[Code of Federal Regulations]
[Title 14, Volume 5]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR1215.102]

[Page 143-144]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
                   CHAPTER V--NATIONAL AERONAUTICS AND
                          SPACE ADMINISTRATION
 
PART 1215_TRACKING AND DATA RELAY SATELLITE SYSTEM (TDRSS)--Table of Contents
 
  Subpart 1215.1_Use and Reimbursement Policy for Non-U.S. Government 
                                  Users
 
Sec.  1215.102  Definitions.

    (a) User. Any non-U.S. Government representative or entity who 
contracts with NASA to use TDRSS services.
    (b) TDRSS. The Tracking and Data Relay Satellite System including 
Tracking and Data Relay Satellites (TDRS), the White Sands Ground 
Terminal (WSGT), and the necessary TDRSS operational areas, interface 
devices and NASA communication circuits to unify the above into a 
functioning system. It specifically excludes the user ground system/
TDRSS interface.
    (c) Bit stream. The digital electronic signals acquired by TDRSS 
from the user craft or the user generated input commands for 
transmission to the user craft.
    (d) Flexible support. Support requests which permit NASA, at its 
option, to schedule service at any time during the

[[Page 144]]

period of a single orbit of the user mission. Missions requiring 
multiple support periods during a single orbit may be classified as 
constrained support.
    (e) Constrained support. Support requests which specify the exact 
times NASA is to provide service, or conditions of support which can be 
translated into exact times for service, such as sub-satellite 
positions, apogee/perigee position, etc., for which support is needed.
    (f) 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.