气候变化领域集成服务门户(CCPortal): Initial GNSS Phase Altimetry Measurements From the Spire Satellite Constellation

CCPortal

DOI	10.1029/2020GL088308
	Initial GNSS Phase Altimetry Measurements From the Spire Satellite Constellation
	Nguyen V.A.; Nogués-Correig O.; Yuasa T.; Masters D.; Irisov V.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	The collection of phase coherent Global Navigation Satellite System (GNSS) reflected signals from radio occultation receivers in low-Earth orbit potentially offers the capability of deriving precise altimetry measurements over open and sea-ice-covered water at unprecedented coverage and low cost. Although past studies have verified the possibility of deriving altimetric measurements from GNSS observations, there is still uncertainty regarding the precision of this technique and its application. This study highlights the extraction of altimetric information from initial grazing angle GNSS reflection events observed by Spire satellites. Results show that the majority of coherent events occur over sea-ice-covered regions. A smaller number of coherent events are observed over the open ocean due to rougher scattering conditions. Altimetric retrieval was performed using dual frequency phase measurements from several events and compared to a model of the sea surface to demonstrate agreement to within 3 cm after the removal of the average height difference. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Coherent scattering; Communication satellites; Orbits; Phase measurement; Radio navigation; Satellites; Sea ice; Surface waters; Uncertainty analysis; Global Navigation Satellite Systems; Ice covered waters; ITS applications; Low earth orbits; Radio occultations; Reflected signal; Satellite constellations; Scattering conditions; Global positioning system; GNSS; ice cover; measurement method; open ocean; precision; satellite altimetry; satellite constellation; sea ice
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/170052
作者单位	Spire Global, Inc., Boulder, CO, United States; Spire Global, Inc., Glasgow, United Kingdom; Spire Global, Inc., Singapore, Singapore
推荐引用方式 GB/T 7714	Nguyen V.A.,Nogués-Correig O.,Yuasa T.,et al. Initial GNSS Phase Altimetry Measurements From the Spire Satellite Constellation[J],2020,47(15).
APA	Nguyen V.A.,Nogués-Correig O.,Yuasa T.,Masters D.,&Irisov V..(2020).Initial GNSS Phase Altimetry Measurements From the Spire Satellite Constellation.Geophysical Research Letters,47(15).
MLA	Nguyen V.A.,et al."Initial GNSS Phase Altimetry Measurements From the Spire Satellite Constellation".Geophysical Research Letters 47.15(2020).