Research On Detection And Repair Method Of BDS Tri - Band Carrier Data Cycle

As the GNSS (Global Navigation Satellite System) development in the direction of the multi-frequency System more, its data preprocessing have new progress.Multi-frequency signal data combination, can form more excellent properties which can be quickly fixed ambiguity, also can more accurately detecting cycle slip.In this paper, based on the multiple frequency according to portfolio theory, probes into the BDS three frequency principle and method of cycle slip detecting and repairing, presented the geometric phase combination of pseudorange phase, as well as the combination of dual-frequency combination ionosphere elimination three frequency without geometry and improved frequency detection method of the three TurboEdit method.Paper main research work is as follows:(1) Study the characteristics of the beidou three frequency combination observation, this paper proposes a detection method of optimum combination.Beidou no geometric phase combination with epoch ionospheric delay between small and is not affected by the pseudorange noise characteristics, and the big dipper pseudorange phase combination ambiguity can ensure the whole week features the whole week.Combined two geometric phase combination and a pseudorange phase combination, constitute three linearly independent of cycle slip detection and optimal selection the detection combination, which can realize real-time detection of arbitrary combination of cycle slip.(2) Combination of dual-frequency MW, the ionosphere residual combination and the ionosphere three frequency and geometric combination with sensitive to small cycle slip properties, used in combination can improve the success rate of cycle slip detection.Because of double-frequency MW combination eliminates the geometric distance and the vast majority of the ionospheric delay, ionosphere residual combination of second-order difference between epoch basic can eliminate the influence of the ionosphere, the combination of the above two methods are three frequency of cycle slip detection and can detect the beidou three frequency is not sensitive according to include all combined cycle, cycle slip.(3) In view of the traditional TurboEdit methods cannot effectively detect two frequencies at the same time within 6 weeks of small dance by week and the week of the same size, easily affected by the ionosphere residual limits.Research test an improved method of three frequency TurboEdit.Combination of without geometry without the ionosphere and the geometric phase combination of two kinds of combination, construct three linear detection inspection of quantity, through the test can detect small cycle of all within 1 week, and can effectively overcome the influence of the ionosphere.