Enhanced GPS Measurements Simulation for Space-oriented Navigation System Design

Abstract At the stage of preliminary scheme and algorithm design for spaceborne navigation systems, a precise and high-fidelity software global positioning system (GPS) simulator is a necessary and feasible testing facility in laboratory environments, with consideration of the tradeoffs where possible. This article presents a software GPS measurements simulator on the L1 C/A code and carrier signal for space-oriented navigation system design. The simulator, coded in MATLAB language, generates both C/A code pseudorange and carrier phase measurements. Mathematical models in the Earth centered inertial (ECI) frame are formulated to simulate the GPS constellation and to generate GPS measurements. A series of efficient measures are investigated and utilized to rationalize the enhanced simulator, in terms of ephemeris data selection, space ionospheric model and range rate calculation, etc. Such an enhanced simulator has been facilitating our current work for designing a space integrated GPS/inertial navigation system (INS) navigation system. Consequently, it will promote our future research on space-oriented navigation system.

[1]  Bradford W. Parkinson,et al.  Global positioning system : theory and applications , 1996 .

[2]  Jack Taylor,et al.  GPS Current Signal-in-Space Navigation Performance , 2005 .

[3]  Takuji Ebinuma,et al.  Precision spacecraft rendezvous using global positioning system : an integrated hardware approach , 2001 .

[4]  Peter Fyfe,et al.  Navstar GPS Space Segment/Navigation User Interfaces (Public Release Version) , 1991 .

[5]  Per Gustavsson,et al.  Development of a MatLab based GPS constellation simulation for navigation algorithm developments , 2005 .

[6]  Michele Grassi,et al.  Ionospheric path delay models for spaceborne GPS receivers flying in formation with large baselines , 2011 .

[7]  Per Enge,et al.  Ephemeris And Clock Navigation Message Accuracy , 1996 .

[8]  Richard A. Brown,et al.  Introduction to random signals and applied kalman filtering (3rd ed , 2012 .

[9]  Per K. Enge,et al.  Global positioning system: signals, measurements, and performance [Book Review] , 2002, IEEE Aerospace and Electronic Systems Magazine.

[10]  John Goodman.  A GPS Receiver Upgrade for the Space Shuttle - Rationale and Considerations , 2004 .

[11]  W. Bertiger,et al.  Ephemeris and Clock Navigation Message Accuracy , 1994 .

[12]  P. Axelrad,et al.  Gps Error Analysis , 1996 .

[13]  Per Enge,et al.  Gps Navigation Algorithms , 1996 .

[14]  J.L. Goodman,et al.  Application of GPS navigation to space flight , 2005, 2005 IEEE Aerospace Conference.

[15]  James J. Spilker,et al.  Satellite Constellation and Geometric Dilution of Precision , 2009 .

[16]  Oliver Montenbruck,et al.  Ionospheric Correction for GPS Tracking of LEO Satellites , 2002, Journal of Navigation.

[17]  E. Glenn Lightsey,et al.  Integrated gps/ins navigation system design for autonomous spacecraft rendezvous , 2003 .

[18]  Michael J. Rycroft,et al.  Understanding GPS. Principles and Applications , 1997 .