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Landsat Imagery from the University of Alaska Geophysical Institute, GeoData Center

Landsat imagery at the University of Alaska's Geophysical Institute includes data covering Alaska and the surrounding areas since 1972. The collection is comprised primarily of Multispectral Scanner System (MSS) data, although data from the Return Beam Vidicon (RBV) and Thematic Mapper (TM) are also included. The MSS provides repetitive acquisition of high-resolution multispectral data of the earth's surface on a global basis. This sensor package images a 100 nautical mile (185 km) wide swath directly below the satellite as it passes over the Earth. Each scene, or frame of data, covers an area 100 by 100 n. miles in size. The nominal size of a pixel (picture element) for this sensor is 80 meters on a side. Four separate bands (wavelengths) are recorded by the MSS: Green 0.5-0.6 microns Red 0.6-0.7 microns Near IR1 0.7-0.8 microns Near IR2 0.8-1.1 microns Initially data were acquired directly from NASA, and were a subset of the holdings of the EROS Data Center in Sioux Falls, South Dakota. Starting in 1978, additional images were acquired from the Canadian Centre for Remote Sensing. From 1982 to 1991, most of the coverage was acquired by the Geophysical Institute Quick Look Project, which operated recording equipment at the NOAA Gilmore Tracking Station near Fairbanks. Scenes in the database that were acquired by the Quick-Look program are so indicated. Much of this data IS NOT in the EROS Data Center's data base and is therefore UNIQUE to this collection. TM and RBV data included in the collection originally came from NASA, the EROS Data Center or EOSAT, depending on the time of acquisition. Their characteristics are described in the references listed for the collection.

Map of Earth