time reference coordinate

The problem of datum about combined algorithms is studied in detail, the coordinate reference datum of basic space time reference system is analyzed, some algebraic constraints used to define the reference datum are studied in detail. 4.

研究了联合解算中的基准问题，分析了基本时空参考系的坐标参考基准，系统研究了定义参考基准的代数约束。

The Fourier analysis is carried out in a sliding coordinate system, eliminating the accumulated error caused by the difference between the internally generated time reference and the line cycle when performing discretization on Fourier algorithm.

另外，为了消除在对Fourier算法离散化时由于内部时钟与电网周期不完全同步引起的积累误差，采用了在滑动时间坐标系中进行Fourier分析的方法。

In the framework of general relativity, the definitions and transform methods about basic space time reference are studied, definitions of coordinate time reference and space coordinate reference are presented. 3.

在广义相对论框架下，研究了基本时空参考系BCRS和GCRS的定义及转换方法，给出了坐标时参考系和空间坐标参考系的定义。

It constructs noise autocorrelation function with the use of noise autocorrelation in the high-frequency GPS coordinate time series, puts forward the Kalman filtering denoising model based on the fractal algorithm, and fulfills GPS subsidence deformation extract and the reference point coordinates settlement corrections. 3.

利用高频GPS坐标时间序列中噪声的自相关性构建了噪声自相关函数，提出基于分形算法的Kalman滤波消噪模型，实现GPS沉降变形的提取与基准点坐标的沉降改正。