[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(
)
一种GPS网络RTK整周模糊度解算方法
)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
- 一种GPS网络RTK整周模糊度解算方法
- 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
- 网络实时动态(RTK); 模糊度; 对流层; 参考站; 最小二乘模糊度降相关方法
- 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.
- 提出了一种适用于GPS多参考站网络的RTK模糊度固定方法. 首先, 以参与模糊度解算的参考站三角形重心为参考点, 将与其形成高度角最大的卫星选作参考卫星, 进而提供了载波观测值权阵构造的参数以及模糊度网解正确性的检验条件. 然后, 通过双频线性观测数据组合计算双差宽巷模糊度, 并利用无电离层观测数据组合计算L1模糊度浮点解, 引入卡尔曼滤波进行精化, 并实时估计对流层延迟参数. 最后, 通过Z变换对模糊度协因素阵进行去相关, 从而减小模糊度整数解的搜索空间, 提高LABMDA算法固定模糊度的效率. 实验结果表明, 该方法能在40个历元内可靠实现多个参考站间整周模糊度解算.
References:
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[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.
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[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)
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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.