NASA NTRS · 19660000500
Point-source light sensor circuit is insensitive to background light
Abstract
Circuit incorporating a bisynchronous demodulator for an electro-optical star-tracking sensor provides a signal proportional to star intensity without interference from background light in the field of view. The system works best on a sharply focused star image and requires a 50 percent duty cycle.
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Davis, E. S.. 1966-11-01. Point-source light sensor circuit is insensitive to background light. https://ntrs.nasa.gov/citations/19660000500
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