Utilization of snow-enhancement techniques for acquisition of geological and geo-environmental information from ERTS imagery
Snow enhancement is the accentuation of various phenomena on the Earth's surface resulting from the differential accumulation or melting of snow cover, or by the greater contrast provided by snow cover in accentuating vegetative or topographic differences. In this manual, emphasis is given to geological applications of snow enhancement; applications for geo-environmental programs are also described. Snow-enhancement techniques effectively extend the working resolution of ERTS imagery and can benefit users of multi-band aircraft imagery as well. Snow-cover in combination with low-angle solar illumination increases the tonal contrast between surface features and is especially useful for the detection of fractures. Low angle solar illumination emphasizes topographic variations which are not as apparent on imagery acquired with a high sun angle. The lowering of solar altitude by several degrees can significantly augment topographic shadowing in the presence of ground snow cover. 9 references.
- Research Organization:
- Earth Satellite Corp., Washington, DC (USA)
- OSTI ID:
- 5595317
- Report Number(s):
- NP-3910802; ON: DE83910802
- Country of Publication:
- United States
- Language:
- English
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