Improving TTFF by Two-Satellite GNSS Positioning

A way is proposed of improving the time to first fix (TTFF) in Global Navigation Satellite System (GNSS) positioning by combining pseudo-range and Doppler positioning with external altitude information. This way the position of a stationary receiver can be resolved using two satellites only. Test results obtained using authentic satellite data demonstrate that the method is sensitive to Doppler measurement errors but can improve the TTFF significantly if the sky view is constrained as, e.g., in urban canyons.

[1]  Niilo Sirola,et al.  Exhaustive global grid search in computing receiver position from modular satellite range measurements , 2006 .

[2]  Muqing Wu,et al.  The Positioning Algorithm of Two Satellites and Its Performance Analysis , 2009, 2009 International Conference on Networks Security, Wireless Communications and Trusted Computing.

[3]  Jussi Collin,et al.  Investigations of self-contained sensors for personal navigation , 2006 .

[4]  J. Mason,et al.  Algebraic two-satellite TOA/FOA position solution on an ellipsoidal Earth , 2004 .

[5]  Gerd Gendt,et al.  The International GPS Service: Celebrating the 10th anniversary and looking to the next decade , 2005 .

[6]  K. C. Ho,et al.  Geolocation of a known altitude object from TDOA and FDOA measurements , 1997, IEEE Transactions on Aerospace and Electronic Systems.

[7]  Kimmo Alanen,et al.  Pressure Altitude Enhanced AGNSS Hybrid Receiver for a Mobile Terminal , 2005 .

[8]  Florian Holzapfel,et al.  A raim approach to GNSS outlier and cycle slip detection using L1 carrier phase time-differences , 2009, 2009 IEEE Workshop on Signal Processing Systems.

[9]  B. Remondi.  Computing satellite velocity using the broadcast ephemeris , 2004 .

[10]  J. Collin,et al.  Differential barometry in personal navigation , 2008, 2008 IEEE/ION Position, Location and Navigation Symposium.

[11]  P. Chestnut.  Emitter Location Accuracy Using TDOA and Differential Doppler , 1982, IEEE Transactions on Aerospace and Electronic Systems.

[12]  Stefan Kienzle,et al.  The Effect of DEM Raster Resolution on First Order, Second Order and Compound Terrain Derivatives , 2004, Trans. GIS.

[13]  Sverre Petterssen,et al.  Introduction to Meteorology , 1941 .

[14]  Don J. Torrieri,et al.  Statistical Theory of Passive Location Systems , 1984, IEEE Transactions on Aerospace and Electronic Systems.

[15]  Louis A. Romero,et al.  TOA/FOA GEOLOCATION SOLUTIONS USING MULTIVARIATE RESULTANTS , 2005 .

[16]  Antti Lehtinen.  Doppler positioning with GPS , 2002 .

[17]  R Courant,et al.  Differential And Integral Calculus Vol-ii , 1936 .

[18]  M. Datcu,et al.  Earth observation image and DEM information aggregation for realistic 3-D visualization of natural landscapes , 2005, IEEE Transactions on Geoscience and Remote Sensing.

[19]  Louis A. Romero,et al.  Evaluation of Direct and Iterative Methods for Overdetermined Systems of TOA Geolocation Equations , 2011, IEEE Transactions on Aerospace and Electronic Systems.

[20]  P. Davidson,et al.  Improved Vehicle Positioning in Urban Environment through Integration of GPS and Low-Cost Inertial Sensors , 2009 .

[21]  C. Scott,et al.  Positioning Techniques for Fewer than Four GPS Satellites , 2009 .

[22]  S. I. Chou,et al.  Sensitivity analysis of dual-satellite geolocation , 2000, IEEE Trans. Aerosp. Electron. Syst..