UNCERTAINTIES IN THE IN-FLIGHT CALIBRATION OF SENSORS WITH REFERENCE TO MEASURED GROUND SITES IN THE 0.4-1.1 MU-M RANGE

This article describes the error sources for three in-flight sensor ca libration methods used by the Remote Sensing Group of the Optical Scie nces Center at the University of Arizona. The three methods are the re flectance-, improved reflectance-, and radiance-based methods, which a ll reference the earth-atmosphere system. The sources of error or unce rtainty for each method are discussed, and an estimate of the percent uncertainty associated with each source is made for conditions similar to those actually used for calibrations at White Sands, New Mexico. T he results of in-flight calibrations are compared to those of the on-b oard lamp calibration system for a SPOT HRV camera.