Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2006-10-03
2006-10-03
Chung, Phung My (Department: 2138)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C342S357490, C342S357490, C701S214000
Reexamination Certificate
active
07117417
ABSTRACT:
A method for generating satellite clock corrections for a WADGPS network computers satellite clock corrections after removing other substantial error components. Errors caused by the ionosphere refraction effects are removed from GPS measurements taken at reference stations using dual-frequency GPS measurements. The multipath noise are removed by smoothing of GPS pseudorange code measurements with carrier-phase measurements. The tropospheric refraction effect can be largely removed by modeling, and if desired, can be improved by the use of small stochastic adjustments included in the computation of the clock correction. After removing the above error factors, satellite clock corrections are computed for individual reference stations, and an average clock correction is formed for each of a plurality of satellites by taking an average or weighted average of the satellite clock corrections over reference stations to which the satellite is visible.
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Hatch Ronald R.
Nelson Frederick W.
Sharpe Richard T.
Chung Phung My
Morgan & Lewis & Bockius, LLP
Navcom Technology Inc.
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