Results 21 to 30 of about 2,030 (237)

Vibroimpact Dynamics of a Tethered Satellite System

open access: yesShock and Vibration, 2017
This paper presents the vibroimpact dynamics of an in-plane tethered subsatellite caused by sudden braking during deployment or retrieval. The full dynamics of the subsatellite are composed of its free-flight and the instantaneous impacts.
B. S. Yu, H. Wen
doaj   +1 more source

Satellite relocation by tether deployment [PDF]

open access: yesJournal of Guidance, Control, and Dynamics, 1991
Several new uses of satellite tethers are discussed, including: (1) using tether extension to reposition a satellite in orbit without fuel expenditure by extending a mass on the end of a tether; (2) using a tether for energy storage to power the satellite during eclipse; and (3) using a tether for eccentricity pumping to correct perturbations in the ...
Geoffrey A. Landis, Frank J. Hrach
openaire   +1 more source

Robust control of a hub-spoke tethered formation system of microsatellites using Hamilton-Jacobi inequality

open access: yesКосмические аппараты и технологии, 2022
The problem of controlling a rotating hub-spoke tethered formation system in low Earth orbit is considered, in which microsatellites are located radially around the central spacecraft (hub) and connected to it by tethers (spokes). To analyze the dynamics
S. Chen, Yu. M. Zabolotnov
doaj   +1 more source

Dynamics and Control of Tethered Satellite System in Elliptical Orbits under Resonances

open access: yesInternational Journal of Aerospace Engineering, 2020
This paper studies resonance motions of a tethered satellite system (TSS) in elliptical orbits. A perturbation analysis is carried out to obtain all possible resonance types and corresponding parameter relations, including internal resonances and ...
Zhaojun Pang   +3 more
doaj   +1 more source

A Novel Method to Derive Exospheric Temperatures from Swarm Thermospheric Densities during Quiet Times

open access: yesRemote Sensing, 2022
One of the most important parameters in the atmosphere, the neutral temperature, becomes difficult to measure at high altitudes such as the exosphere. Therefore, based on the assumption of static equilibrium and isothermal atmosphere, a new method was ...
Yingyun Lin   +3 more
doaj   +1 more source

The Arctic Subpolar Gyre sTate Estimate: Description and Assessment of a Data‐Constrained, Dynamically Consistent Ocean‐Sea Ice Estimate for 2002–2017

open access: yesJournal of Advances in Modeling Earth Systems, 2021
A description and assessment of the first release of the Arctic Subpolar gyre sTate Estimate (ASTE_R1), a data‐constrained ocean‐sea ice model‐data synthesis, is presented. ASTE_R1 has a nominal resolution of 1/3° and spans the period 2002–2017.
An T. Nguyen   +5 more
doaj   +1 more source

Dynamics of structures of clusters of tethered satellite

open access: yesMATEC Web of Conferences, 2016
In this paper, we study the nonlinear dynamics of clusters of tethered satellites via numerical step-by-step time integration of the differential equations of motion. The basic algorithm is Central Difference explicit method.
Brasil R.-M.-L.-R.-F.   +3 more
doaj   +1 more source

Analysis of capability of air pollution monitoring from an unmanned aircraft

open access: yesAviation, 2014
Satellite monitoring systems can be used for remote monitoring of the atmosphere over a given area but they do not provide information on the state of pollution at a given time.
Augustyn Chwaleba   +3 more
doaj   +1 more source

Evaluating the efficacy of using GPS satellite transmitters to assess movement of bigheaded carp in a riverine system

open access: yesEcological Solutions and Evidence, 2023
We have evaluated the feasibility of using GPS satellite transmitters on invasive bigheaded carp species, silver carp and bighead carp, that could determine patterns of movement, identify potential feeding and spawning areas, and inform a comprehensive ...
Andrew Mathis, Kevin Irons, James Lamer
doaj   +1 more source

Natural Frequencies of a Tethered Satellite System

open access: yesApplied Sciences
This study investigated the natural frequencies of a tethered satellite system to enhance stability and operational reliability. Tethered satellite systems provide many advantages for space missions but exhibit inherently complex dynamics due to the ...
Yihun Yoon, Woojae Jang, Jintai Chung
doaj   +1 more source

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