ATTITUDE DETERMINING SYSTEM BY STAR SENSOR

Title:

ATTITUDE DETERMINING SYSTEM BY STAR SENSOR

Document Type and Number:

Japanese Patent JPS6025900

Kind Code:

A

Abstract:

An apparatus for determining attitude of a satellite by using a star sensor includes a ground terminal equipped with a data processing unit and star catalogue, a star sensor, an estimating the unit for estimating attitude of the satellite and a decision unit for deciding the attitude determination mode I or II in dependence on attitude stability of the satellite. In the mode I, angles representative of the satellite attitude are estimated by the estimating unit on the basis of a star sub-catalogue prepared by utilizing a priori information. In the mode II, the attitude angles are estimated by the data processing unit through data transaction with the ground terminal without resorting to the use of the priori information.

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Inventors:

KOSAKA MITSUTAKA
MOURI SATOSHI
KOUNO KATSUMI
SASAKI TOSHIROU
MIYAMOTO SHIYOUJI
NAKAJIMA TAKASHI

Application Number:

JP13432083A

Publication Date:

February 08, 1985

Filing Date:

July 25, 1983

Export Citation:

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Assignee:

HITACHI LTD

International Classes:

G01C21/24; B64G1/36; G01S3/786; G01S5/00; G01S5/16; (IPC1-7): B64G1/36

Attorney, Agent or Firm:

Katsuo Ogawa (1 person outside)

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