Topic:
Visible calibration update for month of August 2009
Date/Time(UTC) Message Issued:
4 August 2009, 1700UTC
Satellite(s) Involved:
NOAA-16, 17, 18, 19, & 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 August 2009, Time TBD UTC
Details/Specifics of Change:
The following update of the calibration coefficients are recommended for NOAA-16/17/18/19, METOP-A/2 on 11 August. These coefficients are intended to be optimal on 25 August, in the middle of the two scheduled updates.
NOAA-16 AVHRR
Ch_1_lo = 0.05725*count - 2.207, count<498.96
Ch_1_hi = 0.1671*count - 56.79, count>498.96
Ch_2_lo = 0.06269*count - 2.368, count<500.16
Ch_2_hi = 0.1847*count - 63.39, count>500.16
*******************************************************************************
NOAA-17 AVHRR
Ch_1_lo = 0.05654*count - 2.263, count<501.12
Ch_1_hi = 0.1660*count - 57.11, count>501.12
Ch_2_lo = 0.06808*count - 2.673, count<500.73
Ch_2_hi = 0.2026*count - 70.16, count>500.73
Ch_3_lo = 0.03316*count - 1.398, count<501.37
Ch_3_hi = 0.2324*count - 101.47, count>501.37
*********************************************************************************
NOAA-18 AVHRR
Ch_1_lo = 0.05388*count - 2.124, count<501.54
Ch_1_hi = 0.1606*count - 55.24, count>501.54
Ch_2_lo = 0.06200*count - 2.443, count<500.40
Ch_2_hi = 0.1860*count - 64.82, count>500.40
************************************************************************************
NOAA-19 AVHRR
Ch_1_lo = 0.05098*count - 1.982, count<496.43
Ch_1_hi = 0.1504*count - 51.70, count>496.43
Ch_2_lo = 0.05611*count - 2.176, count<500.37
Ch_2_hi = 0.16712*count - 57.70, count>500.37
*****************************************************************************************
Metop-A/2
Ch_1_lo = 0.05360*count - 2.167, count<501.01
Ch_1_hi = 0.1584*count - 54.67, count>501.01
Ch_2_lo = 0.06330*count - 2.516, count<500.42
Ch_2_hi = 0.1880*count - 64.92, count>500.42
Ch_3_lo = 0.03208*count - 1.318, count<501.94
Ch_3_hi = 0.2228*count - 97.06, count>501.94
********************************************************************************************
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