Single antenna GPS measurement of roll rate and roll angle of spinning platform
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United States of America Patent
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Aug 30, 2016
Grant Date -
Jul 4, 2013
app pub date -
Jan 3, 2012
filing date -
Jan 3, 2012
priority date (Note) -
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Abstract
System and method for determining the roll rate and roll angle of a spinning platform. The IQ amplitude and/or phase characteristics of GPS signals received at a single receiver antenna are measured using the signals output directly by a correlator that is driven at the satellite tracking frequency used for forming the navigation solution. The roll rate and roll angle are determined in real time by a Roll filter, which is preferably an Extended Kalman Filter (EKF) employing probabilistic data association, whose inputs include the measured IQ characteristics and the navigation solution. Data from non-GPS measurement sources is optionally provided to update the navigation and/or roll solution.
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