Combined navigation algorithm by means of magnetometers and GPS

Details Combined navigation algorithm by means of magnetometers and GPS Combined navigation algorithm by means of magnetometers and GPS

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006acasn..47...93z&link_type=abstract

Acta Astronomica Sinica, vol. 47, no. 1, p. 93-99

Astronomy and Astrophysics

Astronomy

Geomagnetic Navigation, Extended Kalman Filtering, Artificial Satellites, Gps

Scientific paper

In order to refine the geomagnetic model of LEO (Low Earth Orbit) and to improve the precision of navigation, it introduces GPS as a new measure instrument and proposes a combined navigation algorithm based on three-axis magnetometer and GPS. Using the position and velocity of the satellite as state vectors and using the intensity of the magnetic field and signals of GPS as observed values, this algorithm establishes the state equation and observation equation respectively. The orbit states which are determined by GPS navigation system are used to estimate corrections of geomagnetic model. The simulation result shows that the estimation error of orbit position is less then 20 meters and velocity estimation error is less than 1 meter per second. The veracity and convergence of this navigation algorithm are better than mono-geomagnetic navigation system.

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