The study on movement characteristics and non-linear model of CGCS2000 framework

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. © 2013 Springer-Verlag Berlin Heidelberg.