中长距离网络RTK大气延迟的Kriging插值方法研究

基金项目: 国家自然科学基金资助项目(60972052);;山东省中青年科学家奖励基金资助项目(BS2010SF018)

详细信息

Kriging Interpolation for Atmospheric Delay of Medium-and Long-range Network-RTK

¹ School of Civil Engineering,Shandong Jianzhu University,Fengming Road,Ji'nan 250101,China;² South Surveying Corporation Ji'nan Branch,19 Jiefang Road,Ji'nan 250013,China

Funds: 国家自然科学基金资助项目(60972052);;山东省中青年科学家奖励基金资助项目(BS2010SF018)

摘要: 利用普通Kriging插值的指数函数模型和高斯函数模型,精密地实时估计网络RTK中用户站每一历元的大气延迟。利用一个含6个参考站的GPS网络(参考站间距为38.8～132.7km)的观测数据进行了实验,结果表明,对于长度为79.1km的基线的双差电离层延迟和双差对流层延迟,相应的Kriging插值(指数模型和高斯模型)的精度一般可达2cm和5cm,这表明普通Kriging插值可用于网络RTK用户站的大气延迟内插。
- Kriging插值 /
- 变异函数 /
- 大气延迟 /
- 网络RTK
Abstract: Based on ionospheric and tropospheric delay calculated through a GPS reference station network,ordinary Kriging interpolation with Exponential and Gaussian functional model was investigated to estimate epoch-by-epoch ionospheric and tropospheric delay respectively for network-RTK user station.A GPS reference network including six stations(baselines range from 38.8 km to 132.7 km) was used to test Kriging interpolation method.Experimental results show that approximate 2 cm and 5 cm interpolation accuracy respectively for ionospheric and tropospheric delay for a baseline of 79.1 km is achieved using ordinary Kriging interpolation,which indicates that ordinary Kriging(Exponential and Gaussian functional model) is suitable for atmospheric delay interpolation of user station in medium-and long-range network-RTK system.
- Kriging interpolation /
- variogram /
- atmospheric delay /
- network RTK