Real-time cycle slip detection and repair of GNSS triple-frequency observations with wavelet transform united code-phase combinations

doi:10.13474/j.cnki.11-2246.2020.0095

Abstract

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.

Key words: triple-frequency, un-differenced observation, BDS, GPS/QZSS, cycle slips detection and repair, wavelet transform, QR factorization

CLC Number:

P228

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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