Double differencing within GNSS constellations

作者：Li, Guangcai^*; Wu, Jiangfei; Zhao, Caixin; Tian, Yijun

来源：GPS Solutions, 2017, 21(3): 1161-1177.

DOI：10.1007/s10291-017-0599-4

• Multi-GNSS
• Mixed double difference
• Interfrequency difference
• Carrier phase linear combination

A tightly combined observational model assumes a single reference satellite for all observations from different GNSS systems. We analyze the effect of different frequencies on different-frequency inter-system mixed double differences (DFMDDs) and derive an upper limit for a permissible inter-frequency difference. To mitigate inter-frequency differences, we propose using combinations of phase observations from different GNSS systems to obtain virtual observations having the same or similar frequency. A new carrier phase linear combination method is proposed for the DFMDD, called limited lane number search method, which increases the permissible inter-frequency difference. We demonstrate the feasibility of the search method from a geometrical perspective. Finally, we provide selected combinations with desirable properties for DFMDD. Optimal and independent integer combinations are suggested for short and long baselines.

• 出版日期2017-7
• 单位中国人民解放军信息工程大学