DEGRADATION OF INFRARED CAUSED BY CONDENSATION

MOISTURE CONDENSATION ON THE OPTICS OF THERMAL INFRARED SCANNERS CAUSES DEGRADATION OF IMAGERY ACQUIRED UNDER HUMID TROPICAL CONDITIONS. CONDITIONS FAVORABLE TO FORMATION OF CONDENSATION USUALLY OCCUR WHEN THE SURVEY AIRCRAFT DESCENDS FROM A HIGHER TO A LOWER ALTITUDE. DIFFUSE SCATTERING AND ABSORPTION OF INCIDENT ENERGY WILL CAUSE THE RECORDED IMAGERY TO HAVE A MONOTONIC (ISOTHERMAL) APPEARANCE. EXAMPLES OF THERMAL INFRARED IMAGERY, COLLECTED AT DIFFERENT ALTITUDES AND AT DIFFERENT TIMES OF THE DAY, ARE PRESENTED AND ANALYZED. ENLARGEMENTS OF HIGHER ALTITUDE IMAGERY MAY BE SUPERIOR TO THOSE OF LOWER ALTITUDE IMAGERY (AS LONG AS THE IMAGED FEATURE CAN STILL BE RESOLVED AT THE HIGHER ALTITUDE), BECAUSE INCREASE IN DETAIL (THERMAL AND/OR SPATIAL) IS MORE THAN OFFSET BY IMAGERY DEGRADATION CAUSED BY MOISTURE CONDENSATION ON THE SCANNING OPTICS. /PE/

  • Supplemental Notes:
    • Vol 35, No 1, PP 72-78, 13 FIG, 1 PHOT
  • Authors:
    • WILLIAMS, R S
  • Publication Date: 1969-1

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  • Accession Number: 00202762
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 7 1994 12:00AM