Topic: Visible calibration update for month of August 2022

Date/Time Issued: August 09 2022 2003Z

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

Date/Time of Initial Impact: August 09 2022 1200Z

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

Length of Outage: N/A

Details/Specifics of Change:

On August 09 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.

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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

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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

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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

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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

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