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Administrative: NOAA-18, 19, MetOp-B/1, & MetOp-C/3 AVHRR, Monthly Visible Calibration Update, 9 August 2022 - Issued: 9 August 2022 2003 UTC

Topic: Visible calibration update for month of August 2022

Date/Time Issued: August 9 2022 2003 UTC

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

Date/Time of Initial Impact: August 9 2022 12:00 UTC

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

Length of Outage: N/A

Details/Specifics of Change:

On 9 August 2022 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 August. These coefficients are intended to be optimal on August 27, in the middle of the two scheduled updates.

--------------------------------------------------------------------------------------
Metop-B/1
# Ch_1_lo = 0.05766*count - 2.271, count<500.62
# Ch_1_hi = 0.1708*count - 58.93, count>500.62
# Ch_2_lo = 0.06456*count - 2.607, count<503.00
# Ch_2_hi = 0.1902*count - 65.79, count>503.00
# Ch_3_lo = 0.03307*count - 1.389, count<500.85
# Ch_3_hi = 0.2303*count - 100.17, count>500.85
--------------------------------------------------------------------------------------
Metop-C/3
# Ch_1_lo = 0.05571*count - 2.249, count<498.68
# Ch_1_hi = 0.1632*count - 55.87, count>498.68
# Ch_2_lo = 0.06416*count - 2.628, count<500.01
# Ch_2_hi = 0.1880*count - 64.54, count>500.01
# Ch_3_lo = 0.03306*count - 1.341, count<498.72
# Ch_3_hi = 0.2326*count - 100.85, count>498.72
--------------------------------------------------------------------------------------
NOAA-18 AVHRR
# Ch_1_lo = 0.06146*count - 2.423, count<501.54
# Ch_1_hi = 0.1833*count - 63.02, count>501.54
# Ch_2_lo = 0.07528*count - 2.966, count<500.40
# Ch_2_hi = 0.2259*count - 78.70, count>500.40
-------------------------------------------------------------------------------------
NOAA-19 AVHRR
# Ch_1_lo = 0.05619*count - 2.184, count<496.43
# Ch_1_hi = 0.1658*count - 56.97, count>496.43
# Ch_2_lo = 0.06766*count - 2.624, count<500.37
# Ch_2_hi = 0.2015*count - 69.57, count>500.37
--------------------------------------------------------------------------------------

The first 1b files produced with the updated CPIDS were:
NSS.HRPT.NN.D22221.S1506.E1522.B8875858.WI
NSS.GHRR.NN.D22221.S1313.E1506.B8875758.WI

NSS.HRPT.NP.D22221.S1154.E1206.B6959494.WI
NSS.GHRR.NP.D22221.S0952.E1147.B6959394.WI

For M3, M1 the first orbits processed will be the one running after orbit:
NSS.HRPT.M1.D22221.S0815.E0827.B5132525.GC
NSS.GHRR.M1.D22221.S1012.E1104.B5132626.MM

NSS.HRPT.M3.D22221.S0910.E0919.B1948383.GC
NSS.GHRR.M3.D22221.S0925.E1106.B1948384.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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ppp@nesdis.noaa.gov

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