Topic:   Visible calibration update for month of March 2023

Date/Time Issued:  March 14, 2023 1745Z

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

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

--------------------------------------------------------------------------------------
Metop-B/1
# Ch_1_lo = 0.05782*count -  2.277, count<500.62
# Ch_1_hi =  0.1713*count -  59.09, count>500.62
# Ch_2_lo = 0.06485*count -  2.619, count<503.00
# Ch_2_hi =  0.1910*count -  66.09, count>503.00
# Ch_3_lo = 0.03314*count -  1.392, count<500.85
# Ch_3_hi =  0.2308*count - 100.39, count>500.85
 --------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05592*count -  2.258, count<498.68
# Ch_1_hi =  0.1639*count -  56.08, count>498.68
# Ch_2_lo = 0.06498*count -  2.661, count<500.01
# Ch_2_hi =  0.1904*count -  65.36, count>500.01
# Ch_3_lo = 0.03317*count -  1.346, count<498.72
# Ch_3_hi =  0.2334*count - 101.20, count>498.72
--------------------------------------------------------------------------------------
NOAA-18 AVHRR
# Ch_1_lo = 0.06127*count -  2.416, count<501.54
# Ch_1_hi =  0.1827*count -  62.82, count>501.54
# Ch_2_lo = 0.07524*count -  2.964, count<500.40
# Ch_2_hi =  0.2258*count -  78.67, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05647*count -  2.195, count<496.43
# Ch_1_hi =  0.1666*count -  57.26, count>496.43
# Ch_2_lo = 0.06824*count -  2.647, count<500.37
# Ch_2_hi =  0.2033*count -  70.17, count>500.37
--------------------------------------------------------------------------------------



The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D23073.S1456.E1511.B9182222.WI
NSS.GHRR.NN.D23073.S1301.E1456.B9182122.WI

NSS.HRPT.NP.D23073.S1220.E1233.B7265858.WI
NSS.GHRR.NP.D23073.S1018.E1213.B7265758.WI

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D23073.S0826.E0837.B5440808.GC
NSS.GHRR.M1.D23073.S1023.E1115.B5440909.MM

NSS.HRPT.M3.D23073.S0920.E0929.B2256666.GC
NSS.GHRR.M3.D23073.S0936.E1116.B2256667.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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