Topic: Visible calibration update for month of March 2026 Date/Time Issued: March 10 2026 2156Z Product(s) or Data Impacted: All products from channels 1, 2, and 3a Date/Time of Initial Impact: March 10 2026 12:00 UTC Date/Time of Expected End: Until Next Month's Coefficient Update Length of Outage: N/A Details/Specifics of Change: On 10 March 2026 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 March. These coefficients are intended to be optimal on March 28, in the middle of the two scheduled updates. -------------------------------------------------------------------------------------- Metop-B/1 # Ch_1_lo = 0.05817*count - 2.291, count<500.62 # Ch_1_hi = 0.1723*count - 59.45, count>500.62 # Ch_2_lo = 0.06649*count - 2.685, count<503.00 # Ch_2_hi = 0.1959*count - 67.76, count>503.00 # Ch_3_lo = 0.03353*count - 1.409, count<500.85 # Ch_3_hi = 0.2336*count - 101.59, count>500.85 -------------------------------------------------------------------------------------- Metop-C/3 # Ch_1_lo = 0.05630*count - 2.273, count<498.68 # Ch_1_hi = 0.1650*count - 56.46, count>498.68 # Ch_2_lo = 0.06781*count - 2.777, count<500.01 # Ch_2_hi = 0.1987*count - 68.21, count>500.01 # Ch_3_lo = 0.03368*count - 1.367, count<498.72 # Ch_3_hi = 0.2370*count - 102.75, count>498.72 ------------------------------------------------------------------------------------- For M3, M1 the first orbits processed will be the one running after orbit: NSS.HRPT.M1.D26069.S0852.E0901.B6992222.GC NSS.GHRR.M1.D26069.S0953.E1048.B6992223.SV NSS.HRPT.M3.D26069.S0927.E0936.B3808080.GC NSS.GHRR.M3.D26069.S0943.E1123.B3808081.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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