Accession Number : AD0732849

Title :   Infrared Temperature Sensing of Snow-Covered Terrain.

Descriptive Note : Technical rept.,

Corporate Author : MONTANA STATE UNIV MOZEMAN

Personal Author(s) : Shafer,Bernard A. ; Super,Arlin B.

Report Date : AUG 1971

Pagination or Media Count : 99

Abstract : The feasibility of remotely monitoring snow surface temperatures was investigated with a Barnes IT-3 infrared thermometer. Much of the work concentrated on determining the vertical emissivity of dry snow in the atmospheric infrared window region between 8 and 14 microns. The emissivity of various snow surface types was measured using an apparatus called an emissivity box. An average emissivity for the freshly fallen snow was found to be 0.975. An analysis of errors in radiometrically obtained snow surface temperatures revealed that the IT-3 is capable of accurately measuring the true surface temperature to within two degrees Celsius for the temperature range experimented. Remote radiometric temperature sensing of snow surfaces appears to offer a potentially useful tool for monitoring surface temperature gradients in arctic environments. (Author)

Descriptors :   (*SNOW, MAPPING), (*MAPPING, INFRARED SCANNING), INFRARED DETECTORS, RADIOMETERS, AIRBORNE, THERMAL RADIATION

Subject Categories : Cartography and Aerial Photography
      Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE