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- W3183267809 abstract "A single-axis star sensor is described in which a wave plate having direction-dependent retardation, together with an electro-optic modulator, provides the basis for indicating the direction of a distant point source of light. An alternating current photosignal is obtained, thus avoiding problems associated with detector drift. An analysis of the nominal sensor performance is compared with measurement and found to be in good agreement. The effect of varying the optical geometry on field of view is calculated. The effective noise input is evaluated. Satisfactory tracking of a + 1 magnitude star with a 1 cm aperture and a photomultiplier detector was demonstrated, showing a signal-to-noise ratio of about 50 on an rms basis." @default.
- W3183267809 created "2021-08-02" @default.
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- W3183267809 date "1971-08-16" @default.
- W3183267809 modified "2023-10-02" @default.
- W3183267809 title "An electro-optic direction sensor" @default.
- W3183267809 doi "https://doi.org/10.2514/6.1971-966" @default.
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