Method and Apparatus for Reconstructing Time of Transmit from Assisted or Weak Signal GPS Type Observations
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United States of America Patent
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app pub date -
Jun 27, 2007
filing date -
Jul 29, 2005
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Abandoned
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Abstract
The invention provides a GPS device that resolves timing errors as applicable to an AGPS navigation solution. A single state algorithm provides rapid convergence, typical with standard Newton-Raphson performance. Problems due to ill-conditioning of the input matrix are identified by an augmented DOP calculation procedure, which may be used to identify unreliable results or to estimate the errors for those results.
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