The Study on Movement Characteristics and Non-linear Model of CGCS2000 Framework
It is essential to establish Non-linear model of CGCS2000 framework to improve the precision of domestic coordinate system, which can provide support for precise orbit determination of Beidou satellites and precise point positioning. And it can also meet
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The Study on Movement Characteristics and Non-linear Model of CGCS2000 Framework Xiaoming Wang, Yingyan Cheng, Zhihao Jiang, Fuli Wang, Xing Chen and Xiaochao Li
Abstract It is essential to establish Non-linear model of CGCS2000 framework to improve the precision of domestic coordinate system, which can provide support for precise orbit determination of Beidou satellites and precise point positioning. And it can also meet the needs of high precision research and real time engineering project. Much research has been done about the movement characteristics and noise characteristics of CORS time series, however, this study only focus on how to improve the precision of linear velocity estimation on the colored noise properties of CORS Network and this method used has some flaws and limitations which may lead to unreliable result. In this paper, Singular Spectrum Analysis is introduced and based on which new interpolation and method, gross error detection method and signal–noise separation method has been introduced or proposed. The time series of domestic CORS network in china has been analyzed, as well as some IGS stations affected by earthquake. In this study, the SSA-P method is also proposed to produce more accurate forecast than traditional methods in current use. Keywords CGCS2000
Non-linear model SSA Time series
X. Wang (&) Y. Cheng F. Wang X. Chen Chinese Academy of Surveying and Mapping, Beijing 100830, China e-mail: [email protected] Z. Jiang National Geomantics Center of China, Wuhan University, Beijing 100048, China X. Li Qingdao Institute of Geotechnical Investigation and Surveying Research, Qingdao 266032, China
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 244, DOI: 10.1007/978-3-642-37404-3_31, Springer-Verlag Berlin Heidelberg 2013
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31.1 Introduction A Terrestrial Reference Frame (TRF) is a set of physical points with precisely determined coordinates in a specific coordinate system (cartesian, geographic, mapping…) attached to a Terrestrial Reference System. Such a TRF is said to be a realization of the TRS. To do research on movement characteristics and model of framework using the latest mathematical and surveying techniques to attempt to realize the TRS as precisely as possible is very important. It will improve the precision of domestic coordinate system by establishing non-linear model of CGCS2000 [1–6] coordinate frame, which include two aspects,the first aspect is studying the deformation modeling under the loading of surface water/atmosphere mass, the second aspect is studying the non-linear movement characteristics of stations which is affected by earthquake, which is always difficult to be modeled with using short, noisy time series. Some research has been done to study the method of linear velocity estimation of CORS Network in China based on the CGCS2000 frame. There are also many studies about non-linear movement characteristics of CORS network in china based on tradition
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