Satellite navigation system using multiple antennas
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United States of America Patent
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Apr 6, 2010
Grant Date -
Dec 15, 2005
app pub date -
Jul 27, 2005
filing date -
Apr 7, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A satellite navigation system using multiple antennas for providing the position of multiple fiduciary points on an object even when fewer than four satellites are visible to some or all the antennas. Satellite signals from the multiple antennas are fed into at least one receiver. The receiver or receivers utilize constraint information, which is independent of the satellite signals. These external constraints are used to augment the signals received from the satellites, to obtain the position solution for each antenna. In a preferred embodiment, a common reference clock is used to provide an external constraint. Examples of other external constraints that can be used in the current invention are distance between the antennas, inertial measurement of attitude, rotational or linear position sensors, etc.
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