Administrative: NOAA-18, 19, MetOp-B/1, & MetOp-C/3 AVHRR, Monthly Visible Calibration Update, 14 November 2023 - Issued: 14 November 2023 20:01 UTC

Topic: Visible calibration update for month of November 2023

Date/Time Issued: November 14 2023 20:01 UTC

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

Date/Time of Initial Impact: November 14 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 14 November 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 November. These coefficients are intended to be optimal on November 28, in the middle of the two scheduled updates.

--------------------------------------------------------------------------------------
Metop-B/1
# Ch_1_lo = 0.05789*count - 2.280, count<500.62
# Ch_1_hi = 0.1715*count - 59.16, count>500.62
# Ch_2_lo = 0.06510*count - 2.629, count<503.00
# Ch_2_hi = 0.1918*count - 66.34, count>503.00
# Ch_3_lo = 0.03320*count - 1.395, count<500.85
# Ch_3_hi = 0.2312*count - 100.57, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05603*count - 2.262, count<498.68
# Ch_1_hi = 0.1642*count - 56.19, count>498.68
# Ch_2_lo = 0.06567*count - 2.689, count<500.01
# Ch_2_hi = 0.1924*count - 66.05, count>500.01
# Ch_3_lo = 0.03333*count - 1.352, count<498.72
# Ch_3_hi = 0.2345*count - 101.67, count>498.72
--------------------------------------------------------------------------------------
NOAA-18 AVHRR
# Ch_1_lo = 0.06130*count - 2.417, count<501.54
# Ch_1_hi = 0.1828*count - 62.86, count>501.54
# Ch_2_lo = 0.07543*count - 2.972, count<500.40
# Ch_2_hi = 0.2263*count - 78.86, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05664*count - 2.202, count<496.43
# Ch_1_hi = 0.1671*count - 57.43, count>496.43
# Ch_2_lo = 0.06841*count - 2.653, count<500.37
# Ch_2_hi = 0.2038*count - 70.34, count>500.37
--------------------------------------------------------------------------------------

The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D23318.S1135.E1139.B9528080.SV
NSS.GHRR.NN.D23318.S0948.E1128.B9527980.SV

NSS.HRPT.NP.D23318.S1131.E1139.B7611717.SV
NSS.GHRR.NP.D23318.S0937.E1128.B7611617.SV

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D23318.S0856.E0906.B5788989.GC
NSS.GHRR.M1.D23318.S0957.E1053.B5788990.SV

NSS.HRPT.M3.D23318.S0951.E0959.B2604747.GC
NSS.GHRR.M3.D23318.S0824.E1005.B2604647.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

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