This is the AIRS, AMSU-A, and HSB weekly operations status report for Friday, November 3, 2023 (the end of week 1122 of the Aqua mission). Instrument status: 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: There were no instrument activities this past week. AIRS hardware state: (any changes since previous report are in bold) AIRS Quiet Bus A on AIRS Noisy Bus A on AIRS Survival Bus A on AIRS Quiet Bus B off AIRS Noisy Bus B on AIRS Survival Bus B on Decontamination heater A off Decontamination heater B off Group 2 power on Detector gain tables Optimum gains loaded---Table PM1_ISC_AIR_450_air_gnc_o190919_0 first loaded on October 7, 2019 and effective at approximately 23:18 UT Radiometric calibrator heater on Choke point heater enabled with a set point of 155.56 K Scanner uncaged; scanning using nominal profile Cooler A uncaged, electronics on, compressor on, cold head set point 56.47 K Cooler B uncaged, electronics on, compressor on, cold head set point 56.47 K Focal plane detector modules on Circumvention processing on AIRS software state: Patches: version 11 loaded Macros: version 17 loaded EDC tables: alternates #1, #2, and #4 loaded, nominal EDC table active TMON's: active OpMode: "OPERATE" Op submode: "0" CalFunc bits: All zeroes AMSU-A hardware state: AMSU-A1: On; scanners in full scan mode. Selected space view is #3. Channel 7 has not met noise specifications since launch. Channel 4 was declared non-operational in November 2007 and channel 5 became too noisy to use in early 2013. Channel 6 NeDT is now greater than 1K. Version 5 of the AIRS science software did not use Channel 4 and Version 6 uses neither channel 4 nor channel 5. AMSU-A2 (Channels 1 and 2): Off (survival mode). Receiver temperature is about -10° C, Scan Motor temperature is about -4° C. HSB hardware state: Off (survival mode); scanner stopped at about scan position 38 (about 8 degrees off nadir). TMON 51, which turns on the survival heater at -15 degrees C, is enabled. TMON 52, which turns off the survival heater at 0 degrees C, is disabled. The survival heater is off. Local Oscillator temperatures have stabilized at about +15° C. Upcoming events: 1) An AIRS photometric calibration test is scheduled for Tuesday, November 7. Here is the detailed timeline (UT): 311/21:43:00 Photocal Lamp 3 On (S/C night) 311/21:51:00 Photocal Lamps Off (S/C night) 311/22:32:00 Photocal Lamp 3 On (S/C day) 311/22:40:00 Photocal Lamps Off (S/C day) 2) The special AIRS calibration tests (mentioned in previous reports) are now planned for November 13 - 15. We expect to schedule them in the coming week and provide a more detailed timeline in next week's report. 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/. ================================================================== William Mathews - AIRS Instrument Operations NASA / Jet Propulsion Laboratory