Topic: Visible calibration update for month of April 2023

Date/Time Issued: April 12, 2023 1309Z

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

Date/Time of Initial Impact: April 11, 2023 1200Z

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

Length of Outage: N/A

Details/Specifics of Change: On 11 April 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 April. These coefficients are intended to be optimal on April 25, 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 = 0.06490*count - 2.620, count<503.00
# Ch_2_hi = 0.1912*count - 66.14, count>503.00
# Ch_3_lo = 0.03315*count - 1.393, count<500.85
# Ch_3_hi = 0.2309*count - 100.43, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05595*count - 2.259, count<498.68
# Ch_1_hi = 0.1639*count - 56.11, 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 = 0.03326*count - 1.349, count<498.72
# Ch_3_hi = 0.2340*count - 101.45, count>498.72
--------------------------------------------------------------------------------------
NOAA-18 AVHRR
# Ch_1_lo = 0.06123*count - 2.414, count<501.54
# Ch_1_hi = 0.1826*count - 62.78, count>501.54
# Ch_2_lo = 0.07525*count - 2.965, count<500.40
# Ch_2_hi = 0.2258*count - 78.67, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05646*count - 2.195, count<496.43
# Ch_1_hi = 0.1666*count - 57.25, count>496.43
# Ch_2_lo = 0.06819*count - 2.645, count<500.37
# Ch_2_hi = 0.2031*count - 70.12, count>500.37
--------------------------------------------------------------------------------------

The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D23101.S1418.E1424.B9221717.WI
NSS.GHRR.NN.D23101.S1216.E1411.B9221617.WI

NSS.HRPT.NP.D23101.S1326.E1340.B7305454.WI
NSS.GHRR.NP.D23101.S1124.E1319.B7305354.WI

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D23101.S0848.E0858.B5480606.GC
NSS.GHRR.M1.D23101.S1045.E1135.B5480707.MM

NSS.HRPT.M3.D23101.S0941.E0950.B2296464.GC
NSS.GHRR.M3.D23101.S0815.E0957.B2296364.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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Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880

Web Site(s) for applicable information: N/A

This message was sent by ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.