GNSS Triple-frequency Data Ambiguity Resolution Method Research

With the development of second-generation satellite navigation system,the future navigation satellite constellation will provide multiple radio signal frequency.These multi-frequency signal can be obtained by combining many features excellent combination of data,which makes the traditional dual-frequency navigation mode has undergone tremendous changes.In this paper,the method of determining GNSS triple-frequency data ambiguity is studied,the main results of the research include:1)Based on a combination of triple-frequency GNSS observations on the analysis,selected a combination of relatively good performance combination coefficients,and got three special kinds of non-geometric and non-ionosphere.For the GPS system,GFSO(5,-39,34),IFSO(77,-468,391)and GFIF(18095,-125892,107134);For the Beidou system,GFSO(30,-173,143),IFSO(2289,-10726,8437)and GFIF(83930,-439766,353587),these special combinations can be used to solve ambiguity under long baseline Operator.2)Use beidou triple-frequency measured data on CIR method,the improved CIR algorithm and without geometric ionospheric model calculating ambiguity method is validated,summed up the advantages and disadvantages of each method and gives no long baseline triple-frequency analysis by example No programs geometric alleys ambiguity calculation more simple valuation formula ionosphere ambiguity resolution.The results showed that:In short baseline,triple-frequency CIR method of solving real-time ambiguity,relative positioning.In the long baseline,use no ionosphere-free combination regimen geometry makes solving wide lane,wide lane,narrow lane ambiguity in the process that affects only the measurement noise by enabling smooth multi-epoch ambiguity single epoch the estimation error converges to 0.5 weeks.