Research On Beidou Single Epoch Algorithm And Development Of Deformation Monitoring System

The single epoch algorithm is discussed and the deformation monitoring applications with Beidou navigation system adding single epoch algorithm are investigated,a single epoch data real-time deformation monitoring software is written based on the.Net platform of visual C#language,and Beidou and GPS single epoch data accuracy are also analyzed in this paper.Firstly,the Beidou satellite navigation and GNSS single epoch application in deformation monitoring are briefly introduced,and the advantage of Beidou adding single epoch algorithm in the deformation monitoring is analyzed.Secondly,some related theories of GNSS deformation monitoring discussed,including time system,coordinate system and RINEX format description,deformation monitoring error and pseudo observations and carrier phase observation.Then the algorithm involved in single epoch deformation monitoring is studied,the mutual transformation between the coordinate and time,the calculation of satellite position and the principle of single epoch solution calculation are analyzed respectively and damping lambda method for solving integer ambiguity is introduced.Finally,based on the theory and algorithm discussed above,a single epoch data real-time monitoring software is written and the software were verified and analyzed by the data captured.A fixed IP computer is served as the server in this system,the data in the client(receiver)are transmitted to the server in real time through the wireless network(GPRS/CDMA).On the server,the original binary data of the receiver were transformed into hexadecimal,the corresponding ephemeris and observation data are extracted and written to the RINEX format and single epoch is calculated.This will maximize the use of data,the user can monitor the deformation in real-time and can post-process with static data.Then the RINEX files obtained are introduced using lgo import to validate RINEX file integrity and accuracy,Beidou and GPS single epoch data are analyzed and compared.The single epoch data real-time deformation monitoring software not only overcomes the limitations of traditional GPS observations,and also integrates the autonomous research and development of the Beidou satellite navigation system,which effectively improves the data stability and accuracy,and provides a reliable guarantee for the project.