Topic:
Initial Monthly Visible calibration update
Date/Time(UTC) Message Issued:
22 April 2009, 2030 UTC
Satellite(s) Involved:
NOAA-19
Instrument(s) Involved:
AVHRR
Product(s) Involved/Affected:
All Products from channels 1 & 2
Date/Time(UTC) of Initial Implementation:
22 April 2009, Time 1908 UTC
Details/Specifics of Change:
On 22 April at 1908 UTC the NOAA-19 (NP) visible calibration update for channels 1 and 2 were placed into operations. The first orbits processed are:
NSS.HRPT.NP.D09112.S2047.E2101.B0106363.GC
NSS.GHRR.NP.D09112.S1848.E2043.B0106163.GC
NSS.LHRR.NP.D09112.S1802.E1808.B0106161.GC
************************************ Original Message *************************************
The AVHRR instrument scientist has inserted NOAA-19 into the normal monthly visible calibration updates. The following update is the calibration coefficients recommended for the initial April 2009 update. Please note that these calibration coefficients are derived with the NOAA-18 AVHRR Bi-directional Reflective Distribution Function parameters (BRDF). The operational calibration coefficients for NOAA-19 will mature and become independent of NOAA-18 BRDF parameters in about 18 months.
NOAA-19:
Ch_1_lo = 0.05051*count - 1.9635, count<496.43
Ch_1_hi = 0.1490*count - 51.2197, count>496.43
Ch_2_lo = 0.05346*count - 2.0731, count<500.37
Ch_2_hi = 0.15922*count - 54.969, count>500.37
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.star.nesdis.noaa.gov/smcd/spb/fwu/solar_cal/Op_Cal_AVHRR/Op_Cal_AVHRR.html - AVHRR Operational Calibration coefficients update history