Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1994-08-04
1995-08-15
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
455 121, H04B 7185, G01S 502
Patent
active
054423635
ABSTRACT:
The invention provides a method and apparatus for determining the precise coordinate of a remote roving on-the-fly signal receiver with respect to a reference signal receiver. The reference signal receiver is usually fixed to the Earth's surface but the instant invention's method allows for movement of the reference signal receiver without performance degradation. The reference receiver and remote roving receiver track four or more satellites so that single difference code and carrier ranges between the receivers can be formed. The method can work with just L1 signal alone, the preferred method uses at least one code range (e.g., C/A code) and two carrier ranges (e.g., L1 and L2) with full wavelength L2--squared implementation addition code ranges if available for use. This method allows for initialization of carrier integer ambiguities whether reference or remote receiver are fixed or moving relative to each other and a robust procedure for determining integer ambiguities.
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patent: 5177489 (1993-01-01), Hatch
patent: 5296861 (1994-03-01), Knight
patent: 5359332 (1994-10-01), Allison et al.
Remondi, B., "Kinematic GPS Results W/O Static Initialization" NOAA Tech, mo.NOS NGS-55, May 1991, pp. 1-25.
Remondi, B., "On-the-Fly Kinematic GPS Results Using Full-Wavelength Dual-Frequency Carrier Ranges", 49th Meeting of Inst. of Nav. Jun. 1993.
Remondi, B., "Real-Time CM-Accuracy GPS:Initialization While in Motion (Warm Start Vs. Cold Start)", Navigation, vol. 40, No. 2, Summer 93, pp. 199-207.
Blum Theodore M.
Marsh Luther A.
U.S. Army Corps of Engineers as represented by the Secretary of
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