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Whole cycle fuzziness initializing method in short-base line DGPS location

A technology of whole-week ambiguity and initialization, applied in satellite radio beacon positioning system, positioning, radio wave measurement system and other directions, which can solve problems such as difficulty

Inactive Publication Date: 2003-03-19
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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Problems solved by technology

However, the above-mentioned method of exchanging antennas also has its weaknesses. The main thing is that the GPS receiver must keep continuous and uninterrupted tracking and observation of GPS satellites during the operation of exchanging antennas. The point where the other antenna originally occupied was not easy, and this move required two

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Embodiment Construction

[0036] A further detailed description will be given below on specific embodiments of the present invention.

[0037] The specific implementation of the present invention is divided into two parts: the observation data collection operation and the calculation of the whole circle ambiguity estimation.

[0038] The implementation of the observation data acquisition part is divided into three operation steps:

[0039] 1. By figure 1 It can be seen that two GPS receivers 1 and 2 used for carrier phase DGPS positioning measurement are connected with respective antennas 3 and 4 through cables, and antennas 3 and 4 are placed on two points 5 and 6 respectively; 4 to 8 seconds of observation, get t 1 Carrier Phase Double-difference Observations of Two GPS Receivers at Time , the p and q in the superscript represent the GPS satellite numbers respectively, the subscripts A and B represent two observation points 5 and 6, and the distance from point 5 to point 6 is 0.7-1.5 meters;

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Abstract

The present invention relates to the whole cycle fuzziness initializing method for the carrier phase in short-base line DGPS. The present invention designs the position of mobile GPS receiving antenna and the operation steps of extracting observation data as well as corresponding data processing method. The operation of the present invention is simple and practical and the corresponding data processing method can give out accurate and reliable whole cycle fuzziness estimation of carrier phase. The present invention can raise the operation efficiency in the DGPS positioning measurement.

Description

Technical field: [0001] The invention relates to carrier phase differential positioning measurement, in particular to a method for initializing carrier phase integer ambiguity in short baseline GPS carrier phase differential positioning measurement (DGPS). Background technique: [0002] GPS is a set of satellite navigation system established by the United States. The GPS beacons provided by it have become a global resource and have played a revolutionary role in navigation, surveying and other fields. Using two GPS receivers for synchronous measurement can accurately obtain the relative coordinates between the two GPS antennas. This measurement method is called differential GPS measurement, or DGPS measurement. If one of the GPS antennas is in motion, it becomes a dynamic DGPS survey, otherwise it is called a static DGPS survey. DGPS dynamic or static positioning measurement using GPS receiver carrier phase observations can achieve very high accuracy. In short baselines (th...

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Application Information

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IPC IPC(8): G01S19/44
Inventor 袁洪宁百齐万卫星
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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