【作者】 王有为； 赵琳； 杨福鑫； 张洁；

【Author】 Youwei Wang;Lin Zhao;Fuxin Yang;Jie Zhang;College of Intelligent Systems Science and Engineering, Harbin Engineering University;

【机构】 哈尔滨工程大学智能科学与工程学院；

【摘要】 周跳探测与修复可以使整数跳变后的整周模糊度参数快速达到期望的精度水平,实现连续高精度定位的目的。但是现阶段周跳固定采用的多为全部模糊度子集周跳固定方法,理论上正确固定模糊度子集的数量越多,参数解的精度和可靠性越高,但是待固定子集数量越多,全部固定成功率越低。所以本文针对目前基于采用全部模糊度集合的多频非组合周跳固定成功率受部分低观测量质量卫星信号的影响,分别研究分析了依据卫星高度角,信噪比和模糊度ADOP值的三种筛选方法,结合Bootstraping成功率筛选和比率测试进行检验。最后,通过哈尔滨工程大学测站接收的北斗多频观测数据和MGEX的精密轨道和钟差产品,在完成基于历元间差分模型解算浮点解和相应协方差矩阵的基础上,分别依据三种最优子集筛选方法,实现部分子集周跳的可靠性固定。试验结果表明,相对于在全子集周跳固定方法无法完全固定的情况下,采用部分子集周跳固定方法可以达到100%固定成功率。更多还原

【Abstract】 Cycle slip detection and repair can make the integer ambiguity parameter with integer jump quickly reach the desired accuracy level, and achieve the performance of continuous high-precision positioning. However, the current cycle slip fixing is mostly the cycle slip fixing method with full ambiguity subsets. In theory, the more the number of correctly fixed ambiguity subsets, the higher the accuracy and reliability of the parameter solution, but the more the number of fixed subsets, the lower the success rate of all fixation. Therefore, in view of the current multi-frequency uncombined cycle slip fixing success rate based on the use of full ambiguity subsets, which is affected by some low-quality satellite signals, this paper analyzes the three factors based on satellite altitude, signal-to-noise ratio and ambiguity ADOP values. Combined with Bootstraping’s success rate selection and ratio test for verification. Finally, the BeiD ou multi-frequency observation data received by the Harbin Engineering University station and MGEX’s precision orbit and clock error products are used to solve the floating point solution and the corresponding covariance matrix based on the epoch difference model. Respectively according to the three optimal subset selection methods, the reliability of partial subset cycle slips is fixed. The test results show that, compared to the case where the full subset cycle slip fixation method cannot be completely fixed, the partial subset cycle slip fixation method can achieve 100% fixation success rate.更多还原