Topic:   Visible calibration update for month of July 2026 

Date/Time Issued:  July 14 2026 1607Z

Product(s) or Data Impacted:  All products from channels 1, 2, and 3a

Date/Time of Initial Impact:  July 14 2026 12:49Z

Date/Time of Expected End:  Until Next Month's Coefficient Update 

Length of Outage:   N/A

Details/Specifics:

On 14 July 2026 at approximately 12:49 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 July. These coefficients are intended to be optimal on July 28, in the middle of the two scheduled updates.

--------------------------------------------------------------------------------------
Metop-B/1
# Ch_1_lo = 0.05821*count -  2.293, count<500.62
# Ch_1_hi =  0.1725*count -  59.49, count>500.62
# Ch_2_lo = 0.06673*count -  2.694, count<503.00
# Ch_2_hi =  0.1966*count -  68.00, count>503.00
# Ch_3_lo = 0.03374*count -  1.418, count<500.85
# Ch_3_hi =  0.2350*count - 102.21, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05634*count -  2.274, count<498.68
# Ch_1_hi =  0.1651*count -  56.50, count>498.68
# Ch_2_lo = 0.06800*count -  2.785, count<500.01
# Ch_2_hi =  0.1992*count -  68.39, count>500.01
# Ch_3_lo = 0.03370*count -  1.367, count<498.72
# Ch_3_hi =  0.2371*count - 102.82, count>498.72
-------------------------------------------------------------------------------------

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D26195.S0853.E0902.B7171212.GC
NSS.GHRR.M1.D26195.S1049.E1139.B7171313.MM
NSS.HRPT.M3.D26195.S0918.E0927.B3987070.GC
NSS.GHRR.M3.D26195.S0933.E1114.B3987071.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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