Automatic astroposition determination apparatus

Details Automatic astroposition determination apparatus Automatic astroposition determination apparatus

1978-02-24

1980-01-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356141, G01J 120

Patent

active

041818512

ABSTRACT:
An automatic astroposition determination apparatus for performing measurets with improved precision and accuracy. A rectangular photosensor array is mounted in the focal plane of a theodolite and as the image of a star moves across the sensor array, a display of the image position and the time elapsed since the commencement of tracking is provided. Circuitry is provided to ensure that the leading edge of the star image on the array is tracked irrespective of how many photosensor elements the image overlies and irrespective of the direction of image transit on the array.

REFERENCES:
patent: 3564257 (1971-02-01), Berry et al.
patent: 3653774 (1972-04-01), La Roche
patent: 3852714 (1974-12-01), Carson

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