ERA-Interim应用于中国地区地基GPS/PWV计算的精度评估

赵静旸; 宋淑丽; 朱文耀

doi:10.13203/j.whugis20120006

ERA-Interim应用于中国地区地基GPS/PWV计算的精度评估

¹ 中国科学院上海天文台,上海,200030;² 中国科学院大学,北京,100039

基金项目: 国家自然科学基金资助项目(10603011,11273048)；国家863计划资助项目(2009AA12Z307)

详细信息

作者简介:
赵静旸,博士生,主要从事空间大地测量以及GNSS气象学研究。

中图分类号: P228.42
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- 文章访问数: 1990
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出版历程
- 收稿日期: 2013-01-14
- 修回日期: 2014-08-04
- 发布日期: 2014-08-04

Accuracy Assessment of Applying ERA-Interim Reanalysis Data toCalculate Ground-based GPS/PWV over China

¹Shanghai Astronomical Observatory,Chinese Academy of Science,Shanghai 200030,China;²University of Chinese Academy of Sciences,Beijing 100039,China

Funds: The National Natural Science Foundation of China,Nos.10603011,11273048;the National High Technology Re-search and Development Program of China(863Program),No.2009AA12Z307.

More Information

Author Bio:
ZHAO Jingyang,PhD candidate,specializes in space geodesy and GNSS meteorology.

摘要

摘要: 目的由于中国绝大多数地基GPS网观测时未作气象观测,致使已积累的大量 GPS观测数据无法在气象领域发挥作用。针对这一情况,研究和分析了利用 ERA-Interim再分析产品获取中国地区气象资料和计算GPS/PWV的方法。以全国分布的24个气象观测站2006、2007年的气压、温度和相对湿度的实测资料为标准,评估了中国地区 ERA-Interim 再分析资料提取这三个参数和计算 GPS/PWV 所能达到的精度,并进行了精度评估。
- ERA-Interim /
- 气象参数 /
- GPS/PWV /
- 精度评估
Abstract: Objective Meteorological parameters are needed when ground-based GPS is used for the detection ofPWV(precipitable water vapor).However,a large amount of GPS data has not been sufficiently usedbecause of the lack of related meteorological data.In this paper,the methods and feasibility of deri-ving meteorological parameters from ERA-Interim reanalysis data and calculating GPS/PWV with theextracted parameters in China are assessed.The atmospheric pressure,temperature and relative hu-midity derived from ERA-Interim are compared with meteorological observation data at 24meteoro-logical stations from 2006to 2007,and the GPS/PWV calculated from the two data sets are also con-trasted.Results are as follows:① Atmospheric pressure derived from upper-air reanalysis data,tem-perature and relative humidity derived from surface reanalysis data,has relatively high precision.② The reanalysis parameters and meteorological observation data comparisons at 24stations show amean bias of 0.08hpa and a RMSD of 0.85hpa with atmospheric pressure,a mean bias of 0.05Kanda RMSD of 2.45Kwith temperature,a mean bias of 2.82%and a RMSD of 14.75% with relative hu-midity.③ The ERA-Interim reanalysis data is more reliable in the east of China than in the west.Theprecision of temperature and relative humidity data show seasonal variation.④ As compared withGPS/PWV calculated by the meteorological observation data,the GPS/PWV calculated by the ERA-Interim data give a mean difference of less than 0.5mm and a RMSD of less than 1mm.
- ERA-Interim /
- meteorological parameter /
- GPS/PWV /
- accuracy assessment

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参考文献(1)

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ERA-Interim应用于中国地区地基GPS/PWV计算的精度评估

作者简介: 赵静旸,博士生,主要从事空间大地测量以及GNSS气象学研究。

计量

出版历程

Accuracy Assessment of Applying ERA-Interim Reanalysis Data toCalculate Ground-based GPS/PWV over China

Author Bio: ZHAO Jingyang,PhD candidate,specializes in space geodesy and GNSS meteorology.

计量

出版历程

目录

作者简介:
赵静旸,博士生,主要从事空间大地测量以及GNSS气象学研究。

Author Bio:
ZHAO Jingyang,PhD candidate,specializes in space geodesy and GNSS meteorology.