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TETR-B was a very small magnetically stabilized satellite instrumented with an s-band transponder to provide training to Apollo ground stations. Its external configuration was an octahedron, 12 in. on each side. It was powered by solar cells mounted on the surfaces which formed the octahedron and nickel cadmium batteries. The instrumentation included the 9.5 watt s-band transponder, a PAM/FM/PM telemeter encoder and 1200 milliwatt VHF transmitter. The spacecraft was built by Thompson Ramo Wooldridge, Inc.

Alternate Names

  • TETR-B
  • 03534

Facts in Brief

Launch Date: 1968-11-08
Launch Vehicle: Delta
Launch Site: Cape Canaveral, United States
Mass: 40.0 kg

Funding Agency

  • NASA-Office of Manned Space Flight (United States)


  • Engineering

Additional Information

Questions or comments about this spacecraft can be directed to: Coordinated Request and User Support Office.



NameRoleOriginal AffiliationE-mail
Mr. Charles H. UnderwoodProject ManagerNASA Goddard Space Flight Center 
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