利用ERA5和IGS评估SIRGAS-CON对流层产品

IF 0.9 Q4 REMOTE SENSING
A. Prado, Telmo Vieira, M. Fernandes
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引用次数: 2

摘要

天顶对流层延迟(ztd)用于校正对流层效应导致的全球导航卫星系统(GNSS)接收机测量信号的延迟,以获得准确的测量结果。ZTD可以从GNSS处理中估计出来,这意味着它们可能会受到偶尔或系统错误的影响。因此,有必要随着时间的推移评估这些数据的质量和稳定性,因为ztd用于需要厘米精度的几种应用中。在此背景下,本工作旨在利用欧洲中期天气预报中心最新的数值天气模式ERA5和国际GNSS服务(IGS)的通用站点进行比较,评估整个美洲连续运行网络(SIRGAS-CON)大地测量参考系统(由467个站点组成)在2014年1月至2020年12月期间的可用ZTD。结果表明,10%的台站存在一定的不稳定性,例如数据高度分散或不连续的时期,其中位于阿根廷、乌拉圭和哥伦比亚的台站发生的频率更高。与ERA5和IGS相比,其余90%被证明具有稳定可靠的ZTD。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of SIRGAS-CON tropospheric products using ERA5 and IGS
Abstract Zenith Tropospheric Delays (ZTDs) are used to correct tropospheric effects that cause a delay in the signal measured by Global Navigation Satellite Systems (GNSS) receivers and obtain accurate measurements. ZTD can be estimated from GNSS processing, which means they may suffer from occasional or systematic errors. Therefore, it is necessary to assess the quality and stability of these data over time, since ZTDs are used in several applications that require centimeter precision. Within this context, this work aims to assess the available ZTD of the whole Geodetic Reference System for the Americas Continuously Operating Network (SIRGAS-CON), consisting of 467 stations, spanning the period from January 2014 to December 2020 using the most recent Numerical Weather Model ERA5 from the European Centre for Medium-Range Weather Forecasts and common stations to the International GNSS Service (IGS) for an intercomparison. Results show that 10% of the stations present some instability, such as periods of highly dispersed data or discontinuities, with more occurrence in stations located in Argentina, Uruguay and Colombia. The remaining 90% proved to have stable and reliable ZTD, both in comparison with ERA5 and IGS.
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来源期刊
Journal of Geodetic Science
Journal of Geodetic Science REMOTE SENSING-
CiteScore
1.90
自引率
7.70%
发文量
3
审稿时长
14 weeks
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