The Advanced Land Image Assessment Systems (ALIAS) supports radiometric and geometric image processing for the Advanced Land Imager (ALI) instrument on board NASA's Earth Observing-1 (EO-1) satellite. ALIAS consists of two processing subsystems for radiometric and geometric processing of the ALI's multispectral imagery. The radiometric processing subsystem characterizes and corrects, where ... possible, radiometric qualities including: detector operability; gain; bias; coherent, impulse and random noise; signal-to-noise ratios (SNR); saturation levels; striping and banding; and the stability of detector performance. The geometric processing subsystem and analysis capabilities support sensor alignment calibrations; sensor chip assembly (SCA)-to-SCA alignments and related issues; geodetic accuracy assessments; modulation transfer function (MTF) characterizations; and perform image-to-image characterizations. The ALIAS also characterizes and corrects band-to-band registration, and performs systematic, precision and terrain correction of ALI images. The ALIAS can geometrically correct and automatically mosaic the SCA image strips into a seamless, map-projected image. The ALIAS was developed through collaboration between NASA and the U.S. Geological Survey (USGS).
[Summary provided by NASA.]