Method for using three GPS frequencies to resolve...

Details Method for using three GPS frequencies to resolve... Method for using three GPS frequencies to resolve...

2006-09-22

2009-12-15

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

Reexamination Certificate

active

07633437

ABSTRACT:
A new three-frequency technique for obtaining geometry free, refraction-corrected, ambiguity-resolved, carrier-phase measurements has been described. First, the ambiguities on at least two wide-lane carrier-phase measurement differences are obtained by averaging the corresponding frequency weighted code measurements. These two ambiguity-resolved measurements are then combined into a composite refraction-corrected measurement. The resulting composite measurement is quite noisy due to the amplification of the multipath noise in the original carrier-phase measurements. But this noisy refraction-corrected carrier-phase measurement can be smoothed with another minimum-noise, refraction-corrected carrier-phase composite measurement. The minimum-noise, refraction-corrected composite measurement is constructed from the primary carrier-phase measurements prior to resolving their whole-cycle ambiguities. By smoothing the difference in the two refraction-corrected measurements, the noise can be reduced and the bias in the low-noise measurement (due to incorrect ambiguities) can be estimated and subsequently corrected.

REFERENCES:
patent: 5148179 (1992-09-01), Allison
patent: 5359332 (1994-10-01), Allison et al.
patent: 5903654 (1999-05-01), Milton et al.
patent: 6934632 (2005-08-01), Hatch
patent: 7117417 (2006-10-01), Sharpe et al.
patent: 7432853 (2008-10-01), Vollath
patent: 2006/0164297 (2006-07-01), Hernandez-Pajares et al.
patent: 2005/036202 (2005-04-01), None
Simsky, A., “Three's the Charm: Triple Frequency Combinations in Future GNSS,” Inside GNSS Magazine, Jul./Aug. 2006, pp. 38-41.
Bonillo-Martinez, C., et al., “The Benefits of the GPS Three Frequencies on the Ambiguity Resolution Techniques,” ION GPS '99, Nashville, TN, Sep. 14-17, 1999, pp. 1737-1746.
Colombo, O., et al., “Resolving Carrier-Phase Ambiguities on the Fly, At More Than 100 km From Nearest Reference Site, With the Help of Ionospheric Tomography,” ION GPS '99, Nashville, TN, Sep. 14-17, 1999, pp. 1635-1642.
Colombo, O., et al., “Ionospheric Tomography Helps Resolve GPS Ambiguities on the Fly at Distances of Hundreds of Kilometers During Increased Geomagnetic Activity,” Presented at the IEEE “Plans 2000” Meeting, San Diego, Mar. 13-16, 2000.
Ericson, S., “A Study of Linear Phase Combinations in Considering Future Civil GPS Frequencies,” ION NTM, 1999, pp. 677-686.
Feng, Y., et al., “A Long Range Dynamic GPS Positioning System and its Test Results,” Position Location and Navigation Symposium 1996, IEEE, Atlanta, GA, Apr. 1996, pp. 711-717.
Forsell, B., et al., “Carrier Phase Ambiguity Resolution in GNSS-2,” ION GPS, 1997, pp. 1727-1736.
Han, S., et al., “The Impact of Two Additional Civilian GPS Frequencies on Ambiguity Resolution Strategies,” ION 55thAnnual Meeting, Cambridge, MA, Jun. 28-30, 1999, pp. 315-321.
Hatch, R., “The Promise of a Third Frquency,” GPS World, May 1996, pp. 55-58.
Hatch, R., et al., “Civilian GPS: The Benefits of Three Frequencies,” GPS Solutions, vol. 3, No. 4, 2000, pp. 1-9.
Hernandez -Pajares, M., et al., “Impact of Real-Time Ionospheric Determination on Improving Precise Navigation with Galileo and Next-Generation GPS,” ION GPS 2002, Portland, OR, Sep. 24-27, 2002, pp. 2756-2767.
Isshiki, H., “An Application of Wide-Lane to Long Baseline GPS Measurements (3),” ION GPS, 2003.
Jung, J., “Optimization of Cascade Integer Resolution with Three Civil GPS Frequencies”; ION GPS 2000, Salt Lake City, UT, Sep. 19-22, 2000, pp. 2191-2200.
Raquet, J., et al., “Long Distance Kinematic Carrier-Phase Ambiguity Resolution Using a Simulated Reference Receiver Network,” ION GPS-97, Kansas City, Missouri, Sep. 1997, pp. 1-10.
Sinko, J., “A Compact Earth Tides Algorithm for WADGPS,” ION GPS -1995, pp. 35-44.
Teunissen, P., et al., “A Comparison of TCAR, CIR and LAMBDA GNSS Ambiguity Resolution,” ION GPS 2002, Portland, OR, Sep. 24-27, 2002, pp. 2799-2808.
Vollath, U., et al., “Analysis of Three-Carrier Ambiguity Resolution (TCAR) Technique for Precise Relative Positioning in GNSS-2,” ION GPS, 1998, pp. 417-426.
Werner, W., et al., “Performance of the TCAR Method in Multipath and Jamming Environments,” ION GPS, 1998, pp. 1385-1394.

Affiliated with

Also associated with

Rating

Method for using three GPS frequencies to resolve... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for using three GPS frequencies to resolve..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for using three GPS frequencies to resolve... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4063167