Earth Observing-1 Advanced Land Imager: Spectral Response Calibration

摘要

An Advanced Land Imager (ALI) will be flown on the first Earth Observing mission(EO-1) under NASA's New Millennium Program (NMP). The focal plane of the ALI contains silicon and non-cryogenic HgCdTe multispectral and panchromatic (MS/Pan) detector arrays with a total of 10 spectral bands spanning the 0.4 to 2.5 um wavelength region. These bands have been defined to correspond with heritage Landsat bands and provide two additional bands centered at 0.44 and 1.25 um. The partially populated focal plane provides a 3deg cross-track coverage corresponding to 37 km on the ground and the focal plane temperature is maintained at 220 K by means of a passive radiator. This document outlines the techniques adopted during spectral calibration of the ALI and presents results derived from subsystem and system level measurements.