| 小波变换联合伪距相位组合探测与修复GNSS三频周跳 |
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| 引用本文： | 孟令东,陈俊平,王解先.小波变换联合伪距相位组合探测与修复GNSS三频周跳[J].测绘通报,2020,0(3):140-144. |
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| 作者姓名： | 孟令东 陈俊平 王解先 |
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| 作者单位： | 1. 同济大学测绘与地理信息学院, 上海 200092;2. 中国科学院上海天文台, 上海 200030;3. 中国科学院大学天文与空间科学学院, 北京 100049 |
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| 基金项目： | 国家自然科学基金（11673050）；国家重点研发计划（2018YFB0504300） |
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| 摘 要： | 三频观测值可改善周跳探测与修复，但易受伪距观测值噪声的严重影响且有一些不敏感周跳组合无法探测。针对目前存在的问题，本文采用小波变换理论对伪距观测值降噪以提高探测修复周跳能力；合理优化组合观测量以组成稳定方程；使用QR分解进一步提高计算跳变量时的数值稳定性。最后，利用BDS和GPS/QZSS三频高、低采样率实测数据进行测试。结果表明，所有人为加入的周跳都被正确探测并修复，而且不存在无法探测、周跳误探与误修复问题。
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| 关 键 词： | 三频 非差数据 BDS GPS/QZSS 周跳探测与修复 小波变换 QR分解 |
| 收稿时间： | 2019-05-27 |
| 修稿时间： | 2019-10-28 |
Real-time cycle slip detection and repair of GNSS triple-frequency observations with wavelet transform united code-phase combinations |
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| MENG Lingdong,CHEN Junping,WANG Jiexian.Real-time cycle slip detection and repair of GNSS triple-frequency observations with wavelet transform united code-phase combinations[J].Bulletin of Surveying and Mapping,2020,0(3):140-144. |
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| Authors: | MENG Lingdong CHEN Junping WANG Jiexian |
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| Institution: | 1. College of Surveying and Geo-Infomatics, Tongji University, Shanghai 200092, China;2. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;3. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Triple-frequency signals in theory can improve cycle slip detection and repair. While, the performance of cycle slip detection and repair is largely effected by the noise of pseudorange and some special cycle slip combination cannot be detected. Aiming at current problem, using wavelet transform theory to denoise pesudorange, the success rate of cycle slip correctly repaired could be improved. Reasonable strategy QR factorization has been used to get better numerical stability; More stable equations could be formed after optimize combination observations. GPS/QZSS and BDS triple-frequency data with higher and lower sampling rate have been used to validate this algorithm. We conclude that all cycle slip manually added could be detected and repaired correctly without insensitive cycle slip combinations. |
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| Keywords: | triple-frequency un-differenced observation BDS GPS/QZSS cycle slips detection and repair wavelet transform QR factorization |
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