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Global Positioning System Simulator Field Operational ProceduresGlobal Positioning System (GPS) simulation is an important activity in the development or qualification of GPS signal receivers for space flight. Because a GPS simulator is a critical resource it is highly desirable to develop a set of field operational procedures to supplement the basic procedures provided by most simulator vendors. Validated field procedures allow better utilization of the GPS simulator in the development of new test scenarios and simulation operations. These procedures expedite simulation scenario development while resulting in scenarios that are more representative of the true design, as well as enabling construction of more complex simulations than previously possible, for example, spacecraft maneuvers. One difficulty in the development of a simulation scenario is specifying various modes of test vehicle motion and associated maneuvers requiring that a user specify some (but not all) of a few closely related simulation parameters. Currently this can only be done by trial and error. A stand-alone procedure that implements the simulator maneuver motion equations and solves for the motion profile transient times, jerk and acceleration would be of considerable value. Another procedure would permit the specification of some configuration parameters that would determine the simulated GPS signal composition. The resulting signal navigation message, for example, would force the receiver under test to use only the intended C-code component of the simulated GPS signal. A representative class of GPS simulation-related field operational procedures is described in this paper. These procedures were developed and used in support of GPS integration and testing for many successful spacecraft missions such as SAC-A, EO-1, AMSAT, VCL, SeaStar, sounding rockets, and by using the industry standard Spirent Global Simulation Systems Incorporated (GSSI) STR series simulators.
Document ID
20020061308
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Kizhner, Semion
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Quinn, David A.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Day, John H.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Aircraft Communications And Navigation
Meeting Information
Meeting: 2002 Institute of Navigation 58th Annual Meeting
Location: Albuquerque, NM
Country: United States
Start Date: June 24, 2002
End Date: June 26, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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