Topic: Visible calibration update for month of November 2025 Date/Time Issued: November 12 2025 1422Z Product(s) or Data Impacted: All products from channels 1, 2, and 3a Date/Time of Initial Impact: November 11 2025 12:00 UTC Date/Time of Expected End: Until Next Month's Coefficient Update Length of Outage: N/A Specifics of Change: On 11 November 2025 at approximately 12:00 UTC, the following update of the calibration coefficients was implemented in the level 1B processing for MetOp-B/1, and MetOp-C/3 for the month of November. These coefficients are intended to be optimal on November 25, in the middle of the two scheduled updates. -------------------------------------------------------------------------------------- Metop-B/1 # Ch_1_lo = 0.05813*count - 2.289, count<500.62 # Ch_1_hi = 0.1722*count - 59.41, count>500.62 # Ch_2_lo = 0.06623*count - 2.674, count<503.00 # Ch_2_hi = 0.1951*count - 67.50, count>503.00 # Ch_3_lo = 0.03348*count - 1.407, count<500.85 # Ch_3_hi = 0.2332*count - 101.44, count>500.85 -------------------------------------------------------------------------------------- Metop-C/3 # Ch_1_lo = 0.05638*count - 2.276, count<498.68 # Ch_1_hi = 0.1652*count - 56.54, count>498.68 # Ch_2_lo = 0.06762*count - 2.769, count<500.01 # Ch_2_hi = 0.1981*count - 68.01, count>500.01 # Ch_3_lo = 0.03366*count - 1.366, count<498.72 # Ch_3_hi = 0.2368*count - 102.69, count>498.72 ------------------------------------------------------------------------------------- For M3, M1 the first orbits processed will be the one running after orbit: NSS.HRPT.M1.D25315.S0804.E0815.B6823131.GC NSS.GHRR.M1.D25315.S1002.E1052.B6823232.MM NSS.HRPT.M3.D25315.S0848.E0859.B3638989.GC NSS.GHRR.M3.D25315.S0904.E1046.B3638990.SV Contact Person(s) Name/Email/Phone Number for Questions: Dejiang.Han Dejiang.Han@noaa.gov <mailto:Dejiang.Han@noaa.gov> 301-817-4119 operations support Xiangqian Wu Xiangqian.Wu@noaa.gov <mailto:Xiangqian.Wu@noaa.gov> 301-683-3601 instrument scientist Web site(s) that contain other relevant information (where applicable): https://www.ospo.noaa.gov/operations/messages.html - All user notices https://www.ospo.noaa.gov/operations/poes/status.html - SOCC polar satellite status
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