Precise spacecraft camera image navigation and registration

Details Precise spacecraft camera image navigation and registration Precise spacecraft camera image navigation and registration

1998-07-23

1999-10-05

Tarcza, Thomas

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342352, 34235706, 701222, G01S 502

Patent

active

059631660

ABSTRACT:
A precise, spacecraft camera image navigation and registration system and method wherein a computer 36 on-board the spacecraft and a ground system comprising at least two ground stations precisely compute image navigation and registration data from precise data measurements. The computer on-board the spacecraft (spacecraft control system) uses precise star tracker, gyro, and earth sensor attitude data to precisely point the spacecraft and the camera. The ground system utilizes precise star measurement data from the camera and range data from the ground stations time tagged with GPS precise clock data. The ground system uses these precise measurements to determine precise orbit and attitude coefficients and uploads these coefficient to the spacecraft. The computer on-board the spacecraft uses these precise coefficients to generate and apply precise signals to compensate for slow orbit and attitude variations and register camera images in real time. The computer on-board the spacecraft is also used to generate camera commands to eliminate the need to upload a large number of daily ground commands, which therefore simplifies ground operations.

REFERENCES:
patent: 3952151 (1976-04-01), Jenkin
patent: 4674715 (1987-06-01), Frisch
patent: 4688092 (1987-08-01), Kamel et al.
patent: 5189295 (1993-02-01), Falbel
patent: 5745869 (1998-04-01), van Bezooijen
patent: 5793813 (1998-08-01), Cleave

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