探讨了利用地基GPS气象学原理反演大气可降水量(precipitable water vapor,PWV)及其变化的可行性。从理论上分析了在缺少地面气象资料时用模型估计气象元素对反演PWV的影响,分析了用IGS超快速星历代替IGS最终精密星历准实时计算PWV的可...探讨了利用地基GPS气象学原理反演大气可降水量(precipitable water vapor,PWV)及其变化的可行性。从理论上分析了在缺少地面气象资料时用模型估计气象元素对反演PWV的影响,分析了用IGS超快速星历代替IGS最终精密星历准实时计算PWV的可行性。利用三峡地区13个监测点连续48 h以上的跟踪数据联合国内的几个IGS站,使用GAMIT软件进行了数据处理。展开更多
The estimation of Precipitable Water Vapor （PWV） derived from Global Positioning System （GPS） data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data （No.57494） in Wuhan. The ap...The estimation of Precipitable Water Vapor （PWV） derived from Global Positioning System （GPS） data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data （No.57494） in Wuhan. The applicability of Saastamoinen （SAAS）, Hopfield and Black models used for estimating Zenith Hydrostatic Delay （ZHD） and Zenith Wet Delay （ZWD） and different models is verified in the estimation of GPS-derived PWV for the applied area. The experimental results demonstrated that ： 1 ） the precision of PWV estimated from Black model used for calculating ZHD （ ZHDs ） is lower than that of SAAS （ ZHDsAAs ） model and Hopfield model （ZHDn） with the RMS of 4. 16 ram; 2） the RMS of PWV estimated from SAAS model used for calculating ZWD （SAAS） is 3.78 ram; 3 ） the well-known Bevis model gives similar accuracy compared with the site-specific models for Tm in terms of surface temperature （ Ts ） and surface pressure （Ps）, which can reach the accuracy inside 1 mm in the GPS-derived PWV estimates.展开更多
文摘探讨了利用地基GPS气象学原理反演大气可降水量(precipitable water vapor,PWV)及其变化的可行性。从理论上分析了在缺少地面气象资料时用模型估计气象元素对反演PWV的影响,分析了用IGS超快速星历代替IGS最终精密星历准实时计算PWV的可行性。利用三峡地区13个监测点连续48 h以上的跟踪数据联合国内的几个IGS站,使用GAMIT软件进行了数据处理。
基金supported by the National Natural Science Foundation of China(4106400141071294)+1 种基金Guangxi Key Laboratory of Spatial Information and Geomatics(GuiKeJi 1103108-06)the Natural Science Foundation of Guangxi(2012GXNSFAA053183)
文摘The estimation of Precipitable Water Vapor （PWV） derived from Global Positioning System （GPS） data at the IGS site WUHN is assessed by comparing with PWV obtained from radiosonde data （No.57494） in Wuhan. The applicability of Saastamoinen （SAAS）, Hopfield and Black models used for estimating Zenith Hydrostatic Delay （ZHD） and Zenith Wet Delay （ZWD） and different models is verified in the estimation of GPS-derived PWV for the applied area. The experimental results demonstrated that ： 1 ） the precision of PWV estimated from Black model used for calculating ZHD （ ZHDs ） is lower than that of SAAS （ ZHDsAAs ） model and Hopfield model （ZHDn） with the RMS of 4. 16 ram; 2） the RMS of PWV estimated from SAAS model used for calculating ZWD （SAAS） is 3.78 ram; 3 ） the well-known Bevis model gives similar accuracy compared with the site-specific models for Tm in terms of surface temperature （ Ts ） and surface pressure （Ps）, which can reach the accuracy inside 1 mm in the GPS-derived PWV estimates.
