Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2005-01-18
2005-01-18
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C701S215000
Reexamination Certificate
active
06844847
ABSTRACT:
Measurement of orientation of a mobile in space, for example the heading of a ship with the aid of receivers of satellite-based radio positioning signals. To obtain a measurement of orientation very rapidly, use is made of two reception antennas located at two points A and B whose distance D is known. First, n successive calculations of position of the point A with respect to the point B (for example a dozen successive calculations if the distance D is 40 centimeters) are performed based on a single set of 2p pseudo-distances measured between each antenna and p satellites. The n calculations correspond to n initial estimated positions serving as starting assumptions for the calculation. The n estimated positions are situated on a circle with center B and radius D. The calculated positions are situated at distances from the point B. A position is selected representing a true position of the point A while verifying that this position is on the circle with center B and radius D to within a few millimeters. The selection may possibly be improved by verifying the consistency of the measurement.
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patent: 5933110 (1999-08-01), Tang et al.
patent: 6259398 (2001-07-01), Riley
JC Juang et al.: “Development of GPS-based attitude determination algorithms” IEEE Transactions on Aerospace and Electronic Systems, vol. 33, No. 3, pp. 968-976 7/97.
RA Brown et al.: “Instantaneous GPS attitude determination” Proceedings of the Position Location and Navigation Symposium, vol. -, pp. 113-120 1992.
Issing Gregory C.
Mull F H
Thales
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