气候变化领域集成服务门户(CCPortal): Imprints of COVID-19 Lockdown on GNSS Observations: An Initial Demonstration Using GNSS Interferometric Reflectometry

CCPortal

DOI	10.1029/2020GL089647
	Imprints of COVID-19 Lockdown on GNSS Observations: An Initial Demonstration Using GNSS Interferometric Reflectometry
	Karegar M.A.; Kusche J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	The ongoing coronavirus disease 2019 (COVID-19) pandemic has imposed tight mobility restrictions in urban areas, causing substantial reduction in roadway traffic. Many public parking lots are nearly vacant as people across the world have gone on lockdown since mid-March. This environmental change may have impacts on Global Navigation Satellite System (GNSS) sensors installed on roof of buildings. Here, we use a monitoring site in Boston to exemplify a likely sensitivity of precise GNSS sensors to their nearby dynamic environments including parked vehicles in parking lots. We show that reduced number of parked vehicles since 23 March has decreased the reflector roughness, resulting in an increase in the reflected signal power whose amplitude is quantified by GNSS interferometric reflectometry technique. The uncertainty of retrieved GNSS antenna height drops with beginning of lockdown, allowing more accurate estimate of reflector height, which could have a general implication for better understanding of the fundamental limitations of the technique. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Antennas; Collision avoidance; Interferometry; Reflection; Reflectometers; Uncertainty analysis; Dynamic environments; Environmental change; Fundamental limitations; Global Navigation Satellite Systems; Mobility restrictions; Reflected signal; Reflectometry technique; Substantial reduction; Global positioning system; building; environmental change; environmental impact; GNSS; installation; observational method; precision; reflectometry; viral disease; Boston; Massachusetts; United States; Coronavirus
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169673
作者单位	Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany
推荐引用方式 GB/T 7714	Karegar M.A.,Kusche J.. Imprints of COVID-19 Lockdown on GNSS Observations: An Initial Demonstration Using GNSS Interferometric Reflectometry[J],2020,47(19).
APA	Karegar M.A.,&Kusche J..(2020).Imprints of COVID-19 Lockdown on GNSS Observations: An Initial Demonstration Using GNSS Interferometric Reflectometry.Geophysical Research Letters,47(19).
MLA	Karegar M.A.,et al."Imprints of COVID-19 Lockdown on GNSS Observations: An Initial Demonstration Using GNSS Interferometric Reflectometry".Geophysical Research Letters 47.19(2020).