VARIABLE POLARIZATION FOR SUPPRESSING SIGNAL INTERFERENCE (JAMMING) AND GROUND SWING (MULTIPATH) IN SURVEYING WITH MICROWAVE DISTANCE MEASURING EQUIPMENT

SIGNAL INTERFERENCE (JAMMING) AND GROUND SWING (MULTIPATH) ARE WELL KNOWN PROBLEMS FACED BY SURVEYORS AND GEODESISTS USING MICROWAVE DISTANCE MEASURING EQUIPMENT (MDME). THEY AFFECT BOTH CIVILIAN AND MILITARY USERS OF MDME. THE CIVILIAN SURVEYOR IS AFFECTED BY MANY SOURCES OF SIGNAL INTERFERENCE, USUALLY OF SPURIOUS, UNANTICIPATED AND/OR ACCIDENTAL ORIGIN. IN ADDITION, THERE IS THE PROBLEM OF GROUND SWING (MULTIPATH) WHICH CAN AFFECT ALL MDME. WHILE THIS IS NOT USUALLY A "LIFE OR DEATH" SITUATION, IT CAN BE COSTLY TO THE SURVEYOR IN TERMS OF TIME, MONEY, AND ACCURACY OF WORK. FIELD TRIPS CAN BE ABORTED BECAUSE OF THESE UNDESIRABLE FACTORS. SURVEYING WITH MDME IN A MILITARY ENVIRONMENT CAN BE PREVENTED ENTIRELY BY SIGNAL INTERFERENCE DUE TO DELIBERATE JAMMING BY THE ENEMY OR INADVERTED JAMMING BY FRIENDLY EQUIPMENT, SUCH AS, RADAR, AND COMMUNICATIONS TRANSMITTERS, AND SPURIOUS SOURCES OF VARIOUS ORIGINS. THIS CAN BE A RECIPROCAL EFFECT BECAUSE MDME CAN INTERFERE WITH FRIENDLY RADAR AND COMMUNICATION RECEIVERS. THIS PAPER DESCRIBES THE POTENTIAL OF VARIABLE POLARIZATION FOR SUPPRESSING BOTH SIGNAL INTERFERENCE AND GROUND SWING. VERTICAL, HORIZONTAL, 45 DEGREE, AND CIRCULAR POLARIZATIONS ARE DESCRIBED. /AUTHOR/

  • Corporate Authors:

    American Congress on Surveying and Mapping

    5410 Grosvenor Lane, Suite 100
    Bethesda, MD  USA  20814
  • Authors:
    • Hannigan, J F
  • Publication Date: 1973-10

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Filing Info

  • Accession Number: 00203065
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 1974 12:00AM