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NOAA-16, 17, 18, & MetOp-2/A, AVHRR, Monthly Visible Calibration Update, 11 March2008 - Issued: 27 February 2008; 1320 UTC

Topic:
Visible calibration update for month of March 2008

Date/Time(UTC) Message Issued:
27 February 2008, 1320 UTC

Satellite(s) Involved:
NOAA-16, 17, 18, & MetOp-2/A

Instrument(s) Involved:
AVHRR

Product(s) Involved/Affected:
All Products from channels 1, 2, and 3a.

Date/Time(UTC) of Initial Implementation:
11 March 2008, Time TBD UTC

Details/Specifics of Change:

Followings are the AVHRR calibration coefficients to be updated on March 11, 2008. These coefficients are intended to be optimal on March 25, in the middle of the two scheduled updates.

---------------------------------------------------------
Metop-A/2

Ch_1_lo = 0.05239*count - 2.118, count<501.00
Ch_1_hi = 0.1548*count - 53.43, count>501.00

Ch_2_lo = 0.06133*count - 2.438, count<500.00
Ch_2_hi = 0.1821*count - 62.90, count>500.00

Ch_3_lo = 0.03097*count - 1.273, count<502.00
Ch_3_hi = 0.2151*count - 93.71, count>502.00

-------------------------------------------------------------
NOAA-18 AVHRR

Ch_1_lo = 0.05332*count - 2.102, count<501.00
Ch_1_hi = 0.1590*count - 54.67, count>501.00

Ch_2_lo = 0.06140*count - 2.419, count<500.00
Ch_2_hi = 0.1842*count - 64.19, count>500.00

---------------------------------------------------------
NOAA-17 AVHRR

Ch_1_lo = 0.05594*count - 2.239, count<501.12
Ch_1_hi = 0.1642*count - 56.51, count>501.12

Ch_2_lo = 0.06730*count - 2.642, count<500.73
Ch_2_hi = 0.2003*count - 69.36, count>500.73

Ch_3_lo = 0.03251*count - 1.371, count<501.37
Ch_3_hi = 0.2279*count - 99.50, count>501.37

-------------------------------------------------------
NOAA-16 AVHRR

Ch_1_lo = 0.05618*count - 2.166, count<498.96
Ch_1_hi = 0.1640*count - 55.72, count>498.96

Ch_2_lo = 0.06111*count - 2.308, count<500.16
Ch_2_hi = 0.1800*count - 61.79, count>500.16

Contact Person(s) Name/Email/Phone Number for Questions:
Emily Harrod Emily.Harrod@noaa.gov 301-817-3882 operations support
Xiangqian Wu Xiangqian.Wu@noaa.gov 301-763-8136 x 138 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


ppp@nesdis.noaa.gov

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