Administrative: NOAA-18, 19, MetOp-B/1, & MetOp-C/3 AVHRR, Monthly Visible Calibration Update, 12 December 2023 - Issued: 12 December 2023 2043 UTC

Topic: Visible calibration update for month of December 2023

Date/Time Issued: December 12 2023 2043 UTC

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

Date/Time of Initial Impact: December 12 2023 12:00 UTC

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

Length of Outage: N/A

Details/Specifics of Change:

On 12 December 2023 at approximately 12:00 UTC, 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 December. These coefficients are intended to be optimal on December 26, in the middle of the two scheduled updates.

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Metop-B/1
# Ch_1_lo = 0.05792*count - 2.281, count<500.62
# Ch_1_hi = 0.1716*count - 59.20, count>500.62
# Ch_2_lo = 0.06519*count - 2.632, count<503.00
# Ch_2_hi = 0.1920*count - 66.44, count>503.00
# Ch_3_lo = 0.03320*count - 1.395, count<500.85
# Ch_3_hi = 0.2312*count - 100.58, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05607*count - 2.263, count<498.68
# Ch_1_hi = 0.1643*count - 56.22, count>498.68
# Ch_2_lo = 0.06585*count - 2.696, count<500.01
# Ch_2_hi = 0.1929*count - 66.23, count>500.01
# Ch_3_lo = 0.03334*count - 1.353, count<498.72
# Ch_3_hi = 0.2345*count - 101.70, count>498.72
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NOAA-18 AVHRR
# Ch_1_lo = 0.06133*count - 2.418, count<501.54
# Ch_1_hi = 0.1828*count - 62.88, count>501.54
# Ch_2_lo = 0.07551*count - 2.975, count<500.40
# Ch_2_hi = 0.2266*count - 78.94, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05666*count - 2.203, count<496.43
# Ch_1_hi = 0.1672*count - 57.46, count>496.43
# Ch_2_lo = 0.06835*count - 2.651, count<500.37
# Ch_2_hi = 0.2036*count - 70.29, count>500.37
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The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D23346.S1058.E1106.B9567575.SV
NSS.GHRR.NN.D23346.S1044.E1236.B9567576.SV

NSS.HRPT.NP.D23346.S1052.E1100.B7651212.SV
NSS.GHRR.NP.D23346.S1039.E1230.B7651213.SV

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D23346.S0916.E0926.B5828787.GC
NSS.GHRR.M1.D23346.S1017.E1113.B5828788.SV

NSS.HRPT.M3.D23346.S0829.E0840.B2644444.GC
NSS.GHRR.M3.D23346.S0845.E1027.B2644445.SV

Contact Person(s) Name/Email/Phone Number for Questions:
Dejiang.Han Dejiang.Han@noaa.gov 301-817-4119 operations support
Xiangqian Wu 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