Accession Number : AD0698094

Title :   A HIGH ACCURACY FINE SUN SENSOR.

Descriptive Note : Technical rept.,

Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s) : Brookman,A. K.

Report Date : JUL 1969

Pagination or Media Count : 29

Abstract : Design and constructional details are given for a sensor suitable for fine guidance of sun pointing space vehicles. Factors affecting the accuracy and stability of the sensor are discussed and optimum values for certain critical parameters suggested for Skylark and satellite applications. Bias error measurement methods are described and it is concluded that, because of atmospheric turbulence, results using the real sun are unreliable; an alternative method using a solar simulator is presented which has given results repeatable to about 2 arc sec. (Author)

Descriptors :   (*SPACECRAFT, *ATTITUDE CONTROL SYSTEMS), (*DETECTORS, DESIGN), SOUNDING ROCKETS, SATELLITES(ARTIFICIAL), ALIGNMENT, SOLAR CELLS, OPTICS, TARGET RECOGNITION, ACCURACY, RELIABILITY, ERRORS, ATMOSPHERIC MOTION, SOLAR DISTURBANCES, STABILITY, GREAT BRITAIN

Subject Categories : Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE