NASA NTRS · 19730005103
Unmanned spacecraft for research
Abstract
The applications of unmanned spacecraft for research purposes are discussed. Specific applications of the Communication and Navigation satellites and the Earth Observations satellites are described. Diagrams of communications on world-wide basis using synchronous satellites are developed. Photographs of earth resources and geology obtained from space vehicles are included.
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Graves, C. D.. 1972-01-01. Unmanned spacecraft for research. https://ntrs.nasa.gov/citations/19730005103
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