Radiometric calibration methods for NOAA AVHRR reflectance channels are reviewed and calibration results for the NOAA-7, -9, and -11 AVHRRs are summmarized. Expressions are provided for the gain values and calibration coefficients of these sensors. Analysis shows that significant errors may results in vegetation index calculations from use of prelaunch calibration values for NOAA-11 AVHRR. The postlaunch calibration methods are briefly discussed.
机构:
Frontier Res Syst Global Change, Hydrol Cycle Res Program, Kanazawa Ku, Kanagawa 2360001, JapanFrontier Res Syst Global Change, Hydrol Cycle Res Program, Kanazawa Ku, Kanagawa 2360001, Japan