Patent ID: 8963764
Filing Date: 2015-02-24
Classification: G01S

Abstract:
1. A method for determining at least one of heading and pitch of a movable platform, said method comprising the steps of: operating a radar system in communication with a computer, and having receivers mounted at forward and aft positions on said moveable platform, and having a transmitter mounted on at least one of said forward and aft positions on said movable platform, where said forward and aft positions define a baseline, to measure the ranges of at least two satellites, operating said radar system comprising: obtaining from a memory coupled to said computer, pre-stored ephemerides for said satellites; and using said computer and said satellite ephemerides, setting up delta-range equations in said computer expressing a baseline vector in terms of range measurements from said forward and aft positions and said at least two satellites, and determining a least squares solution for the at least one of heading and pitch using the delta-range equations and the range measurements from said forward and aft locations, wherein said solution for at least one of heading and pitch is determined independently of any off-platform sensors or transmissions.