Topic: Visible calibration update for month of February 2018

Date/Time Issued: February 13, 2018 1615Z

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

Date/Time of Initial Impact: February 13, 2018 1336Z

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

Length of Outage: N/A

Details/Specifics of Change:

On February 13, 2018 at approximately 13:36Z, 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 February. These coefficients are intended to be optimal on February 27, in the middle of the two scheduled updates.

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Metop-B/1

Ch_1_lo = 0.05596*count - 2.204, count<500.62

Ch_1_hi = 0.1658*count - 57.19, count>500.62

Ch_2_lo = 0.06234*count - 2.517, count<503.00

Ch_2_hi = 0.1836*count - 63.53, count>503.00

Ch_3_lo = 0.03232*count - 1.358, count<500.85

Ch_3_hi = 0.2251*count - 97.91, count>500.85

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Metop-A/2

Ch_1_lo = 0.05622*count - 2.273, count<501.01

Ch_1_hi = 0.1661*count - 57.34, count>501.01

Ch_2_lo = 0.06964*count - 2.768, count<500.42

Ch_2_hi = 0.2068*count - 71.43, count>500.42

Ch_3_lo = 0.03426*count - 1.408, count<501.94

Ch_3_hi = 0.2379*count - 103.64, count>501.94

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NOAA-18 AVHRR

Ch_1_lo = 0.06082*count - 2.398, count<501.54

Ch_1_hi = 0.1813*count - 62.36, count>501.54

Ch_2_lo = 0.07158*count - 2.820, count<500.40

Ch_2_hi = 0.2148*count - 74.83, count>500.40

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NOAA-19 AVHRR

Ch_1_lo = 0.05397*count - 2.098, count<496.43

Ch_1_hi = 0.1592*count - 54.72, count>496.43

Ch_2_lo = 0.06279*count - 2.435, count<500.37

Ch_2_hi = 0.1870*count - 64.57, count>500.37

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

NSS.GHRR.NN.D18044.S1526.E1712.B6563435.GC

NSS.HRPT.NN.D18044.S1356.E1409.B6563333.WI

NSS.HRPT.NP.D18044.S1437.E1451.B4647373.FI

NSS.GHRR.NP.D18044.S1226.E1413.B4647273.SV

NSS.LHRR.NP.D18044.S1407.E1418.B4647373.GC

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

NSS.HRPT.M1.D18044.S0949.E0956.B2805555.GC

NSS.FRAC.M1.D18044.S1143.E1234.B2805656.MM

NSS.FRAC.M2.D18044.S1045.E1227.B5874243.SV

NSS.HRPT.M2.D18044.S0516.E0521.B5873939.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

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