Theory and Experiment Analysis on the Influence of Floods on a GNSS Pseudo-Range Multipath and CNR Signal Based on Two Cases Study in China

• DOI: 10.3390/rs14225874
• Publication Date: 2022-11-21T09:33:32Z
• Authors: Mingkun Su; Xin Chang; Fu Zheng; Junna Shang; Lei Qiao; Xuyang Teng; Minhong Sun
• Keywords: GLONASS; Carrier-to-noise ratio; Multipath mitigation

The surrounding environment of a GNSS observation station is changed during flood, and this results in more serious multipath than normal environment. Considering that the error largely related to pseudo-range CNR (Carrier-to-noise ratio) signal, influence floods on analyzed theory through experiment. To ensure accuracy analysis results, ground track repeat period GPS, GLONASS, BDS satellites investigated from perspective skyplots. Two real cases study collected Zhengzhou Xinxiang, China, 2021, are used demonstrate detail. Experimental show GPS satellite performs seriously flood. maximum RMS increase rate approximately 17.85%, average all other with whole arc 6.55%. In addition, three systems decrease For GLONASS satellites, at high elevation angle low angle. 5 dB-Hz for 7 satellite. terms system, orbital type decreases 2 MEO GEO about 1 IGSO