TEST AND EVALUATION PROCEDURES FOR GPS USER EQUIPMENT (USER EQUIPMENT)

S. K. Gupta

Peer Reviewed

Abstract: Three major contractors, Collins Avionics and Missiles Division of Rockwell International, Magnavox, and Texas Instruments are currently involved in the development of a number of GPS user equipments. These will be flight tested to obtain a comprehensive evaluation of the GPS concept in the first phase of the program. However, prior to flight testing, a complete performance evaluation of these systems in the laboratory has been planned and for some systems, it is already in progress. To accomplish this objective, a number of SV signal generators and simulators have been designed and built, either under contract from the various administrative agencies or by the user equipment developers with private funding. These signal simulator systems provide a precise simulation of the satellite signals as received by the user equipment at its antenna. The effects of user vehicle dynamics, satellite motion and the atmospheric anomalies are precisely simulated. In the case of testing the high performance user equipment like the Generalized Development Model (GDM) system, the signal simulator also provides simulation of other auxiliary subsystems such as the INS system of the user vehicle. This paper describes the requirements and procedures employed in the pre-flight laboratory testing of the various user systems.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 25, Number 2
Pages: 211 - 216
Cite this article: Gupta, S. K., "TEST AND EVALUATION PROCEDURES FOR GPS USER EQUIPMENT (USER EQUIPMENT)", NAVIGATION, Journal of The Institute of Navigation, Vol. 25, No. 2, Summer 1978, pp. 211-216.
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