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Method for improving resolving success rate of medium and long baseline GPS integral cycle fuzziness

It is a technique of whole cycle ambiguity and medium and long base, which is applied in the direction of radio wave measurement system, satellite radio beacon positioning system, measurement device, etc. It can solve the problems of rejection, small Ratio value, and low accuracy of ambiguity real number solution, and achieves Improve the success rate, increase efficiency, improve the effect of success rate and reliability

Active Publication Date: 2016-08-10
10TH RES INST OF CETC
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Problems solved by technology

When using the LAMBDA algorithm to solve the medium and long baseline ambiguity, due to the influence of the ionosphere and troposphere, the accuracy of the ambiguity real number solution is low. Even if the ambiguity is fixed and correct, the Ratio value will be very small. Often rejects the correct ambiguity value

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  • Method for improving resolving success rate of medium and long baseline GPS integral cycle fuzziness
  • Method for improving resolving success rate of medium and long baseline GPS integral cycle fuzziness
  • Method for improving resolving success rate of medium and long baseline GPS integral cycle fuzziness

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Embodiment Construction

[0021] refer to figure 1 . According to the present invention, at first, use the monitoring and measuring software to extract useful observation data from the measurement data RINEX format files of the GPS receivers of the main and auxiliary stations through the preprocessing means such as the set height cut-off angle and carrier phase cycle slip detection ;Secondly, compare the observation data of the main and auxiliary stations to select the appropriate satellite as the reference star, establish the double-difference observation equation according to the observation value, use the Kalman filter to update the state of the observation equation and estimate the parameters, and solve the ambiguity floating point. Point solution; then, after transforming the floating-point solutions of the GPS carrier L1 and L2 integer ambiguities, the wide-lane ambiguity and the L1 ambiguity vector group are formed, and the integer solution of the wide-lane ambiguity is obtained by using the LAM...

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Abstract

The invention provides a method for improving resolving success rate of medium and long baseline GPS integral cycle fuzziness, and aims to provide a method with advantages of high fuzziness real solution precision and high success rate. The method is realized through a technical solution which is characterized in that the method comprises the steps of setting an elevation mask angle by means of monitoring and measuring software, acquiring rough coordinates of a main measurement station and an auxiliary measurement station, and extracting useful observation data; selecting a reference satellite, comparing observation data of the main measurement state with the observation data of the auxiliary measurement station, establishing a double-difference observation equation by means of the observation data of the main measurement station and the auxiliary measurement station, performing state updating and parameter estimation on an observed equation by means of a Kalman filter, and solving a fuzziness float solution; then, converting the fuzziness float solutions of GPS double-difference carrier L1 and L2, and forming a vector set which comprises a wide lane integral cycle fuzziness and a carrier L1 fuzziness; searching the wide lane integral cycle fuzziness by means of a LAMBDA algorithm, obtaining the integer solution of the wide lane integral cycle fuzziness after fixation, and finally determining the success rate of the resolved fuzziness through a preset threshold, and confirming a correctly resolved integral cycle fuzziness.

Description

technical field [0001] The invention relates to a navigation that can be applied to various moving carrier equipment such as vehicles, ships, and airplanes, and can also be used in technical fields such as long-distance geodetic surveying, precise positioning, marine surveying and mapping, aviation formation flight, and attitude measurement. It is a method to improve the success rate of solving the ambiguity of the middle and long baselines ≥ 10Km, and the whole circumference of GPS. Background technique [0002] With the continuous development of GPS measurement technology, GPS measurement technology has been widely used in all walks of life. However, since the GPS measurement is to determine the three-dimensional coordinates of the ground point by receiving the information transmitted by the satellite on the ground, along with the existence of various errors affecting the GPS measurement, it brings certain difficulties to the GPS data processing, especially the solution of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 刘明凯王志丘
Owner 10TH RES INST OF CETC
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