Separated GPS sensor and processing system for remote GPS sensing and centralized ground station processing for remote mobile position and velocity determinations
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United States of America Patent
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May 30, 1995
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N/A
app pub date -
Apr 5, 1993
filing date -
Apr 5, 1993
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Abstract
A rawinsonde system embodiment of the present invention includes a digital GPS snapshot buffer and a serial communications controller for transmitting message frames formed of a combination of digital GPS data from the snapshot buffer and digitized hardwired meteorological data input from a humidity-temperature-pressure instrument. The message frames are telemetered at a relatively low rate over a meteorological radio band to a ground station. Substantially all of the conventional GPS digital signal processing is performed by the ground station, including carrier recovery, PRN code locking, pseudo-range extraction, ephemeris data extraction, almanac collection, satellite selection, navigation solution calculation and differential corrections. Ground processing further includes Kalman filter wind velocity calculation.
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