Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stin...7716972d&link_type=abstract
Final Report National Oceanic and Atmospheric Administration, Rockville, MD. Geodetic Research and Development Lab.
Astronomy and Astrophysics
Astronomy
Apollo Project, Laser Altimeters, Lunar Maps, Photogrammetry, Selenography, Data Processing, Extraterrestrial Environments, Panoramic Cameras, Spaceborne Photography, Spacecraft Orbits
Scientific paper
Development and implementation of a photogrammetric system was undertaken to provide accurate selenodetic positions and topographic mapping of all areas overflown by orbital spacecraft. The system was installed in the scientific instrument module (SIM) bay of the Apollo command service module (CSM). In theory, this system provided everything a photogrammetrist could want: the position of each exposure station would be obtained from Earth-based tracking; the orientation of each photograph could be computed from the synchronized stellar exposure and the lock-angles determined by preflight calibration; and the scale of each stereomodel would be obtained directly from the altimeter data. Operationally, the data acquisition was adequate, but less than optimum. Systematic errors are believed to be the result of the primitive orbit determination procedures in use at the time of the Apollo 15 mission, inadequate models of the lunar gravity field, and spacecraft oscillations induced by uncoupled thrusting and various activities of the astronauts.
Doyle Frederick J.
Elassal A. A.
Lucas R. J.
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