Results 21 to 30 of about 1,773 (142)

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

International 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, Zhonghua Du, Chun Cheng, Qingtao Wang   +3 more
doaj   +1 more source

Upgrade and automation of the JPL Table Mountain Facility tropospheric ozone lidar (TMTOL) for near-ground ozone profiling and satellite validation [PDF]

Atmospheric Measurement Techniques, 2019
As part of international efforts to monitor air quality, several satellite missions such as the Tropospheric Monitoring Instrument (TROPOMI) were deployed and others, like Tropospheric Emissions: Monitoring Pollution (TEMPO), are planned for the near ...
F. Chouza, T. Leblanc, M. Brewer, P. Wang   +3 more
doaj   +1 more source

Tethered Satellite System Stability [PDF]

, 1989
Abstract : Issues of stability of the Tethered Satellite System (TSS) during station-keeping, de- ployment and retrieval are considered. The basic nonlinear equations of motion of the TSS are derived using the system Lagrangian. Using the Hopf bifurcation theorem, tension control laws are established which guarantee the stability of the system during ...
Liaw, Der-Cherng, Abed, Eyad H.
openaire   +1 more source

Meteorological and air quality measurements in a city region with complex terrain: influence of meteorological phenomena on urban climate

Meteorologische Zeitschrift, 2023
On 8 and 9 July 2018 extensive observations were conducted under fair-weather conditions in the German city of Stuttgart and its surroundings. This intensive observation period, part of the four weeks Urban Climate Under Change (UC)2 campaign, intended ...
Abdul Samad, Olga Kiseleva, Christopher Claus Holst, Robert Wegener, Meinolf Kossmann, Gregor Meusel, Alina Fiehn, Thilo Erbertseder, Ralf Becker, Anke Roiger, Peter Stanislawsky, Dieter Klemp, Stefan Emeis, Norbert Kalthoff, Ulrich Vogt   +14 more
doaj   +1 more source

The future of Earth observation in hydrology [PDF]

Hydrology and Earth System Sciences, 2017
In just the past 5 years, the field of Earth observation has progressed beyond the offerings of conventional space-agency-based platforms to include a plethora of sensing opportunities afforded by CubeSats, unmanned aerial vehicles (UAVs), and smartphone
M. F. McCabe, M. Rodell, D. E. Alsdorf, D. G. Miralles, R. Uijlenhoet, W. Wagner, W. Wagner, A. Lucieer, R. Houborg, N. E. C. Verhoest, T. E. Franz, J. Shi, H. Gao, E. F. Wood   +13 more
doaj   +1 more source

An Improved Electron Pre-Sheath Model for TSS-1R Current Enhancement Computations

Aerospace, 2017
This report presents improvements of investigations on the Tethered Satellite System (TSS)-1R electron current enhancement due to magnetic limited collections.
Chunpei Cai
doaj   +1 more source

Dynamics and Control of a Tethered Satellite System Based on the SDRE Method

International Journal of Aerospace Engineering, 2016
This paper presents the nonlinear dynamic modeling and control of a tethered satellite system (TSS), and the control strategy is based on the state-dependent Riccati equation (SDRE).
Yong-Lin Kuo
doaj   +1 more source

On Tethered Satellite System Current Enhancement

, 2023
Improvements of investigations on the Tethered Satellite System (TSS)-1R electron current enhancement due to magnetic limited collections are reported. New analytical expressions are obtained for the potential and temperature changes across the pre-sheath. The mathematical treatments in this work are more rigorous than one past approach.
Cai, C., Cai, S., Cooke, D. L.
openaire   +2 more sources

Dynamic Analysis of Tethered Satellites with a Payload Moving Along a Flexible Tether

Applied Sciences
This study investigates the dynamic behavior of a three-body tethered satellite system with a flexible tether, focusing on a scenario in which a payload is transported along the tether connecting two satellites.
Yohan Ahn, Woojae Jang, Jeonga Lee, Jintai Chung   +3 more
doaj   +1 more source

Hardware-in-the-Loop Testing of Spacecraft Relative Dynamics and Tethered Satellite System on a Tip-Tilt Flat-Table Facility

Aerospace
This article presents a compact tip-tilting platform designed for hardware-in-the-loop emulation of spacecraft relative dynamics and a physical setup for testing tethered systems. The architecture consists of a granite slab supported by a universal joint
Giuseppe Governale, Armando Pastore, Matteo Clavolini, Mattia Li Vigni, Christian Bellinazzi, Catello Leonardo Matonti, Stefano Aliberti, Riccardo Apa, Marcello Romano   +8 more
doaj   +1 more source