Spectral Radiance of Snow and Clouds in the Near Infrared Spectral Region

The near infrared spectral radiance measurements of snow and cirrus and cumulus cloud backgrounds taken by the Air Force Geophysics Laboratory's flying laboratory are evaluated. From the analysis of the 124 specra obtained, the spectral radiances or reflectance characteristics of snow and cirru...

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Bibliographic Details
Main Author: Valovcin, Francis R.
Other Authors: AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
Format: Text
Language:English
Published: 1978
Subjects:
Meteorology
Snow
Ice and Permafrost
Infrared Detection and Detectors
*INFRARED DETECTION
*SNOW
*DISCRIMINATION
*CIRRUS CLOUDS
*CUMULUS CLOUDS
INFRARED SIGNATURES
RADIANCE
REMOTE DETECTORS
REFLECTANCE
RADIOMETERS
SPECTRUM ANALYSIS
NEAR INFRARED RADIATION
PE62101F
WUAFGL76701302
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA063761
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA063761
Description
Summary:The near infrared spectral radiance measurements of snow and cirrus and cumulus cloud backgrounds taken by the Air Force Geophysics Laboratory's flying laboratory are evaluated. From the analysis of the 124 specra obtained, the spectral radiances or reflectance characteristics of snow and cirrus and cumulus clouds between 5500 and 7000/cm (1.82-1.43 micrometers were determined. Snow/cloud discrimination can be made by utilizing a sensor in the 5500 to 7000/ cm spectral region. Based on the analysis of these data, certain snow/cloud design parameters were identified; that is, slope of the spectral radiance, absolute spectral and/or total radiance, and the location and value of the maximum spectral radiance for the snow and cirrus and cumulus cloud backgrounds. Finally, specific recommendations are made for an optimal operational snow/cloud discrimination radiometer. (Author)

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