亚洲地区EGNOS天顶对流层延迟模型单站修正与精度分析

摘要/Abstract

摘要：

以亚洲地区46个IGS站2008-2011年实测的高精度天顶对流层延迟（ZTD）数据为参考值，通过对2008-2010年EGNOS模型计算ZTD的日均偏差进行频谱分析，建立了亚洲地区EGNOS模型的单站修正模型（SSIEGNOS），对EGNOS和SSIEGNOS模型在亚洲地区的精度和适用情况进行了评估，结果表明：（1）EGNOS模型偏差和RMS在时间分布上呈现明显的季节变化规律，而SSIEGNOS模型偏差和RMS变化较小且平稳；（2）在空间分布上，两种模型的偏差随着经纬度和高程的变化均无明显规律，但随着高程或者纬度的增加RMS总体上都有递减的趋势；（3）SSIEGNOS模型预测ZTD的精度相对于EGNOS模型有明显提高。

关键词: 亚洲地区, EGNOS模型, EGNOS单站修正模型, 对流层天顶延迟, 精度分析

Abstract:

In this study, four years of the zenith tropospheric delay (ZTD) data from 2008 to 2011 are observed from 46 IGS sites distributed in Asian area is regarded as reference valve that used to assess the accuracy of ZTD calculated from EGNOS model. The Single-site Improved EGNOS model(named as SSIEGNOS model) over Asian is established by using three years of daily bias of the ZTD calculated from the EGNOS model that analyzed by Fast Fourier transformation, and the accuracy and application of the EGNOS model and SSIEGNOS model are also analyzed in Asian area. The results are: (1) the bias and RMS show a seasonal variation for the EGNOS model, while for the SSIEGNOS model, the bias and RMS are small and stable. (2) The relation between the bias and the altitude, longitude and latitude are not obvious for the two models, but the RMS decreases with increasing altitude or latitude. (3) Relative to EGNOS model, a significant improvement can be achieved using SSIEGNOS model to predict the ZTD.

Key words: Asian area, EGNOS model, SSIEGNOS model, Zenith tropospheric delay (ZTD), Accuracy analysis

中图分类号:

P228

黄良珂刘立龙文鸿雁姚朝龙. 亚洲地区EGNOS天顶对流层延迟模型单站修正与精度分析[J]. 测绘学报, 2014, 43(8): 808-817.

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