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Tracking and data relay satellite system configuration and tradeoff study. Volume 1: TDRS system summary, part 1A Tracking and Data Relay Satellite System (TDRSS) concept for service of low and medium data rate user spacecraft has been defined. The TDRS system uses two geosynchronous dual spin satellites compatible with Delta 2914 to provide command, tracking, and telemetry service between multiple low earth orbiting users and a centrally located ground station. The low data rate user service capability via each TDRS is as follows: (1) forward link at UHF: voice to one user, commands to 20 users (sequential), range and range rate service, and (2) return link at VHF: voice from one user, data from 20 users (simultaneous), range and range rate return signals. The medium data rate user service via each TDRS is as follows: (1) forward link at S band: voice or command and tracking signals to one user, and (2) return link at S band: voice, data and tracking signals from one user "order wire" for high priority service requests (implemented with an earth coverage antenna).
Document ID
19740002692
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Date Acquired
September 3, 2013
Publication Date
September 29, 1972
Subject Category
Space Vehicles
Report/Patent Number
NASA-CR-132845
SCG-20639R
Accession Number
74N10805
Funding Number(s)
CONTRACT_GRANT: NAS5-21704
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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