- (a) User. Any non-U.S. Government representative or entity that enters into an agreement with NASA to use TDRSS services.
- (b) TDRSS. TDRSS, including Tracking and Data Relay Satellites (TDRS), WSC, GRGT, and the necessary TDRSS operational areas, interface devices, and NASA communication circuits that unify the above into a functioning system. It specifically excludes the user ground system/TDRSS interface.
- (c) Bit stream. The electronic signals acquired by TDRSS from the user craft or the user-generated input commands for transmission to the user craft.
- (d) Scheduling service period. One scheduled contact utilizing a single TDRS, whereby the user, by requesting service, is allotted a block of time for operations between the user satellite and TDRSS.
[77 FR 6952, Feb. 10, 2012]