Accession Number : AD0720242

Title :   Antenna Boresight Parameter Estimation.

Descriptive Note : Research rept. Jul-Oct 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF ENGINEERING SCIENCE OPERATIONS

Personal Author(s) : Terasaki,Richard M.

Report Date : 30 DEC 1970

Pagination or Media Count : 32

Abstract : A boresight-calibration test is devised based upon the functional dependence of signal-strength measurements upon the antenna pointing relative to the direction to a ground-based transmitter. Algorithms are herein developed for the estimation of the antenna-boresight orientation relative to the spacecraft-attitude reference axes, the antenna beamwidths, and the boresight signal strength. Expressions for the expected error in the boresight parameter estimation are stated. Results of a computer simulation of the estimation process are included; they agree with the theoretically expected performance. Formulas are included for the transformation of attitude and orbital parameters to determine the antenna-pointing direction. (Author)

Descriptors :   (*SATELLITE ANTENNAS, ALIGNMENT), MATHEMATICAL MODELS, SPACE COMMUNICATIONS, GAIN, ALGORITHMS, LEAST SQUARES METHOD, MATRICES(MATHEMATICS), SATELLITE ATTITUDE

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE