[1] Pan Shuguo, Wang Qing, Ke Fuyang, Deng Jian, et al. Method for integer ambiguity resolution in GPS network RTK [J]. Journal of Southeast University (English Edition), 2009, 25 (4): 491-495. [doi:10.3969/j.issn.1003-7985.2009.04.016]

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Method for integer ambiguity resolution in GPS network RTK()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 4

Page:

491-495

Research Field:

Surveying and Mapping and Navigation

Publishing date:

2009-12-30

Info

Title:

Method for integer ambiguity resolution in GPS network RTK

Author(s):

Pan Shuguo;  Wang Qing;  Ke Fuyang;  Deng Jian

School of Instrument of Science and Engineering, Southeast University, Nanjing 210096, China

Keywords:

network real time kinematic;  ambiguity;  troposphere;  reference satellite;  least-squares ambiguity decorrelation adjustment

PACS:

P225

DOI:

10.3969/j.issn.1003-7985.2009.04.016

Abstract:

A method for integer ambiguity resolution in the global positioning system(GPS)multi-reference station network real time kinematic(RTK)is proposed. First, the barycenter of the triangle of reference stations for ambiguity resolution is taken as a reference point. The satellite which has the largest elevation angle with the reference point is selected as a reference satellite. The parameters for constructing the weight matrix of carrier phase observation and the criteria for checking the correctness of integer ambiguity resolution of a network are obtained. Then, the wide ambiguity is calculated by a linear combination method of dual-band observation. And the L1 ambiguity is obtained by a non-ionosphere combination method. The Kalman filter is introduced to refine the floating-point solution of ambiguity and estimate the real-time tropospheric delay. Finally, the cofactor matrix of ambiguity is de-correlated by Z-transformation to reduce the searching space of the integer ambiguity solution and improve the efficiency of the least-squares ambiguity decorrelation adjustment(LAMBDA)algorithm. The experimental results show that this method can reliably obtain the integer ambiguity solution among multi-reference stations with 40 epochs.

References:

[1] Sun H, Cannon M E, Melgard T E. Real-time GPS reference network carrier phase ambiguity resolution [C]//Institute of Navigation National Technical Meeting. San Diego, CA, USA, 1999: 25-27.
[2] Tang Weiming, Liu Jingnan, Shi Chuang, et al. Three steps method to determine double difference ambiguities resolution of network RTK reference station[J]. Geomatics and Information Science of Wuhan University, 2007, 32(4): 305-308.(in Chinese)
[3] Huang Dingfa, Xiong Yongliang, Yuan Linguo. Global positioning system (GPS)—theory and practice[M]. Chengdu: Southwest Jiaotong University Press, 2006: 207-208.(in Chinese)
[4] Grgich P M, Kealy A, Gordini C, et al. Atmospheric bias interpolation for network RTK GPS[C]//International Global Navigation Satellite Systems Society IGNSS Symposium. Queensland, Australia, 2006: 17-21.
[5] Sakidin H, Rizam M, Bakar A, et al. Effect of GPS tropospheric delay Neill mapping function simplification [J]. Malaysian Journal of Mathematical Sciences, 2009, 3(1): 95-107.
[6] Zhou Letao, Huang Dingfa, Yuan Linguo, et al. A Kalman filtering algorithm for online integer ambiguity resolution in reference station network[J]. Acta Geodaetica et Cartographica Sinica, 2007, 36(1): 37-41.
[7] Hamzah S, Mohd R A B, Abdul R M S, et al. Effect of GPS tropospheric delay Neill mapping function simplification[J]. Malaysian Journal of Mathematical Sciences, 2009, 3(1): 95-107.
[8] Vollath U. The factorized multi-carrier ambiguity resolution(FAMCAR)approach for efficient carrier-phase ambiguity estimation [C]//The 17th International Technical Meeting of the Satellite Division of the Institute of Navigation. Long Beach, CA, USA, 2004: 21-24.
[9] Brown N, Keenan R, Richter B, et al. Advances in ambiguity resolution for RTK applications using the new RTCM V3.0 master auxiliary messages [C]//The 18th International Technical Meeting of the Satellite Division of the Institute of Navigation. Long Beach, CA, USA, 2005: 73-80.
[10] Liu Jiyu, Li Zhenghang, Wang Yuehu. Principle and application of global position system[M]. Beijing: SinoMaps Press, 1993.(in Chinese)
[11] Xu P, Cannon E, Lachapelle G. Mixed integer observation models, GPS decorrelation and integer programming[J]. Technical Reports Department of Geodesy and Geoinformatics, 2000, 106(2): 1-26.

Memo

Memo:

Biography: Pan Shuguo(1975—), male, doctor, associate researcher, psg@seu.edu.cn.
Foundation item: The National Key Technology R& D Program of China during the 11th Five-Year Plan Period(No.2008BAJ11B05).
Citation: Pan Shuguo, Wang Qing, Ke Fuyang, et al. Method for integer ambiguity resolution in GPS network RTK[J]. Journal of Southeast University(English Edition), 2009, 25(4): 491-495.

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