Topic: Visible calibration update for month of March 2025
Date/Time Issued: March 11, 2025 1855Z
Product(s) or Data Impacted: All products from channels 1, 2, and 3a
Date/Time Initial Impact: March 11, 2025 1200Z
Date/Time of Expected End: Until Next Month's Coefficient Update
Length of Event: N/A
Details/Specifics: On March 11, 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 March. These coefficients are intended to be optimal on March 25, in the middle of the two scheduled updates.
Metop-B/1
# Ch_1_lo = 0.05806*count - 2.287, count<500.62
# Ch_1_hi = 0.1720*count - 59.34, count>500.62
# Ch_2_lo = 0.06595*count - 2.663, count<503.00
# Ch_2_hi = 0.1943*count - 67.21, count>503.00
# Ch_3_lo = 0.03341*count - 1.404, count<500.85
# Ch_3_hi = 0.2327*count - 101.21, count>500.85
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Metop-C/3
# Ch_1_lo = 0.05643*count - 2.278, count<498.68
# Ch_1_hi = 0.1653*count - 56.59, count>498.68
# Ch_2_lo = 0.06744*count - 2.762, count<500.01
# Ch_2_hi = 0.1976*count - 67.83, count>500.01
# Ch_3_lo = 0.03364*count - 1.365, count<498.72
# Ch_3_hi = 0.2367*count - 102.63, count>498.72
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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 = 0.07585*count - 2.988, count<500.40
# Ch_2_hi = 0.2276*count - 79.30, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05641*count - 2.193, count<496.43
# Ch_1_hi = 0.1664*count - 57.20, count>496.43
# Ch_2_lo = 0.06776*count - 2.628, count<500.37
# Ch_2_hi = 0.2018*count - 69.68, count>500.37
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The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D25070.S1102.E1107.B0210303.SV
NSS.GHRR.NN.D25070.S0915.E1107.B0210203.SV
NSS.HRPT.NP.D25070.S1058.E1106.B8293838.SV
NSS.GHRR.NP.D25070.S1045.E1236.B8293839.SV
For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D25070.S0906.E0915.B6475151.GC
NSS.GHRR.M1.D25070.S1006.E1103.B6475152.SV
NSS.HRPT.M3.D25070.S0627.E0637.B3290606.MO
NSS.GHRR.M3.D25070.S0833.E1014.B3290809.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):
http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B notices
http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices
http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880
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