Generation of Meteorological Parameters for Tropospheric Delay on GNSS Signal

Journal of Astronomy and Space Sciences

In-Kwan Park¹  Jeongho Baek¹  Jung Hyun Jo¹  Jong-Uk Park¹  Sungki Cho¹  Sung-Wook Jung¹  Jaewon Lee¹ 

[1] Korea Astronomy & Space Science Institute, Yuseong-gu, Daejeon 305-348, Korea;

关键词: GNSS meteorology;    troposphere;    interpolation;   

DOI  :  10.5140/JASS.2008.25.3.267

来源: DOAJ

【 摘 要 】

The GNSS (Global Navigation Satellite System) signal is delayed by the neutral atmosphere at the troposphere, so that the delay is one of major error sources for GNSS precise positioning. The tropospheric delay is an integrated refractive index along the path of GNSS signal. The refractive index is empirically related to standard meteorological variables, such as pressure, temperature and water vapor partial pressure, therefore the tropospheric delay could be calculated from them. In this paper, it is presented how to generate meteorological data where observation cannot be performed. KASI (Korea Astronomy & Space Science Institute) has operated 9 GPS (Global Positioning System) permanent stations equipped with co-located MET3A, which is a meteorological sensor. Meteorological data are generated from observations of MET3A by Ordinary Kriging. To compensate a blank of observation data, simple models which consider periodic characteristics for meteorological data, are employed.

【 授权许可】

Unknown