Study On Influence Of PCV Correction To Beidou High Precision Baseline

Satellite navigation systems are developing rapidly in the civilian and military fields. In different areas of science and technology it has played a vital role, especially the development of China’s Beidou navigation. Its performance is gradually catching up the other three navigation systems, and even beyond.High-precision baseline solution for geodynamics, marine geodesy, exploration, aviation and satellite remote sensing precision engineering measurements, deformation monitoring, measurement, and many other areas of the city control has important significance. In order to get a more accurate baseline solution, error source analysis is essential for navigation and positioning system, wherein the antenna phase center variation (PCV) as an important baseline solution will often cause even decimeter centimeter-level errors.According to the requirement of Nature Science Eoundation of China "Multiple antenna-precision Compass/GPS positioning model and key technology research" and Shanghai Science and Technology Commission of Science and Technology Innovation Action Plan Project "GPS/Compass clock synchronization application development and demonstration of a multi-antenna receiver unit", the main research of this paper are listed as follows.Firstly, studying the clock synchronous dual-antenna concept, and establish a new baseline solution using Beidou single difference model based on this theory. Using generalized constraint theorem to fix carrier phase integer ambiguities, using MHM multipath model for analysis, and then calculate the value of the baseline solution with Kalman filter algorithm. Enhancing the convergence rate of the baseline solution also found that baseline solution accuracy is still a margin of error, which leads to the concept of baseline solution PCV influence.Subsequent studying several PCV measurement methods, and according to synchronized dual antenna theory established a new absolute PCV field measurement method. The difference between double and triple the difference compared to the previous measurement, simplify the process of understanding count, also saves the cost of using the robotic arm, but then be able to do in the office precision elevation angle and azimuth under the relevant circumstances mm level.Finally, this paper studied the influence of two factors PCV measurement accuracy, as well as corrections to the baseline solution PCV different Beidou satellite constellation and different environment. Baseline values averaged error reduced by 10%-15% of the results. Proved an important influence measurement accuracy and PCV model for high-precision baseline solution.