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- 2018
基准站观测数据加密方法及其在差分GNSS后处理中的应用
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Abstract:
当基准站采样率低于流动站时，不能用常规差分全球卫星导航系统（Global Navigation Satellite System，GNSS）后处理方法得到流动站所有历元坐标。针对此问题，给出了基于精密单点定位（precise point positioning，PPP）模型构造基准站非采样点上虚拟观测值的方法。该方法将接收机钟差、对流层天顶湿延迟从观测值误差中分离出来，同消电离层模糊度一起进行估计，利用基准站真实坐标获得卫地距，在此基础上计算相邻两个观测历元的残差进而拟合历元间非采样点残差，与卫地距、各项估计误差一起生成虚拟观测值。该方法保持了虚拟观测值的误差特性，尤其是基准站与流动站间的共性误差。该方法仅加密基准站数据，对流动站没有影响。算例结果表明，基准站在采样间隔30 s范围内，使用该方法加密的虚拟观测值与真实值有较好的一致性，采样间隔分别为30 s、15 s、5 s的虚拟测码伪距和载波相位观测值偏差的标准中误差分别在0.2 m和1.2周左右、0.1 m和0.7周左右、0.05 m和0.2周左右；在30 s采样间隔情况下，按照该方法处理后仍能满足厘米级定位精度的要求
| [1] | Mader G L, Morrison M L. Using Interpolation and Extrapolation Techniques to Yield High Data Rates and Ionosphere Delay Estimates From Continuously Operating GPS Networks[C]. ION GPS, New York, 2002 |
| [2] | Song Lijie, Chai Hongzhou, Liu Xiandong, et al. Interpolation Coordinates of Roving Station Without Reference Station Data[J]. <em>Journal of Geomatics Science and Technology</em>, 2010, 27(5):316-318(宋力杰, 柴洪洲, 刘先冬, 等. 基准点无同步观测数据时流动点位置内插方法[J]. 测绘科学技术学报, 2010, 27(5):316-318) |
| [3] | LI Wei. GPS Precise Point Positioning Algorithms:Implementation and Performances[D]. Beijing:Chinese Academy of Surveying and Mapping, 2010(李玮. GPS精密单点定位算法研究与软件实现[D]. 北京:中国测绘科学研究院, 2010) |
| [4] | Hofmann-Wellenhof B, Lichtenegger H, Wasle E. GNSS-global Navigation Satellite Systems:GPS, GLONASS, Galileo, and More[M]. New York:Springer Science & Business Media, 2007 |
| [5] | Xiao Guorui, Sui Lifen, Song Qian, et al. A New Method for Processing the Rover and the Reference Stations GPS Data with Different Sampling Rates[J]. <em>Geomatics and Information Science of Wuhan University</em>, 2013, 38(10):1212-1215(肖国锐, 隋立芬, 宋倩, 等. 流动站与参考站不同采样率GPS数据处理新方法[J]. 武汉大学学报·信息科学版, 2013, 38(10):1212-1215) |
| [6] | Chang C C, Lee H Y. Performance of High Rate Interpolated Data Applied to GPS Kinematic Positioning[J]. <em>Survey Review</em>, 2011, 43(321):303-313 |
| [7] | Wang Haitao, Ou Jikun, Yuan Yunbin, et al. Strategy for Processing the Rover and the Reference Stations GPS Data with Different Sampling Rates[J]. <em>Geomatics and Information Science of Wuhan University</em>, 2010,35(2):164-167(王海涛, 欧吉坤, 袁运斌, 等.流动站与参考站不同采样率GPS数据的处理策略[J]. 武汉大学学报·信息科学版, 2010,35(2):164-167) |
| [8] | He Xiyang, Zhang Xiaohong, Li Xingxing, et al. Data Processing Strategy and Results Analysis of PPP Based Tropospheric Zenith Path Delay Estimation[J].<em>Journal of Geomatics</em>, 2010, 35(1):3-5(何锡扬, 张小红, 李星星,等. PPP估计天顶对流层延迟方法与结果分析[J]. 测绘信息与工程, 2010, 35(1):3-5) |
| [9] | Zhang Xiaohong, Chen Xinghan, Guo Fei. High-performance Atomic Clock Modeling and Its Application in Precise Point Positioning[J]. <em>Acta Geodaetica et Cartographica Sinica</em>, 2015, 44(4):392-398(张小红, 陈兴汉, 郭斐. 高性能原子钟钟差建模及其在精密单点定位中的应用[J]. 测绘学报, 2015, 44(4):392-398) |
| [10] | Huang Guanwen, Tu Rui, Zhang Qin, et al. A New Real-time Kinematic Precise Point Positioning Algorithm Based on Reference-station Corrections[J]. <em>Journal of Geodesy and Geodynamics</em>, 2010, 30(6):135-139(黄观文, 涂锐, 张勤, 等. 基于基准站改正信息的实时动态精密单点定位[J]. 大地测量与地球动力学, 2010, 30(6):135-139) |
| [11] | Leick A, Rapoport L, Tatarnikov D. GPS Satellite Surveying[M]. New York:John Wiley & Sons, 2015 |
| [12] | Schüler T. 10 Hz or 10 s?[J]. <em>GPS Solutions</em>, 2007, 11(2):77-83 |
| [13] | El-Mowafy A. Alternative Postprocessing Relative Positioning Approach Based on Precise Point Positioning[J]. <em>Journal of Surveying Engineering</em>, 2009, 135(2):56-65 |
| [14] | Yang Jian, Wang Zemin, Wang Guiwen, et al. On Clock Jumps of GPS Receiver[J]. <em>Journal of Geodesy and Geodynamics,</em> 2007, 27(3):123-127(杨剑, 王泽民, 王贵文, 等. GPS接收机钟跳的研究[J]. 大地测量与地球动力学, 2007, 27(3):123-127) |
| [15] | Kouba J. A Guide to Using International GNSS Service (IGS) Products[EB/OL]. http://acc.igs.org/UsingIGSProductsVer21.pdf,2010 |
| [16] | Kouba J, Héroux P. Precise Point Positioning Using IGS Orbit and Clock Products[J]. <em>GPS solutions</em>, 2001, 5(2):12-28 |
