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Experiment S-213 selenocentric geodetic reference systemDevelopment 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.
Document ID
19770010029
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Doyle, F. J.
(Geological Survey Reston, Va., United States)
Elassal, A. A.
(National Oceanic and Atmospheric Administration Rockville, MD, United States)
Lucas, J. R.
(National Oceanic and Atmospheric Administration Rockville, MD, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1976
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
NASA-CR-151163
Accession Number
77N16972
Funding Number(s)
CONTRACT_GRANT: NASA ORDER T-1168-B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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