NOAA-19, AVHRR, Initial Visible Calibration Correction, 21 April 2009 - Issued: 20 April 2009 1515 UTC

Initial Monthly Visible calibration update

Date/Time(UTC) Message Issued:
20 April 2009, 1515 UTC

Satellite(s) Involved:

Instrument(s) Involved:

Product(s) Involved/Affected:
All Products from channels 1 & 2

Date/Time(UTC) of Initial Implementation:
21 April 2009, Time TBD UTC

Details/Specifics of Change:
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.


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 301-817-3882 operations support
Xiangqian Wu 301-763-8136 x 138 instrument scientist

Web site(s) that contain other relevant information (where applicable): - History of level 1B notices - All user notices - SOCC polar satellite status - AVHRR Operational Calibration coefficients update history