System and method for model-base compression of GPS ephemeris
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United States of America Patent
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Mar 16, 2010
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app pub date -
Feb 21, 2007
filing date -
Feb 21, 2006
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Abstract
A method for propagating ephemeris data for a satellite in Earth orbit is provided. The method includes the steps of receiving orbital positional data for a first time period of a satellite's Earth orbit, propagating orbital positional data for the satellite's Earth orbit during a second time period extending beyond the first time period, fitting a Keplerian ephemeris model to the propagated orbital positional data to estimate model coefficients, and sending the estimated model coefficients to receivers for determination of receiver position at a time during the second time period.
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