Validation of IEC 2400 GPS Simulator for High Dynamic RTK Applications

Kenneth B. Anthony and Samuel A. Mirsky

Abstract:	GPS receiver performance is ultimately demonstrated during operational use. Certain applications, such as high dynamic missile systems, require too many resources to accomplish a full capability demonstration in an operational environment. All-digital modeling and simulation is often used as a cost effective means to analyze the system and is used as a tool to focus and shape the operational test requirements. Hardware-in-theloop simulation is a hybrid form of modeling and simulation that includes the actual hardware asset in the simulation and models the associated environment. Through this method, a direct evaluation of actual system performance can be obtained, assuming a valid environment model. This paper discusses the process and results associated with the IEC 2400 GPS Satellite Constellation Simulator (SCS) validation conducted by the Guided Weapons Evaluation Facility. The focus of the validation proves the viability of GPS simulation as applied to high dynamic, Real-Time Kinematic (RTK) scoring for missile systems. A detailed look into GPS simulation preparation and calibration is presented to highlight the technical modeling challenges and tradeoffs. Actual open-air test configurations and rationale are also discussed. Finally, a detailed comparison of simulated verses actual open-air results is analyzed for multiple test scenarios. Once validated, the GPS RTK modeling and simulation resource can be utilized to supplement live testing. This will provide system performance evaluation data, at a relatively low cost, with a high degree of confidence.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	572 - 578
Cite this article:	Anthony, Kenneth B., Mirsky, Samuel A., "Validation of IEC 2400 GPS Simulator for High Dynamic RTK Applications," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 572-578.
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