More Details Added: Found Below

Topic:  Visible calibration update for month of May 2025 
 
Date/Time Issued: May 13, 2025 2123Z
 
Product or Data Impacted: All products from channels 1, 2, and 3a
 
Date/Time of Initial Impact: May 13, 2025 1200Z
 
Date/Time of Expected End: Until Next Month's Coefficient Update
 
Length of the Outage/Event: N/A
 
Details/Specifics of Change: On 13 May 2025 at approximately 1200Z, the following update of the calibration coefficients was implemented in the level 1B processing for NOAA-18, NOAA-19, MetOp-B/1, and MetOp-C/3 for the month of May. These coefficients are intended to be optimal on May 27, in the middle of the two scheduled updates. 

--------------------------------------------------------------------------------------
Metop-B/1
# Ch_1_lo = 0.05809*count -  2.288, count<500.62
# Ch_1_hi =  0.1721*count -  59.37, count>500.62
# Ch_2_lo = 0.06605*count -  2.667, count<503.00
# Ch_2_hi =  0.1946*count -  67.31, count>503.00
# Ch_3_lo = 0.03342*count -  1.404, count<500.85
# Ch_3_hi =  0.2328*count - 101.25, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05648*count -  2.280, count<498.68
# Ch_1_hi =  0.1655*count -  56.63, count>498.68
# Ch_2_lo = 0.06763*count -  2.770, count<500.01
# Ch_2_hi =  0.1982*count -  68.03, count>500.01
# Ch_3_lo = 0.03365*count -  1.365, count<498.72
# Ch_3_hi =  0.2367*count - 102.64, count>498.72
--------------------------------------------------------------------------------------
NOAA-18 AVHRR
# Ch_1_lo = 0.06117*count -  2.412, count<501.54
# Ch_1_hi =  0.1824*count -  62.72, count>501.54
# Ch_2_lo = 0.07595*count -  2.992, count<500.40
# Ch_2_hi =  0.2279*count -  79.40, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05636*count -  2.191, count<496.43
# Ch_1_hi =  0.1663*count -  57.15, count>496.43
# Ch_2_lo = 0.06766*count -  2.624, count<500.37
# Ch_2_hi =  0.2015*count -  69.57, count>500.37
-------------------------------------------------------------------------------------- 

The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D25133.S1105.E1113.B0299393.SV
NSS.GHRR.NN.D25133.S0910.E1102.B0299293.SV

NSS.HRPT.NP.D25133.S1108.E1115.B8382828.SV
NSS.GHRR.NP.D25133.S0913.E1104.B8382728.SV

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D25133.S0903.E0913.B6564646.GC
NSS.GHRR.M1.D25133.S1004.E1059.B6564647.SV

NSS.HRPT.M3.D25133.S0812.E0824.B3380303.GC
NSS.GHRR.M3.D25133.S0829.E1011.B3380304.SV

Contact(s) Person(s): Operations support: Dejiang.Han@noaa.gov (301- 817- 4119)
Instrument scientist: Xiangqian.Wu@noaa.gov (301-683-3601)

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
This notification was sent to ESPC.Notification@noaa.gov mailing list. If you wish to unsubscribe or subscribe to this list, please contact ESPC Help-Desk at ESPCOperations@noaa.gov with your request. Please note: it may take up to two business days to process your request. For any additional information you can reach ESPC at 301-817-3880 (24x7)