Topic:
Visible calibration update for month of December
Date/Time(UTC) Message Issued:
3 December 2007, 2045 UTC
Satellite(s) Involved:
NOAA-16, 17, 18, & MetOp-2/A
Instrument(s) Involved:
AVHRR
Product(s) Involved/Affected:
Channel 1, 2, 3a Products
Date/Time(UTC) of Initial Implementation:
11 December 2007, Time TBD UTC
Details/Specifics of Change:
The following are updates of the calibration coefficients of Metop-A/2, NOAA-18/17/16 AVHRR solar reflectance channels. The updates are recommended on Dec. 11 and the coefficients are intended to be optimal on December 25, in the middle of the two scheduled updates.
Again, the updates of NOAA-16 for December 2007 are estimated based on the usable observations acquired before October when solar zenith angles were less than 60 degrees.
--------------------------
Metop-A/2
Ch_1_lo = 0.05255*count - 2.125, count<501.00
Ch_1_hi = 0.1553*count - 53.60, count>501.00
Ch_2_lo = 0.06031*count - 2.397, count<500.00
Ch_2_hi = 0.1791*count - 61.85, count>500.00
Ch_3_lo = 0.03031*count - 1.245, count<502.00
Ch_3_hi = 0.2105*count - 91.69, count>502.00
----------------------------------
NOAA-18 AVHRR
Ch_1_lo = 0.05316*count - 2.096, count<501.00
Ch_1_hi = 0.1585*count - 54.51, count>501.00
Ch_2_lo = 0.06137*count - 2.418, count<500.00
Ch_2_hi = 0.1841*count - 64.16, count>500.00
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NOAA-17 AVHRR
Ch_1_lo = 0.05578*count - 2.232, count<501.12
Ch_1_hi = 0.1638*count - 56.34, count>501.12
Ch_2_lo = 0.06715*count - 2.636, count<500.73
Ch_2_hi = 0.1999*count - 69.21, count>500.73
Ch_3_lo = 0.03242*count - 1.367, count<501.37
Ch_3_hi = 0.2273*count - 99.22, count>501.37
-----------------
NOAA-16 AVHRR
Ch_1_lo = 0.05599*count - 2.159, count<498.96
Ch_1_hi = 0.1634*count - 55.54, count>498.96
Ch_2_lo = 0.06084*count - 2.298, count<500.16
Ch_2_hi = 0.1792*count - 61.52, 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
http://www.oso.noaa.gov/poes/index.htm - SOCC polar satellite status
http://www.oso.noaa.gov/goes/index.htm - SOCC geostationary satellite status
http://www.oso.noaa.gov/daily-news/index.asp - SOCC morning reports
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*
* Emily D. Harrod
* NOAA/NESDIS/OSDPD/IPD
* Computer Operations Branch
* Pre-Product Processing Group
* E/SP11, NSOF, room 1460
* 4231 Suitland Road
* Suitland, Maryland 20746-4304
* USA
* voice 301-817-3882
* fax 301-817-3902
* email Emily.Harrod@noaa.gov
*
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