Title :
Position fix from three GPS satellites and altitude: a direct method
Author :
Phatak, M. ; Kohli, Shruti
Author_Institution :
Aerosp. Syst. Pvt. Ltd., Bangalore
fDate :
1/1/1999 12:00:00 AM
Abstract :
A method to find a direct solution to GPS equations given four pseudo-range measurements and satellite positions is given by L.O. Krause [1987]. This method is modified here to find a direct solution given three pseudo-ranges and satellite positions and altitude above the reference ellipsoid
Keywords :
Global Positioning System; Kalman filters; elliptic equations; GPS equations; GPS satellites; Kalman filter initialization; altitude constraint; direct method; modified Krause method; navigation fix; position fix; pseudo-range measurements; reference ellipsoid; satellite altitude; satellite positions; Clocks; Difference equations; Differential algebraic equations; Earth; Ellipsoids; Global Positioning System; Navigation; Position measurement; Satellite ground stations; Shape measurement;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
