Accession Number : ADA190466

Title :   Satellite UV Image Processing.

Descriptive Note : Scientific rept. no. 4, 1 Jul-10 Sep 87,

Corporate Author : NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA

Personal Author(s) : Rosenberg, Norman

PDF Url : ADA190466

Report Date : 09 Oct 1987

Pagination or Media Count : 56

Abstract : The overall objective of the computer program is the photometric and geometric processing of UV satellite images. The data source is the AIRS scanning UV spectrometer aboard the POLAR BEAR satellite. The processing is designed to provide geographic-mapped images which describe the spatial and temporal variability of airglow and aurora of emitting species. The AIRS data stream provided simultaneous records from 3 detectors received at several ground stations from several passes per day. These total about 1500 useful images from launch to Feb. 1987. The major progress during the report period has been development of programs to accomplish the following: 1) Statistical filtering of low-count images to provide meaningful brightness estimates; 2) Use of observed limb locations to provide attitude correction in daylit images and attitude estimation in night images to provide accurate ground positions; 3) Normalization of airglow based on column path length and solar flux which allows separation of aurora from airglow portions of the images; 4) Multi-band presentation of auroral features which clearly define differences between the location of emitting species. Keywords: Image processing; Attitude determination; Multiple band imaging.

Descriptors :   *AIRGLOW, *ARTIFICIAL SATELLITES, *IMAGE PROCESSING, *SOLAR RADIATION, *ULTRAVIOLET RADIATION, ATTITUDE(INCLINATION), AURORAE, BRIGHTNESS, COMPUTER PROGRAMS, CORRECTIONS, DATA PROCESSING, DETERMINATION, EMISSION, ESTIMATES, EXTREMITIES, FILTERS, FLUX(RATE), GEOMETRY, GROUND STATIONS, IMAGES, LENGTH, NIGHT, PATHS, PHOTOMETRY, POSITION(LOCATION), PROCESSING, RECORDS, SCANNING, SEPARATION, SOURCES, SPECTROMETERS, STATISTICS, SYNCHRONISM

Subject Categories : Ultraviolet Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE