Sorry, you need to enable JavaScript to visit this website.

MCST Banner Image

am1weekly_2021-233_2021-239

MODIS IOT Terra Weekly Report
Mission Operations Days: 2021/233 through 2021/239
August 21, 2021 00:00:00 GMT to August 27, 2021 23:59:59 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)
Component State(s) Comment
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
  • 10W Lamps - 1, 4 (functional)
  • 10W Lamps - 2, 3 (non-functional)
  • 1W Lamps - 1, 2 (functional)
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
  • CP07 to Survival Mode - No SDD to closed command (1 patch)
  • CP07 to Safe Mode - No FR OFF Command (1 patch)
  • CP07 to Safe Mode - No SDD to closed command (1 patch)
  • CP07 to Science Mode - Turn on FRB instead of FRA (1 patch)
  • CP07 to Outgas and Science Mode - Turn on FRB instead of FRA (1 patch)
  • FR Error Counting and Statistics (2 patches)
  • FR 1000ms time code patches (3 patches)
  • FR Band 5 Gain Change (20 commands)
  • FR BB Ideal Output Values (3 patches)
  • FR A EEPROM KME Fast 1 word patch (1 patch)
  • FR B EEPROM KME Fast 1 word patch (1 patch)
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 21, 2021
---
None

Sunday, August 22, 2021
---
None

Monday, August 23, 2021
--
None

Tuesday, August 24, 2021
---
None

Wednesday, August 25, 2021
---
None

Thursday, August 26, 2021
---
None

Friday, August 27, 2021
---
Lunar Roll Maneuver (-4.8150 degrees)
2021/239 01:21:37 ATC MOD_OA04_NIGHT_RATE.1 (4:53 early, in addition to 02:58 delta time due to implementation of 40/60 BAP, total shift of 07:51 early)
2021/239 01:56:30-02:00:16 ATC MOD_OA08_ROLL_MAN.3
2021/239 02:27:38 ATC MOD_OA03_DAY_RATE.2 (4:53 late, in addition to 03:57 delta time due to implementation of 40/60 BAP, total shift of 08:50 late)

This Week's Scheduled MODIS Activities Not Completed:
---
None

Next Month's Upcoming MODIS Events:
---
August’s routine activities include an SDSM Closed on 2021/229, a Lunar Roll on 2021/239, and an SRCA Radiometric on 2021/242.

Non-routine activities include a Lunar Roll on 2021/239.

Next Week's MODIS Events:
---
Monday, August 30, 2021
---
2021/242  20:06:57-20:07:26  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
2021/242  20:09:57-20:41:22  ATC MOD_OA19_SRCA_FULL_RAD.1
OA-19: SRCA Full Radiometric Calibration.
S/C Night 20:16:16-20:50:03
Data Collect 20:25:58-20:41:21

Maneuvers:
---
Terra Lunar Roll took place on 2021/239.

MODIS Anomalies:
---
MODIS configuration monitor error check tripped with alarm “W_APG_OBSOLETE_ENG_DATA_SENT” at 2021/239 02:13:14, following the Terra lunar roll. This alarm has occurred in the past following lunar roll calibrations. There is no impact to science data and no action needed.

General Instrument Comments:

MODIS is in Science Mode, using all A-side components, but
cross-strapped to Formatter B, with the blackbody nominally maintained at 290K and
the Solar Diffuser Door at the Screened position.

Note that the BlackBody will be maintained at 285K.

Note that a new STS File scheduling procedure was implemented on 2021/122. The STS Files create alternating orbits allowing for coverage of the poles and lengthen Night Rate collection by varying amounts each orbit. As a result of the Terra MODIS PWA failure on 2021/180, the STS procedure was changed on 2021/183 to previous method with consistent 4-orbits using larger delta times to account for buffer space. On 2021/184 at 20:00:00 this change was reverted back to the dynamic procedure using varying daylight times.

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.

https://wapub32.eos.nasa.gov/

Limited Life Item Status:

SRCA 10W Lamp #1: 389.8 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: 145.2 of 500 hours


SRCA 1W Lamp  #1: 592.0 of 4000 hours
SRCA 1W Lamp  #2: 320.5 of 4000 hours


Solar Diffuser Door:    2148 of 3022 Movements
Nadir Aperture Door:    542 of 1316 Movements
Space View Door:        445 of 1316 Movements