Topic: Visible calibration update for month of March 2018

Date/Time Issued: March 13, 2018 1450Z

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

Date/Time of Initial Impact: March 13, 2018 14:03Z

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

Length of Outage: N/A

Details/Specifics of Change:

On March 13, 2018 at approximately 14:03Z, the following update of the calibration coefficients was implemented in the level 1B processing for NOAA-18, NOAA-19, MetOp-A/2 and MetOp-B/1 for the month of March. These coefficients are intended to be optimal on March 29, in the middle of the two scheduled updates.

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Metop-B/1

Ch_1_lo = 0.05621*count - 2.214, count<500.62

Ch_1_hi = 0.1665*count - 57.45, count>500.62

Ch_2_lo = 0.06249*count - 2.523, count<503.00

Ch_2_hi = 0.1841*count - 63.68, count>503.00

Ch_3_lo = 0.03227*count - 1.356, count<500.85

Ch_3_hi = 0.2248*count - 97.77, count>500.85

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Metop-A/2

Ch_1_lo = 0.05627*count - 2.275, count<501.01

Ch_1_hi = 0.1663*count - 57.39, count>501.01

Ch_2_lo = 0.06968*count - 2.770, count<500.42

Ch_2_hi = 0.2069*count - 71.46, count>500.42

Ch_3_lo = 0.03429*count - 1.409, count<501.94

Ch_3_hi = 0.2381*count - 103.73, count>501.94

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NOAA-18 AVHRR

Ch_1_lo = 0.06089*count - 2.401, count<501.54

Ch_1_hi = 0.1815*count - 62.44, count>501.54

Ch_2_lo = 0.07169*count - 2.824, count<500.40

Ch_2_hi = 0.2151*count - 74.95, count>500.40

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NOAA-19 AVHRR

Ch_1_lo = 0.05401*count - 2.100, count<496.43

Ch_1_hi = 0.1593*count - 54.77, count>496.43

Ch_2_lo = 0.06288*count - 2.439, count<500.37

Ch_2_hi = 0.1873*count - 64.66, count>500.37

The first 1b files produced with the updated CPIDS were:

NSS.HRPT.NN.D18072.S1515.E1527.B6602929.MO

NSS.GHRR.NN.D18072.S1513.E1647.B6602930.GC

NSS.HRPT.NP.D18072.S1416.E1429.B4686868.FI

NSS.GHRR.NP.D18072.S1215.E1402.B4686768.GC

NSS.LHRR.NP.D18072.S1349.E1354.B4686868.GC

For M2 & M1 the first orbits processed will be the one running after orbit:

NSS.HRPT.M1.D18072.S1352.E1405.B2845555.WI

NSS.FRAC.M1.D18072.S1249.E1344.B2845455.SV

NSS.FRAC.M2.D18072.S1106.E1246.B5914041.SV

NSS.HRPT.M2.D18072.S0537.E0542.B5913737.MO

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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