Computer Processing of LANDSAT Digital Data and Sensor Interface Development for Use in New England Reservoir Management.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
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A preliminary analysis of Landsat digital data using the NASA GISS computer algorithms for an 11 February scene of the upper St. John River Basin, Maine, showed that the total radiance of pixels contained in three snow courses varied from 5.34 to 7.74 mWsq. cm sr for a water equivalent of approximately 24.1 cm 9.5 in. of water. This correlation between radiance values and water equivalent of the snowpack still needs to be tested. A multispectral signature was developed with an accuracy of 75 for a wetlands category in the Merrimack River estuary. Low-water reservoir and flood water stages were mapped from grayscale printouts of MSS band 7 for 27 October 1972 and 7 July 1973, respectively, for the Franklin Falls reservoir area, New Hampshire. Two snow pillow transducer systems for measuring the water equivalent of the snowpack in northern Maine were interfaced and field tested. Temperature data from the surface to a depth of 30 m 100 ft were transmitted through the Landsat DCS. Also, a tensiometertransducer system to measure moisture tension and soil volumetric moisture content was successfully interfaced to the Landsat DCS.
- Unmanned Spacecraft