Noise Analysis of GPS Coordiante Time Series
首发时间:2015-11-17
Abstract:The noise property not only affects the accuracy of the parameter estimation, but also reflects the various driving factors of the environment. Therefore, the noise model is the basis of designing the optimal parameter estimation, and it is also the premise of various geometric, physical, and other parameters based on the observation data. Noise analysis is very important in the data processing. The noise property of the GPS coordinate time series has been explored in detail in this paper. Because of the electronic GPS receiver collecting data with high sampling rate, colored noise arise in the GPS coordinate time series. The methods of determining the stochastic model of GPS coordinate noise are discussed in detail. The results show that the GPS real-time measurement deviations have a high autocorrelation, which should be considered in the GPS high-precision positioning.
keywords: GPS noise analysis autocorrelation function white noise colored noise
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GPS坐标时间序列噪声特性分析
摘要:噪声模型不仅影响参数估计的精度,同时还反映自然界的各种驱动因素,所以噪声模型是设计最优参数估计的基础;同时也是基于观测数据精确反演各种几何、物理以及其它参数的前提。因此建立正确的噪声模型是测绘数据处理的一项重要研究内容。本文主要针对GPS坐标时间序列的噪声特性进行了分析,并采用统计模型量化噪声,对坐标序列中含有的白色噪声和有色噪声进行估计,确定了相应的白色噪声和有色噪声的分布及统计特性,为GPS在高精度的形变监测等应用领域提供有效的理论支持。
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No.4661034110808914****
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