Vehicle Orientation by Satellite
Kurt Walker and Curt Johnson
Advisor: Dr. Jim Sennott
The Global Positioning System (GPS) uses time-of-flight and carrier
phase measurements from satellites to determine the position of a point.
However, in such areas as aviation and earth moving, a vehicle's orientation
is also required. Orientation of a vehicle in pitch and yaw were of interest
in this project. These can be determined by measuring the offset vector
between two antennas in a local-level coordinate system. Algorithms were
developed for processing the data from two receivers, updating antenna
vector components, and converting these to yaw and pitch angles. Carrier
phase angle data was differenced between satellites so that large geometric
and other errors common to both antennas reduced to the centimeter level.
Simulation was performed in MATLAB and algorithms were later implemented
using C code.
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