气候变化领域集成服务门户(CCPortal): Noise Characteristics of Operational Real-Time High-Rate GNSS Positions in a Large Aperture Network

CCPortal

DOI	10.1029/2019JB019197
	Noise Characteristics of Operational Real-Time High-Rate GNSS Positions in a Large Aperture Network
	Melgar D.; Crowell B.W.; Melbourne T.I.; Szeliga W.; Santillan M.; Scrivner C.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	Large earthquakes are difficult to model in real-time with traditional inertial seismic measurements. Several algorithms that leverage high-rate real-time Global Navigation Satellite Systems (HR-GNSS) positions have been proposed, and it has been shown that they can supplement the earthquake monitoring effort. However, analyses of the long-term noise behavior of high-rate real-time GNSS positions, which are important to understand how the data can be used operationally by monitoring agencies, have been limited to just a few sites and to short time spans. Here, we show results from an analysis of the noise characteristics of 1 year of positions at 213 GNSS sites spanning a large geographic region from Southern California to Alaska. We characterize the behavior of noise and propose several references noise models which can be used as baselines to compare against as technological improvements allow for higher precision solutions. We also show how to use the reference noise models to generate realistic synthetic noise that can be used in simulations of HR-GNSS waveforms. We discuss spatiotemporal variations in the noise and their potential sources and significance. We also detail how noise analysis can be used in a dynamic quality control to determine which sites should or should not contribute positions to an earthquake modeling algorithm at a particular moment in time. We posit that while there remain important improvements yet to be made, such as reducing the number of outliers in the time series, the present quality of real-time HR-GNSS waveforms is more than sufficient for monitoring large earthquakes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	GNSS; seismology
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187786
作者单位	Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Geology Department, Central Washington University, Ellensburg, WA, United States
推荐引用方式 GB/T 7714	Melgar D.,Crowell B.W.,Melbourne T.I.,et al. Noise Characteristics of Operational Real-Time High-Rate GNSS Positions in a Large Aperture Network[J],2020,125(7).
APA	Melgar D.,Crowell B.W.,Melbourne T.I.,Szeliga W.,Santillan M.,&Scrivner C..(2020).Noise Characteristics of Operational Real-Time High-Rate GNSS Positions in a Large Aperture Network.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Melgar D.,et al."Noise Characteristics of Operational Real-Time High-Rate GNSS Positions in a Large Aperture Network".Journal of Geophysical Research: Solid Earth 125.7(2020).