STAR SENSOR, AND ARTIFICIAL SATELLITE ATTITUDE CONTROL DEVICE USING IT

PROBLEM TO BE SOLVED: To provide a star sensor capable of precisely detecting and controlling the attitude of a satellite and an artificial satellite attitude control device using it by correcting the dark output of a two-dimensional image pickup element by a highly reliable method, precisely detect...

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Bibliographische Detailangaben
Hauptverfasser:	KASHIWASE TOSHIO, SHIMOJI HARUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	AIRCRAFT ANALOGOUS ARRANGEMENTS USING OTHER WAVES AVIATION COLORIMETRY COSMONAUTICS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GYROSCOPIC INSTRUMENTS LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PERFORMING OPERATIONS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RADIATION PYROMETRY RADIO DIRECTION-FINDING RADIO NAVIGATION SURVEYING TESTING TRANSPORTING VEHICLES OR EQUIPMENT THEREFOR
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a star sensor capable of precisely detecting and controlling the attitude of a satellite and an artificial satellite attitude control device using it by correcting the dark output of a two-dimensional image pickup element by a highly reliable method, precisely detecting a star image position, and combining a plurality of image input parts with a signal processing part. SOLUTION: When the solar light reaches a two-dimensional image pickup element 105 through an optical system 102, a ND filter 103 is arranged on the optical path extending from the optical system to the two-dimensional image pickup element to attenuate the light quantity of the solar light passed through the optical system so as to have a proper exposing quantity of the two-dimensional image pickup element. When only a star image is formed on the two-dimensional image pickup element without the solar light, the ND filter is removed from the optical path to directly image the light converged by the optical system on the two-dimensional image pickup element.