Topic:
Visible calibration update for month of January
Date/Time(UTC) Message Issued:
28 December 2007, 2230 UTC
Satellite(s) Involved:
NOAA-16, 17, 18, & MetOp-2/A
Instrument(s) Involved:
AVHRR
Product(s) Involved/Affected:
All Products
Date/Time(UTC) of Initial Implementation:
8 January 2008, Time TBD UTC
Details/Specifics of Change:
The following AVHRR visible calibration coefficients are planned for the monthly January update:
***************************************************
Metop-A/2
Ch_1_lo = 0.05209*count - 2.106, count<501.00
Ch_1_hi = 0.1539*count - 53.13, count>501.00
Ch_2_lo = 0.06143*count - 2.442, count<500.00
Ch_2_hi = 0.1825*count - 63.01, count>500.00
Ch_3_lo = 0.03110*count - 1.278, count<502.00
Ch_3_hi = 0.2160*count - 94.10, count>502.00
******************************************************
NOAA-18 AVHRR
Ch_1_lo = 0.05325*count - 2.100, count<501.00
Ch_1_hi = 0.1588*count - 54.60, count>501.00
Ch_2_lo = 0.06152*count - 2.424, count<500.00
Ch_2_hi = 0.1846*count - 64.32, count>500.00
******************************************************
NOAA-17 AVHRR
Ch_1_lo = 0.05580*count - 2.233, count<501.12
Ch_1_hi = 0.1638*count - 56.36, count>501.12
Ch_2_lo = 0.06704*count - 2.632, count<500.73
Ch_2_hi = 0.1996*count - 69.09, count>500.73
Ch_3_lo = 0.03245*count - 1.368, count<501.37
Ch_3_hi = 0.2275*count - 99.31, count>501.37
**************************************************
NOAA-16 AVHRR
Ch_1_lo = 0.05606*count - 2.161, count<498.96
Ch_1_hi = 0.1636*count - 55.61, count>498.96
Ch_2_lo = 0.06093*count - 2.302, count<500.16
Ch_2_hi = 0.1795*count - 61.61, count>500.16
**************************************************
These coefficients are intended to be optimal on January 26, in the middle of the two scheduled updates.
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