Research On High-precision Deformation Monitoring Technology Based On The BDS/GPS Integrated

At present, the GPS technology is applied to deformation monitoring, not only expands the development space of deformation monitoring technology, but also has great advantages of data’s all-weather、continuity and instantaneity, Besides, it can keep the high-precision of data tracking in the monitoring process, and realizes high-level’s automatic monitoring. However, with the more and more extensive application of GPS technology in deformation monitoring, many technical problems occurs. For example, situation happens such as low positioning accuracy and reliability of location and even failure of monitoring when engineering monitoring is applied in the valley and the forest and where buildings keep out the monitoring or the multipath effect has great influence on the monitoring. For that reason, the paper put up the idea of combination of BDS and GPS in positioning and discuss the deformation monitoring technology of the combination of the BDS and GPS.The content of the paper are as follows:1) It compares time system and the coordinate system between the BDS and GPS, discusses conversion relationship of the two kinds of space and time coordinate system. System analysis and discuss the satellite coordinates calculation method of BDS and GPS and also the error should be considered when use BDS/GPS integration to relative positioning and the correction method of every kind of error in the paper;2) System discusses the BDS/GPS deformation monitoring of operation mode, technology design and its data processing method, and illustrates the effect of the BDS/GPS integrated positioning applied to deformation monitoring through examples;3) It deduces the function model and stochastic model of the BDS/GPS relative positioning in detail, and the paper introduces the methods of cycle slip detection and repair and double difference ambiguity calculating;4) It writes out the BDS/GPS integrated data processing software, and by analysis of processing results collected from two different kinds of abservation conditions, concludes that the integration positioning of BDS and GPS can effectively increase the accuracy of the positioning and the stablity of the system.