High-rate Doppler-aided cycle slip detection and repair method for low-cost single-frequency receivers

• Published in: GPS Solutions
• Main Authors: Zhao, Jiaojiao, Hernández Pajares, Manuel, Li, Zishen, Wang, Liang, Yuan, Hong
• Other Authors: Universitat Politècnica de Catalunya. Departament de Matemàtiques, Universitat Politècnica de Catalunya. IonSAT - Grup de determinació Ionosfèrica i navegació per SAtèl·lit i sistemes Terrestres
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2020
• Subjects: Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències; Geophysics; Cycle slip detection and repair; Low-cost single-frequency GNSS receiver; High-rate GNSS data; Doppleraided; Geofísica; Classificació AMS::86 Geophysics; Iceland
• Online Access: http://hdl.handle.net/2117/386232; https://doi.org/10.1007/s10291-020-00993-0

The version of record is available online at: http://dx.doi.org/10.1007/s10291-020-00993-0 Carrier phase cycle slips can be an important source of error in precise Global Navigation Satellite System (GNSS) positioning. In such cases, cycle slips can seriously compromise the positioning accuracy and reliability, especially for singlefrequency receivers, which do not provide simultaneous measurements at diferent frequencies to generate efective linear combinations for cycle slip detection. We introduce a high-rate Doppler-aided cycle slips detection and repair (DACS-DR) method to detect and repair cycle slips in single-frequency low-cost GNSS receivers, which beneft from the availability of high-rate Doppler measurements. The distributions of the residuals of the time-diferenced carrier phase minus the carrier phase change derived from Doppler observations are analyzed systematically under diferent sampling rates. A comparison is further performed between the low-cost and high-end receivers. Considering that the loss of lock indicator (LLI) output by receivers can also refect the condition of cycle slips, the reliability of the LLI is also discussed based on our experimental receiver. Based on these analyses, the DACS-DR method is used in a foat-PPP experiment with a data set collected under a difcult situation: a high-latitude urban canyon (Akureyry, northern Iceland, Dec. 2017) with intense ionospheric scintillation. The results demonstrate that the convergence time, positioning errors, and the number of re-convergence events are all signifcantly reduced with the proposed method. Furthermore, the RMS values of the positioning errors in the horizontal and vertical directions are improved by 44.2% and 21.2%, respectively. Peer Reviewed Postprint (published version)