Accession Number : AD0472631

Title :   OPTICAL-ELECTRONIC DIRECTION AND RANGE BETWEEN NON-INTERVISIBLE DISTANT GROUND STATIONS,

Corporate Author : ARMY ENGINEER GEODESY INTELLIGENCE AND MAPPING RESEARCH AND DEVELOPMENT AGENCY FORT BELVOIR VA

Personal Author(s) : Sodano, Emanuel M.

Report Date : AUG 1964

Pagination or Media Count : 19

Abstract : Although this paper develops the theory of new field methods for the determination of range as well as direction, the study was prompted primarily by the problem of observing the directions--which were vulnerable to adverse atmospheric conditions when, as usual, optics are involved. The methods of this paper require that the light's direction be observed from only one of two ground stations, thus involving no optical simultaneity. The connection between the stations is completed by simultaneously measuring their slant ranges from the aerial vehicle by all-weather electronics. In cases where such a procedure might still provide meager data for some of the individual aerial passes, their data may be combined. In addition to the above, other advantages over a method now used by the U. S. Army and Air Force in joint operations are: high accuracy that places simpler or no navigational requirements upon the intermediary aerial vehicle; determination not only of the horizontal azimuth to the unknown station, but its distance and vertical angle as well. Other pertinent characteristics are: irrelevance of the geometry of the ground stations, since there are only two; partial or no atmospheric sounding requirements for the corrections to distances and directions; and alternative of eliminating quadratic parameters from the observation equations. (Author)

Descriptors :   *ARMY RESEARCH), (*RANGE FINDING, DIRECTION FINDING, GEODESICS, ATMOSPHERES, CORRECTIONS, ERRORS, MATHEMATICAL ANALYSIS, OPTICAL TRACKING, THEODOLITES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE