EXAMPLES OF REMOTE SENSING APPLICATIONS TO ENGINEERING

THE DIMENSIONS OF REMOTE SENSING INCLUDE: (1) THE SPATIAL DIMENSION, (2) THE SPECTRAL DIMENSION, WHICH INCLUDES POLARIZATION AND LUMINESCENCE, AND (3) THE DIMENSION OF TIME. THE STATE OF THE ART IS SUMMARIZED AND DISCUSSED IN EACH OF THE MAJOR SPECTRAL INCREMENTS AND DIMENSIONS, AND THE ENGINEERING VALUE OF THESE CLASSES OF OBSERVATIONS. SYSTEMS USING THE SPECTRAL/SPATIAL DIMENSIONS OF REMOTE SENSING INCLUDE CAMERAS, OPTICAL-MECHANICAL SCANNERS, AND RADAR AND MICROWAVE IMAGING SYSTEMS. THE FOLLOWING COMMONLY USED SYSTEMS ARE DISCUSSED: PANCHROMATIC PHOTOGRAPH (OR TELEVISION), INFRARED PHOTOGRAPHY (OR TELEVISION), COLOR PHOTOGRAPHY (OR TELEVISION), INFRARED COLOR PHOTOGRAPH (OR TELEVISION) ULTRAVIOLET IMAGERY, MULTISPECTRAL PHOTOGRAPH (OR TELEVISION), INFRARED IMAGERY, MULTISPECTRAL, OPTICAL- MECHANICAL SCANNER IMAGERY, RADAR IMAGERY, AND PASSIVE MICROWAVE IMAGES. SYSTEMS USING THE SPECTRAL DIMENSION ARE NONIMAGING IN THE CONVENTIONAL SENSE AND INCLUDE SPECTROMETERS, RADIOMETERS, AND INTERFEROMETERS. THESE SYSTEMS ARE MORE EASILY CALIBRATED THAN IMAGING SYSTEMS AND MAKE USEFUL ADJUNCTS TO IMAGES. THE FOLLOWING SYSTEMS MAKING USE OF THE SPECTRAL DIMENSION ARE UNDER INTENSIVE STUDY: INFRARED RADIOMETRY, INFRARED SPECTRAL RADIOMETRY, AND PASSIVE MICROWAVE RADIOMETRY. IMAGES SHOWING THE DISTRIBUTION OF LUMINESCING SOLIDS HAVE BEEN PRODUCED USING ACTIVE SYSTEMS THAT ILLUMINATE THE SCENE WITH ULTRAVIOLET LIGHT AND RECORD LUMINESCENCE IN THE ULTRAVIOLET, VISIBLE, OF INFRARED WAVELENGTHS. DETECTORS THAT RECORD ULTRAVIOLET-STIMULATED LUMINESCENCE WITHIN FRAUNHOFER LINES IN THE VISIBLE SPECTRUM ARE BEING READIED FOR FLIGHT TEST. ALL SENSORS CAN BE USED TO ASSESS CHANGE IN OBJECTS WITH TIME, PROVIDED THEIR SUCCESSIVE RECORDS CAN BE EFFICIENTLY COMPARED. COMPARISON OF RADAR IMAGES RECORDING RADAR ENERGY RETURNS IN TWO PLANES OF POLARIZATION HAS RESULTED IN IMPROVED DISCRIMINATION OF MAN-MADE OBJECTS FROM NATURAL BACKGROUNDS AND DIFFERENTIATION OF ROCKS HAVING DIFFERING SURFACE ROUGHNESS. STUDIES SUGGEST THAT OBSERVATIONS OF POLARIZATION/DEPOLARIZATION MAY EVOLVE TO USEFUL TECHNIQUES FOR CLASSIFYING EARTH FEATURES, DEFINING SURFACE CHARACTERISTICS, AND RECOGNIZING WATER POLLUTANTS. THE DEVELOPMENT OF THE LASER AS A COHERENT SOURCE OF LIGHT HAS MADE POSSIBLE SIGNIFICANT ADVANCES IN OPTICAL PROCESSING TECHNIQUES, INCLUDING HOLOGRAPHY.

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 13-21
  • Monograph Title: Remote sensing and its application to highway engineering
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202772
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 28 1994 12:00AM