气候变化领域集成服务门户(CCPortal): Benefit of enhanced electrostatic and optical accelerometry for future gravimetry missions

CCPortal

DOI	10.1016/j.asr.2023.12.067
	Benefit of enhanced electrostatic and optical accelerometry for future gravimetry missions
	Kupriyanov, Alexey; Reis, Arthur; Schilling, Manuel; Muelller, Vitali; Muelller, Julrgen
发表日期	2024
ISSN	0273-1177
EISSN	1879-1948
起始页码	73
结束页码	6
卷号	73 期号:6
英文摘要	Twenty years of gravity observations from various satellite missions have provided unique data about mass redistribution processes in the Earth system, such as melting of Greenland's ice shields, sea level changes, ground and underground water depletion, droughts, floods, etc. The ongoing climate change underlines the urgent need to continue this kind of observations with future gravimetry missions using enhanced concepts and sensors. This paper studies the benefit of enhanced electrostatic and novel optical accelerometers and gradiometers for future gravimetry missions. One of the limiting factors in the current space gravimetry missions is the drift of the Electrostatic Accelerometers (EA) which dominates the error contribution at low frequencies (<1mHz). This study focuses on the modeling of enhanced EAs with laser-interferometric readout, so-called optical accelerometers, and on evaluating their performance for gravity field recovery in future satellite missions. In this paper, we simulate gravimetry missions in multiple scopes, applying various software modules for satellite dynamics integration, accelerometer (ACC) and gradiometer simulation and gravity field recovery. The total noise budgets of the modeled enhanced electrostatic and optical ACCs show a similar sensitivity as the ACC concepts from other research groups. Parametrization w.r.t. the weight of the test mass (TM) of ACCs and the gap between the TM and the surrounding electrode housing confirmed the fact known from previous results that an ACC with a heavier TM and a larger gap will perform better. Our results suggest that the anticipated gain of novel ACCs might at some point be potentially limited by noise from the inter-satellite laser ranging interferometry. In order to present the advantage of the novel sensors, time-variable background models and associated aliasing errors were not considered in our simulations. The utilization of enhanced EAs and optical ACCs shows a significant improvement of accuracy compared to the currently used GRACE-like EA. In addition, their benefit in double satellite pairs in a so-called Bender constellation as well as in the combination of low-low satellite-to-satellite tracking with cross-track gradiometry has been investigated. (c) 2024 COSPAR. Published by Elsevier B.V. All rights reserved.
英文关键词	Accelerometer; Gradiometer; Optical interferometry; NGGM; Gravimetry
语种	英语
WOS研究方向	Engineering ; Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Engineering, Aerospace ; Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001179515100001
来源期刊	ADVANCES IN SPACE RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305293
作者单位	Leibniz University Hannover; Max Planck Society; Leibniz University Hannover; Helmholtz Association; German Aerospace Centre (DLR)
推荐引用方式 GB/T 7714	Kupriyanov, Alexey,Reis, Arthur,Schilling, Manuel,et al. Benefit of enhanced electrostatic and optical accelerometry for future gravimetry missions[J],2024,73(6).
APA	Kupriyanov, Alexey,Reis, Arthur,Schilling, Manuel,Muelller, Vitali,&Muelller, Julrgen.(2024).Benefit of enhanced electrostatic and optical accelerometry for future gravimetry missions.ADVANCES IN SPACE RESEARCH,73(6).
MLA	Kupriyanov, Alexey,et al."Benefit of enhanced electrostatic and optical accelerometry for future gravimetry missions".ADVANCES IN SPACE RESEARCH 73.6(2024).