Topic: Visible calibration update for month of May 2026
Date/Time Issued: May 12 2026 2203Z
Product(s) or Data Impacted: All products from channels 1, 2, and 3a
Date/Time of Initial Impact: May 12 2026 12:00Z
Date/Time of Expected End: Until Next Month's Coefficient Update
Length of Outage: N/A
Details/Specifics of Change:
On 12 May 2026 at approximately 12:00Z, 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 May. These coefficients are intended to be optimal on May 26, in the middle of the two scheduled updates.
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Metop-B/1
# Ch_1_lo = 0.05818*count - 2.291, count<500.62
# Ch_1_hi = 0.1724*count - 59.46, count>500.62
# Ch_2_lo = 0.06659*count - 2.689, count<503.00
# Ch_2_hi = 0.1962*count - 67.87, count>503.00
# Ch_3_lo = 0.03372*count - 1.417, count<500.85
# Ch_3_hi = 0.2348*count - 102.15, count>500.85
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Metop-C/3
# Ch_1_lo = 0.05627*count - 2.272, count<498.68
# Ch_1_hi = 0.1649*count - 56.43, count>498.68
# Ch_2_lo = 0.06787*count - 2.779, count<500.01
# Ch_2_hi = 0.1988*count - 68.27, count>500.01
# Ch_3_lo = 0.03369*count - 1.367, count<498.72
# Ch_3_hi = 0.2370*count - 102.76, count>498.72
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For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D26132.S0852.E0902.B7081717.GC
NSS.GHRR.M1.D26132.S0953.E1049.B7081718.SV
NSS.HRPT.M3.D26132.S0923.E0932.B3897575.GC
NSS.GHRR.M3.D26132.S0938.E1119.B3897576.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
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880
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