Examining planet earth

Details Examining planet earth Examining planet earth

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979s%26t....57..126s&link_type=abstract

Sky and Telescope, vol. 57, Feb. 1979, p.126- 131.

Mathematics

Logic

Earth Surface, Landsat Satellites, Satellite Observation, Space Surveillance (Spaceborne), Data Retrieval, Digital Data, Government Procurement, Microfilms, Multispectral Band Scanners, Satellite-Borne Photography, Synchronous Satellites, Vidicons

Scientific paper

The monitoring of the earth through NASA's three Landsats (first launching: 1972) is described, together with information on present and projected uses of Landsat pictorial data about the earth's surface, its population, vegetation, geology and mineralogy. The most efficient of the three data systems used by Landsats to monitor the planet is the multi-spectral scanner (MSS), a non-photographing sensing device with four spectral regions (between 0.5 and 1.1 microns) which scans narrow swaths of surface and translates the intensities of light into strings of digital data, which are then sent to Goddard Space Flight Center and converted there to black-and- white pictures, with the final processing done at the U.S. Geological Survey's EROS Data Center. Research has shown that most users apply Landsat imagery and digital data to studies of land use, hydrology, agriculture, and geology.

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