Comparative Study of Anomalous Gray-Shade Patterns in DMSP and LANDSAT Imagery.
Abstract
A comparative analysis of anomalous gray-shade patterns is performed using Defense Meteorological Satellite Program (DMSP) and Landsat multispectral imagery. Eight cases are analyzed where anomalous gray-shade patterns associated with reduced visibilities in light fog or haze are detected in DMSP imagery, and where corresponding Landsat data are available. In addition, a detailed theoretical analysis of the effects of water vapor absorption on the imagery is performed. The qualitative results of the imagery analysis indicate that within the anomalous gray-shade patterns as detected in the DMSP imagery, the Landsat MSS-4 (visible band) image will appear more hazy than the longer wavelength Landsat bands. The theoretical analysis indicates that simulated radiances from the DMSP are similar to the Landsat MSS-6 band, rather than to MSS-4. This apparent contradiction can be explained by considering the relative contributions of energy from the different spectral intervals comprising the total DMSP response rather tnan the response function alone; the different spatial resolutions of the DMSP and Landsat sensors may also be a factor. The resuls of the theoretical analysis further suggest that for realistic cases of high humidity and low visibility, it is the aerosol growth, not the growth in water vapor, that increases the radiance measured by the DMSP Very High Resolution (VHR sensor. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1979
- Accession Number
- ADA077902
Entities
People
- Allen J. Bussey
- C. James Bowley
- James C. Barnes
- Ronald G. Isaacs