Assessing the feasibility of atmospheric water vapor monitoring with standalone BDS receiver

IF 2.9 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Linghao Zhou, Lei Fan, Shiwei Guo, Chuang Shi
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引用次数: 0

Abstract

The accurate monitoring of atmospheric water vapor is important for disaster prevention and environmental management. The ground-based BeiDou Navigation Satellite System (BDS) technique for atmospheric water vapor monitoring has demonstrated high accuracy and stable performance. Considering autonomy and safety, the standalone BDS receiver will be promoted in China and its surrounding areas for meteorological applications. To verify the feasibility of standalone BDS receivers for atmospheric water vapor monitoring, we evaluated the accuracy        of precipitable water vapor (PWV) retrieved from standalone BDS receivers and compared it with common multi-GNSS receivers using radiosonde and ERA5 products as references. The results showed that the zenith tropospheric delay (ZTD) derived from standalone BDS receivers achieved a root mean square (RMS) of 8.2 mm compared with the International GNSS Service (IGS) final zenith path delay (ZPD) products from co-located IGS Multi-GNSS Experiment (MGEX) stations. Subsequently, the PWV values derived from the two types of receivers were assessed with the radiosonde and ERA5-derived PWV. Compared with radiosonde, the RMS of the PWV differences for standalone BDS and IGS MGEX receivers was 1.9 and 1.6 mm, respectively. While compared with the ERA5 products, the RMS was 1.5/1.7 mm for IGS MGEX stations and 1.7/1.9 mm for standalone BDS stations. The monitoring performances during rainy and non-rainy days were further analyzed, and negligible differences (less than 0.15 mm) between the PWV accuracies were observed. This partially demonstrates that compared with the IGS MGEX receivers, the standalone BDS receiver is capable of monitoring atmospheric water vapor with consistent accuracy under all-weather conditions.

评估用独立北斗系统接收机监测大气水汽的可行性。
大气水汽的准确监测对防灾和环境管理具有重要意义。基于地面的北斗卫星导航系统(BDS)大气水汽监测技术具有较高的精度和稳定的性能。考虑到自主性和安全性,北斗卫星导航系统接收机将在中国及周边地区推广,用于气象应用。为了验证独立BDS接收机用于大气水汽监测的可行性,我们以无线电探空仪和ERA5产品为参考,评估了从独立BDS接收机获取的可降水量(PWV)的精度,并将其与普通多gnss接收机进行了比较。结果表明,与国际GNSS服务(IGS)多GNSS实验站(MGEX)的最终天顶路径延迟(ZPD)产品相比,BDS独立接收机获得的天顶对流层延迟(ZTD)的均方根(RMS)为8.2 mm。随后,用无线电探空仪和era5衍生的PWV评估两种接收器的PWV值。与探空仪相比,独立BDS和IGS MGEX接收机的PWV差异的均方根值分别为1.9和1.6 mm。与ERA5产品相比,IGS MGEX站的RMS为1.5/1.7 mm,独立BDS站的RMS为1.7/1.9 mm。进一步分析了雨天和非雨天的监测性能,发现PWV精度之间的差异可忽略不计(小于0.15 mm)。这部分表明,与IGS MGEX接收机相比,独立的BDS接收机能够在全天候条件下以一致的精度监测大气水蒸气。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Environmental Monitoring and Assessment
Environmental Monitoring and Assessment 环境科学-环境科学
CiteScore
4.70
自引率
6.70%
发文量
1000
审稿时长
7.3 months
期刊介绍: Environmental Monitoring and Assessment emphasizes technical developments and data arising from environmental monitoring and assessment, the use of scientific principles in the design of monitoring systems at the local, regional and global scales, and the use of monitoring data in assessing the consequences of natural resource management actions and pollution risks to man and the environment.
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