REAL TIME AND DAYLIGHT GEODETIC STELLAR CAMERAS STUDY.
SPACE SYSTEMS LAB INC MELBOURNE FLA
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An investigation is made of observation instruments which can be used as real time and daylight geodetic stellar cameras. A fixed mount, non-image forming, externally scanning, automatic readout FNOA system is found to have the highest figure of merit. Characteristics of general significance are discussed in detail with emphasis on detectors exposed to ambient daylight radiation. Real time data readout is attained by coupling the photoelectric detectors with a timing system. Planes of sight are used instead of lines of sight to derive the image informations. The FNOA system is outlined in its basic concept, and a description is given of the data reduction method. Finally, the expected triangulation accuracies are derived. They are in the order or 1 sec of arc at night and of 2 sec of arc at day for zenith distances of approximately 70 degrees. The limiting factor in the readout accuracy is the shimmer effect generated by atmospheric turbulence. Author