Accession Number : AD0669241

Title :   RADIOMETRIC TRACKING OF SMALL ISLANDS.

Descriptive Note : Memorandum rept.,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Richer,Kenneth A.

Report Date : FEB 1968

Pagination or Media Count : 41

Abstract : Radiometric measurements have been made at 35 GHz to simulate the tracking of a small island by a satellite-borne system. Both absolute temperature and tracking error measurements were made. The simulation was made using a portable tower to attain altitude and microwave absorbing material on a support in the water off Spesutie Island at Aberdeen Proving Ground as a target. It was concluded that with a 10 sec time constant, conical scan tracking with a 10 in. diameter antenna could achieve pointing accuracies of better than 5 mrad of angle if great care were taken to initially align and calibrate the mechanical, electrical, and spatial axes of the system. (Author)

Descriptors :   (*MAPPING, SCIENTIFIC SATELLITES), STABILIZED PLATFORMS, ISLANDS, MILLIMETER WAVES, RADIOMETERS, SIMULATION, CALIBRATION, ALIGNMENT, SPECTRUM SIGNATURES

Subject Categories : Cartography and Aerial Photography
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE