本文针对现有利用FY-3 L1级数据反演PWV精度较低的现状,提出一种GNSS辅助FY-3/MERSI L1的高精度PWV反演方法,该方法引入GNSS精确估计PWV和大气透过率的模型回归系数;此外,顾及季节因素对大气水汽影响,分季节构建更加精确的模型回归系数;最后,...
降雨量与参数变化率间同样存在着明显关联:随着雨量的增加,PWV变化率也呈现出逐渐增加的趋势,并在雨量达到最大值时同步取得极大值,随后两者都同步减小,当降雨停止时,PWV变化率达到最小值;气压和相对湿度的变化率峰值几乎与雨量峰值同时出现...
The monitoring of atmospheric precipitable water vapor (PWV) via the Global Navigation Satellite System (GNSS) is a potent technique for the continuous collection of atmospheric moisture data, which is vital for regional weather observation and forecasting, especially in the context ...
首先根据热带气旋登陆后的地面密集GNSS站数据反演得到上空高时间分辨率PWV信息，对不同高程的GNSS站点PWV数据进行高程改正，得到统一高程面的GNSS‑PWV时序数据；S2、对改正后的GNSS‑PWV时间序列数据进行匹配，得到优选GNSS站的PWV数据；S3、根据气旋内部的水汽分布特征选择接近气旋附近的连续多个GNSS站点，并计算PWV...
(ZWD)5. One of the crucial steps in retrieving water vapor using GNSS technique is the conversion of ZWD into PWV6. This conversion is dependent on a conversion factor (II), which is determined by the weighted mean temperature of the atmosphere (Tm). This technique has many advantages, ...
进一步分析还发现,沙尘暴发生时,PWV差值与大气颗粒物浓度的相关性也显著提高,其中BJFS和CHAN站点的相关性超过70%.综合分析表明,沙尘暴发生时,PWV差值与大气颗粒物浓度的相关性进一步增高,这表明大气颗粒物对PWV差值的贡献比对PWV本身的贡献显著增加,从而说明了PWV差值方法在大气颗粒物浓度监测方面的潜在应用价值.因此,...
This branch is up to date with martinaborgeh/Africa-GNSS-PWV-Analyis:main.Folders and files Latest commit Cannot retrieve latest commit at this time. History3 Commits New_Reusable_Functions.ipynb Analysed GNSS PWV over Africa Jun 23, 2024 README.md added images Jun 23, 2024 image-1.png An...
First published: 07 March 2024 https://doi.org/10.1029/2023EA003136 Sections PDF Tools Share Abstract Atmospheric wet delay caused by Precipitable Water Vapor (PWV) significantly impacts the performance of many geodetic surveying systems such as Global Navigation Satellite System (GNSS). In this ...
我国风云三号(FY-3)系列卫星搭载的中分辨率光谱成像仪可用于大气水汽监测,但反演大气可降水量(PWV)时存在大气透过率参数低估、水汽与大气透过率回归系数经验选取的缺陷,无法满足在短临降雨监测、数值同化等高精度PWV应用方面的需求。针对该问题,本文提出一种GNSS辅助FY-3卫星的高精度PWV反演方法。本文方法引入高精度...