NASA NTRS · 19690063766
Tracking and data relay satellite system.
Abstract
Tracking and Data Relay Satellite System with synchronous orbit satellites to relay data between low altitude earth orbital spacecraft and mission control centers
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Andrus, A. M. G., Barritt, P. F.. 1969-01-01. Tracking and data relay satellite system.. https://ntrs.nasa.gov/citations/19690063766
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