| 京津冀地区GNSS对流层延迟空间插值研究 |
| |
| 引用本文： | 王勇,郝振航,娄泽生,石强,李江波.京津冀地区GNSS对流层延迟空间插值研究[J].全球定位系统,2019,44(1):101-107. |
| |
| 作者姓名： | 王勇 郝振航 娄泽生 石强 李江波 |
| |
| 作者单位： | 1.天津城建大学 地质与测绘学院,天津 300384 |
| |
| 基金项目： | 天津市自然科学基金(17JCYBJC21600);河北省自然科学基金(D2015209024) |
| |
| 摘 要： | 对流层延迟差异影响合成孔径雷达干涉测量技术(InSAR)形变测量精度;水汽的变化影响天气变化.对流层延迟与水汽具有较好的对应,因此有必要开展全球导航卫星系统(GNSS)对流层延迟的插值研究.以京津冀地区为例,针对GNSS对流层延迟,开展对流层延迟的空间插值研究.首先开展了GNSS对流层延迟与水汽的比较分析,两者存在显著正相关特性,相关性超过91.7%,论证了对流层延迟取代水汽的可行性.然后利用反距离权重法对京津冀地区2016年9月至2017年8月的12组GNSS测站对流层延迟进行空间插值,通过提取插值点对流层延迟与GNSS站点对流层延迟比较验证空间插值精度.全年数据平均偏差最大为1.12cm,均方根误差最大为0.89cm;未发生降水过程平均偏差最大为1.25cm,均方根误差最大为0.82cm;发生降水过程平均偏差最大为1.08cm,均方根误差最大为1.38cm.京津冀平原区域的GNSS对流层延迟空间插值结果精度满足气象等应用要求,可为气象预报和InSAR大气校正提供参考.
|
| 关 键 词： | 对流层延迟 水汽 插值 京津冀 气象预报 大气校正 |
Study on GNSS zenith tropospheric delay spatial interpolation in -Beijing-Tianjin-Hebei region |
| |
| WANG Yong,HAO Zhenhang,LOU Zesheng,SHI Qiang,LI Jiangbo.Study on GNSS zenith tropospheric delay spatial interpolation in -Beijing-Tianjin-Hebei region[J].Gnss World of China,2019,44(1):101-107. |
| |
| Authors: | WANG Yong HAO Zhenhang LOU Zesheng SHI Qiang LI Jiangbo |
| |
| Institution: | 1.School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China2.Hebei Province Meteorological Bureau, Shijiazhuang 050022, China |
| |
| Abstract: | The difference of zenith tropospheric delay (ZTD) during different periods affects the accuracy of InSAR deformation; changes in precipitable water vapor (PWV) affect weather changes. The ZTD has a good correlation with PWV, so it is necessary to carry out an interpolation study of GNSS ZTD. Taking Beijing-Tianjin-Hebei region as an example, the spatial interpolation of ZTD is studied for GNSS ZTD. Firstly, the comparative analysis of ZTD and PWV in GNSS is carried out. The two have significant positive correlation characteristics, and the correlation is larger than 91.7％. The feasibility of ZTD to replace PWV is demonstrated. Then, using the inverse distance weighting method, that of 12 groups of GNSS stations in Beijing-Tianjin-Hebei region from September 2016 to August 2017 are spatially interpolated. The spatial interpolation accuracy is verified by extracting the ZTD of the interpolation points and that of the GNSS station. The average deviation of the annual data is 1.12 cm, the root mean square error is 0.89 cm; the average deviation of non-precipitation is 1.25 cm, the root mean square error is 0.82 cm, and the average deviation of precipitation is 1.08 cm, the root mean square error is 1.38 cm. The GNSS ZTD spatial interpolation results in as a Beijing-Tianjin-Hebei plain area meet the meteorological requirements, which can provide as a reference for meteorological forecasting and InSAR atmospheric correction. |
| |
| Keywords: | zenith tropospheric delay precipitable water vapor spatial interpolation Beijing-Tianjin-Hebei meteorological forecasting atmospheric correction |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《全球定位系统》浏览原始摘要信息 |
| 点击此处可从《全球定位系统》下载免费的PDF全文 |
|
