TERRAIN ANALYSIS BY ELECTROMAGNETIC MEANS. LABORATORY INVESTIGATION ON THE INFRARED EMISSIVITY OF SOILS BELOW A WAVELENGTH OF 7.7 MICRONS

THIS REPORT PRESENTS THE RESULTS OF TESTS USING A PASSIVE INFRARED SCANNING SYSTEM RESPONSIVE TO RADIATION BELOW APPROXIMATELY 7.7 MICRONS TO DETERMINE IF A CORRELATION COULD BE FOUND BETWEEN THE INFRARED EMISSIVITY OF SOILS AND THEIR TRAFFICABILITY PARAMETERS. IT WAS ESTABLISHED THAT A RELATION BETWEEN THE PASSIVE EMISSION OF SOILS AND SOIL SURFACE MOISTURE CONTENT CAN BE MEASURED, BUT CONTRIBUTING FACTORS OTHER THAN SOIL EMISSIVITY WERE ENCOUNTERED. THESE FACTORS WERE SOIL SURFACE TEMPERATURE AND INCIDENT RADIATION ON THE SOIL SURFACE. THESE FACTORS SO INFLUENCED THE MAGNITUDE OF THE NET DETECTED ENERGY THAT THIS MEASUREMENT IS MEANINGLESS, IN TERMS OF SOIL EMISSIVITY, UNLESS THE CONTRIBUTION OF THE OTHER FACTORS IS KNOWN. PROGRESSIVE MODIFICATIONS IN MEASURING TECHNIQUES WERE MADE IN AN ATTEMPT TO ISOLATE THESE COMPONENTS. THE DATA INDICATE THAT THE INFORMATION THAT CAN BE OBTAINED FROM A PASSIVE INFRARED SENSOR USING THE TECHNIQUE DERIVED HEREIN IS NOT SUFFICIENT TO DETERMINE EMISSIVITY VALUES OF TERRAIN WITH SUFFICIENT ACCURACY FOR PRACTICAL APPLICATION. /AUTHOR/

  • Supplemental Notes:
    • No 3-693, REPT 4, 61 PP
  • Authors:
    • Lavecchia, N J
    • Williamson, A N
    • Nikodem, H J
  • Publication Date: 0

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  • Accession Number: 00228951
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:37AM