Research On High Precision Beidou Dynamic Four Antenna Orientation Technology

Beidou satellite navigation system plays an important role in many aspects, such as military, transportation and mapping. At the same time, the technology of orientation is attached importance to the new technology. Directional receiver has been used in many fields, such as the ocean, air, land, etc.In this paper, we mainly study the high precision of Beidou dynamic orientation technology based on the four antenna. The basic principle of the traditional dynamic orientation technology is introduced, the real-time performance of the algorithm is improved by the corresponding algorithm, and the directional accuracy is improved by using the four antenna baseline network. The specific content of this paper is as follows.Firstly, considering the real-time performance of the dynamic baseline solution, the paper presents a new algorithm for solving the integer ambiguity. The algorithm is based on the QR decomposition of the observation matrix, and the coordinate parameters are separated from the parameters of the fuzzy degree. Then, we introduce the sequential adjustment technology, this technology can make full use of the adjustment results of the prior epochs and the information of the current epoch. A large number of historical observation information need not be stored and the inverse matrix need not be solved. The results can be as same as multi epochs overall adjustment results. This technology can make real-time solution faster, storage space less and improve the utilization ratio of memory space. Finally, this paper presents a method based on the four antenna baseline network adjustment. The high precision of the baseline can make sure the high precision of the directional attitude angle. Baseline net adjustment refers to that the some baseline vectors are connected to the network, and then to get the overall adjustment. In this paper, the layout of the four antennas can improve the accuracy of the baseline, and the accuracy of the directional attitude angle is also improved.In this paper, the relevant theory and algorithm are studied. The directional function is successfully realized by using the Beidou dual frequency receiver. The accuracy and performance of the algorithm are verified by the experimental data.