (Clearing Load Verification) MOD_MEM_DUMP(6,16,45312,0,1,1)
2002/053 23:16:22 Real-time FR Unique Error Address Counts Dump (Clearing Load Verification) MOD_MEM_DUMP(6,16,45568,0,1,1)
2002/053 23:22:16 Real-time Disables yellow alarm on unique FR Address Log Count MOD_ALARMS_CP_ST_06('DISABLE')

Saturday, February 23 2002

None

Sunday, February 24, 2002

None

Monday, February 25, 2002

2002/056 18:31:53 Real-Time FS1_EXEC_INHIB_ID_SET(34) Prevents the commands to move the MODIS NAD and SVD.
2002/056 18:32:58 Real-Time FS1_EXEC_INHIB_ID_SET(58) Prevents the commands to power on the MODIS Door Driver.

(These inhibits are in place in case the IAM had not executed correctly.)

Tuesday, February 26, 2002

Terra Inclination Adjust Maneuver #3
2002/057 14:43:00 ATC Low Fidelity Pointing
2002/057 15:14:44 Real-Time Slew Out, Start
2002/057 15:22:14 Real-Time Slew Out, Stop
2002/057 15:24:44 Real-Time Burn, Start
2002/057 15:30:04 Real-Time Burn, Stop
2002/057 15:35:02 ATC Slew Back, Start
2002/057 15:42:32 ATC Slew Back, Stop
2002/057 16:13:00 Real-Time High Fidelity Pointing

Wednesday, February 27, 2002

2002/058 21:22:15-21:35:26 ATC OA16: SDSM SCREENED (fixed at Sun View) side A
2002/058 23:01:07-23:14:18 ATC OA15: SDSM OPEN (fixed at SD View) side A

Thursday, February 28, 2002

2002/059 23:12:51 Real-time Disable Unique FR Error Counter yellow alarm MOD_ALARMS_CP_ST_06('DISABLE')
2002/059 23:13:14 Real-time FR Unique Error Address Dump MOD_MEM_DUMP(6,16,45312,0,1,1)
2002/059 23:14:10 Real-time FR Unique Error Address Counts Dump MOD_MEM_DUMP(6,16,45568,0,1,1)
2002/059 23:15:15 Real-time FR Unique Error Address Clearing Load MOD_MEM_LOAD('AM1_MPR_MODIS_FR_P_C_C_1',16,'N','DISABLE',1,1)
2002/059 23:15:58 Real-time FR Unique Error Address Counts Clearing Load MOD_MEM_LOAD('AM1_MPR_MODIS_FR_P_C_C_2',16,'N','DISABLE',1,1)
2002/059 23:16:33 Real-time FR Unique Error Address Dump (Clearing Load Verification) MOD_MEM_DUMP(6,16,45312,0,1,1)
2002/059 23:17:27 Real-time FR Unique Error Address Counts Dump (Clearing Load Verification) MOD_MEM_DUMP(6,16,45568,0,1,1)

Friday, March 1, 2002

None

This Week's Scheduled MODIS Activities Not Completed:

Tuesday, February 26,2002

2002/057 15:43:24-15:44:35 ATC MOD_CLOSE_NAD_SVD.1 Contingency closing of the NAD and SVD for Inclination Adjust Maneuver. (This activity was inhibited via an onboard TMON since the IAM was successful.)

Upcoming Week's MODIS Events:

Sunday, March 3, 2002

MODIS Lunar Roll
2002/062 07:12:11-07:18:41 Data Collection, -13.0011 degrees Roll Angle
2002/062 07:03:52 ATC MOD_OA04_NIGHT_RATE.1 FR Rate to NIGHT 00:03:23 EARLIER than normal. (This maintains 50/50 Day:Night data rate.)
2002/062 07:12:03-07:18:49 ATC MOD_OA08_ROLL_MAN.3
07:12:03 FR Rate to Day
07:12:05 FR Science ABNORMAL Flag Set
07:12:07 FR PC DCR turned OFF
07:12:09 FR PV DCR turned OFF
07:12:11 FR Encoder Delta offset -3072 counts
07:18:41 FR Encoder Delta reset to 0 offset
07:18:43 FR PV DCR turned ON
07:18:45 FR PC DCR turned ON
07:18:47 FR Science NORMAL Flag Set
07:18:49 FR Rate to Night
2002/062 08:00:04 ATC MOD_OA03_DAY_RATE.1 FR Rate to DAY 00:03:23 LATER than normal. (This maintains 50/50 Day:Night data rate.)

Tuesday, March 5, 2002

2002/064 15:48:50-15:50:31 ATC MOD_CLOSE_NAD_SVD.1 IAM Contingency to close the SVD and NAD before S/C Dawn. (This activity is scheduled -00:01:40 prior to S/C_Night/Day on orbit 11771, sequence 1, with a duration of 101 seconds.)

Maneuvers:

The next MODIS Lunar Calibration via a spacecraft roll maneuver is scheduled for March 3rd, 2002 (DOY 2002/062) with data collection from 07:12:11 to 07:18:41 GMT. The roll angle will be -13.0011 degrees.

There has been a change to the Terra inclination maneuver schedule. A new constraint has been imposed to have the maneuvers completed prior to the launch of the Aqua spacecraft (currently April 18, 2002). The (remaining) new inclination maneuver dates are March 5th, March 19th, and April 4th, 2002. This new plan violates a previous constraint of not performing more than two maneuvers in any 7-week period. Therefore, Flight Dynamics products for dates beyond the next two maneuvers will have inaccuracies.

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 Formatter Error Rate is still increasing with a buffer rollover time of about five hours and thirty minutes. The current error-logging plan to only monitor the first 15 noted addresses was deemed the best monitoring approach at present. Therefore, the current limit of 15 address will continue to be used, the buffers will be dumped and cleared at the point that they fill the 15 address limit in the future.

Error tracking spreadsheets have been updated and 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_MMDDYY.xls contains the data for the times each of the error count "roll over" occurs (with the MMDDYY denoting the date the spreadsheet was made, the more recent date containing the most up-to-date information).

General Instrument Comments:

MODIS is in Science Mode on the A-side with the SVD and NAD open, operating with the Formatter Resolution Flight Software Patches (FRFSP) and a Formatter Time Code Patch.

MODIS Telemetry Trends:

No abnormal telemetry trends are being observed.

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: 195.9 of 500 hours
SRCA 10W Lamp #2: 149.0 of 500 hours
SRCA 10W Lamp #3: 158.2 of 500 hours
SRCA 10W Lamp #4: 61.5 of 500 hours

SRCA 1W Lamp #1: 559.0 of 4000 hours
SRCA 1W Lamp #2: 276.3 of 4000 hours

Solar Diffuser Door: 1817 of 3022 Movements
Nadir Aperture Door: 534 of 1316 Movements
Space View Door: 437 of 1316 Movements