This is the AIRS, AMSU-A, and HSB weekly operations status report for Friday, December 5, 2025 (the end of week 1231 of the Aqua mission).

 
AIRS:  The AIRS instrument remains healthy with all voltages, currents, and temperatures as expected.
AMSU-A1:  AMSU-A1 is healthy except for channels 4, 5, 6, and 7.
AMSU-A2:  AMSU-A2, which provided channels 1 and 2 of the AMSU-A suite, suffered a non-recoverable loss of power on September 24, 2016 and is no longer operational.
HSB:  HSB has been non-operational since February 2003 due to a scanner anomaly.


Instrument activities since previous report:

An AIRS guard test ran on Monday, December 1.  Here is the timeline (UT):
   335/22:58:00 AIRS Guard Test begins (AIRS in CHECKOUT mode)
   335/23:25:00 AIRS back in OPERATE mode

MODIS lunar calibration #253 was executed on Wednesday, December 3.  Here is the timeline (UT):
   337/14:11:00  AIRS put into READY mode prior to Lunar Cal
   337/14:37:00  AIRS back in OPERATE mode

Upcoming events:

1) An AIRS photometric calibration is scheduled for Sunday, December 7.  Here is the timeline (UT):
   341/18:38:00  Photocal Lamp 1 On (S/C night)
   341/18:46:00  Photocal Lamps Off (S/C night)
   341/19:27:00  Photocal Lamp 1 On (S/C day)
   341/19:35:00  Photocal Lamps Off (S/C day)
   341/20:16:00  Photocal Lamp 2 On (S/C night)
   341/20:24:00  Photocal Lamps Off (S/C night)
   341/21:06:00  Photocal Lamp 2 On (S/C day)
   341/21:14:00  Photocal Lamps Off (S/C day)
   341/21:55:00  Photocal Lamp 3 On (S/C night)
   341/22:03:00  Photocal Lamps Off (S/C night)
   341/22:44:00  Photocal Lamp 3 On (S/C day)
   341/22:52:00  Photocal Lamps Off (S/C day)
2) An AIRS guard test is planned for Monday, December 29.  This activity has not been scheduled yet.
3) MODIS Lunar Calibration #254 is planned for Wednesday, December 31.  The AIRS activities for this MLC roll have not been scheduled yet.
4) An AIRS photometric calibration test is planned for Wednesday, January 7.  This activity has not been scheduled yet.

Daily plots of noise levels for each AIRS channel are available on the AIRS webpage at https://airs.jpl.nasa.gov/mission/instrument-operations/.
A link there currently points to where the files are hosted at https://thunder.jpl.nasa.gov/nedt_trends/html/airs_channel_nedt_trends.html.
For each channel there are plots for the whole AIRS mission and for the last 2 months.
Going forward, weekly Ops status updates will be archived at the same webpage above,
and are hosted at https://airsteam.jpl.nasa.gov/report/latest and https://airsteam.jpl.nasa.gov/report/archive/.

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William Mathews  - AIRS Instrument Operations  
NASA / Jet Propulsion Laboratory