气候变化领域集成服务门户(CCPortal): GRACE Follow-On Laser Ranging Interferometer Measurements Uniquely Distinguish Short-Wavelength Gravitational Perturbations

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DOI	10.1029/2020GL089445
	GRACE Follow-On Laser Ranging Interferometer Measurements Uniquely Distinguish Short-Wavelength Gravitational Perturbations
	Ghobadi-Far K.; Han S.-C.; McCullough C.M.; Wiese D.N.; Yuan D.-N.; Landerer F.W.; Sauber J.; Watkins M.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	We examined the first-ever laser ranging interferometer (LRI) measurements of inter-satellite tracking acquired by Gravity Recovery and Climate Experiment (GRACE) Follow-On satellites. Through direct along-orbit analysis of instantaneous inter-satellite measurements, we demonstrate the higher sensitivity of LRI (than K-band microwave ranging [KBR]) to anomalies associated with the Earth static gravity field at high spatial resolutions of 100–200 km. We found that LRI captures gravitational signals as small as 0.1 nm/s2 at 490 km altitude, improved by 1 order of magnitude from KBR. This allows LRI to uniquely detect un-/mis-modeled short-wavelength gravitational perturbations. We employed all LRI data in 2019 to validate various state-of-the-art global static gravity field models and show that LRI measurements, even over 1 month, can distinguish subtle differences among the models computed from ~15 years of GRACE KBR and ~4 years of Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) gradiometry data. Ultra-precise LRI measurements will be yet another critical data set for future gravity field model development. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Interferometers; Orbits; Gravitational perturbations; Gravity field and steady state ocean circulation explorers; Gravity field model; Gravity recovery and climate experiments; High spatial resolution; Interferometer measurement; Satellite measurements; Satellite tracking; Geodetic satellites; data set; GOCE; GRACE; gravity field; gravity wave; orbit determination; perturbation; spatial resolution; tracking; wavelength
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/169885
作者单位	School of Engineering, University of Newcastle, Callaghan, NSW, Australia; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Geodesy and Geophysics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Ghobadi-Far K.,Han S.-C.,McCullough C.M.,et al. GRACE Follow-On Laser Ranging Interferometer Measurements Uniquely Distinguish Short-Wavelength Gravitational Perturbations[J],2020,47(16).
APA	Ghobadi-Far K..,Han S.-C..,McCullough C.M..,Wiese D.N..,Yuan D.-N..,...&Watkins M.M..(2020).GRACE Follow-On Laser Ranging Interferometer Measurements Uniquely Distinguish Short-Wavelength Gravitational Perturbations.Geophysical Research Letters,47(16).
MLA	Ghobadi-Far K.,et al."GRACE Follow-On Laser Ranging Interferometer Measurements Uniquely Distinguish Short-Wavelength Gravitational Perturbations".Geophysical Research Letters 47.16(2020).