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Evaluate the application of ERTS-A data for detecting and mapping snow coverThe author has identified the following significant results. Analysis of ERTS-1 data covering the test sites in the western United States indicate that the MSS-4 and 5 spectral bands are the most useful for detecting and mapping snow cover. Of these two bands, the MSS-5 is the most consistently useful, as snow-covered areas in some MSS-4 images are nearly saturated causing some loss of detail. Snow can be readily detected and can be distinguished from clouds through a number of interpretive keys. At the ERTS-1 resolution, numerous terrestrial features not visible in lower resolution meteorological satellite data can be detected. In addition to various natural features, man-made features such as roads, electric power lines, cultivated fields, and timber cuts are visible. In two cases analyzed for the Salt-Verde Watershed in Arizona, good agreement is observed between the location of the snowline as mapped from the ERTS-1 data and as depicted on aerial snow survey charts compiled within a few days of the ERTS-1 passage. Results indicate that the snowline can be mapped in more detail from ERTS-1 imagery than can be achieved by current aerial survey methods.
Document ID
19730010630
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Barnes, J. C. (Environmental Research and Technology, Inc. Lexington, MA, United States)
Date Acquired
September 2, 2013
Publication Date
March 15, 1973
Subject Category
Geophysics
Report/Patent Number
E73-10361
NASA-CR-130982
BMPR-3
ERT-P-407-4
Accession Number
73N19357
Funding Number(s)
CONTRACT_GRANT: NAS5-21802
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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