Results 21 to 30 of about 73,199 (242)

Star Formation in Satellite Galaxies [PDF]

The Astronomical Journal, 2006
We present narrow-band observations of the H$ $ emission in a sample of 31 satellite orbiting isolated giant spiral galaxies.
Guitérrez, C. M., Alonso Giraldes, Maria Sol, Funes, Jose Gabriel, Ribeiro, M. B.   +3 more
openaire   +3 more sources

Tracking Control Design Using Sliding Mode Techniques for Satellite Formation Flying [PDF]

Journal of Astronomy and Space Sciences, 2003
Satellite formation flying is currently an active area of research in the aerospace engineering. So it has been researched by various authors. In this study, a tracking controller using sliding mode techniques was designed to control a satellite for the ...
Hyung-Chu Lim, Hyo-Choong Bang, Kwan-Dong Park, Pil-Ho Park   +3 more
doaj   +1 more source

Design and Analysis of the Integrated Drag-Free and Attitude Control System for TianQin Mission: A Preliminary Result

Aerospace
This article explores novel in-orbit drag-free technology that can be utilized for deep space detection scientific missions. In this study, we considered a two-test-mass drag-free method and analyzed the design of the drag-free and attitude control ...
Liwei Hao, Yingchun Zhang
doaj   +1 more source

ESTABLISHMENT OF SATELLITE FORMATION WITH INITIAL UNCERTAINTY BY CONTROL LYAPUNOV FUNCTION APPROACH

Journal of Aerospace Technology and Management, 2012
In recent years, dynamics and control of satellite formation flying have been active areas of research. From the mission planning perspective, three main areas namely formation establishment, maintenance and reconfiguration have been discussed.
M. Navabi, M. Barati, Hossein Bonyan Khamseh   +2 more
doaj   +1 more source

Control and reconfiguration of satellite formations by electromagnetic forces

Journal of Telecommunications and Information Technology, 2023
Current concept of interferometric missions assume that they employ formations of spacecraft. The cooperation between members of a multisatellite formation is a challenging problem.
Roman Wawrzaszek, Marek Banaszkiewicz
doaj   +1 more source

InSAR terrain mapping error sources based on satellite interferometry

Open Physics, 2022
To improve the accuracy of interferometric synthetic aperture radar (InSAR) topographic mapping, an error source analysis method of InSAR topographic mapping based on satellite interferometry is proposed.
Li Genger
doaj   +1 more source

Stochastic Robust H_∞ Decentralized Network Formation Tracking Control of Large-Scale Team Satellites via Event-Triggered Mechanism

IEEE Access, 2022
The team formation of large-scale satellites for communication services of future smart cities in the 5G and 6G era is an important research topic currently.
Bor-Sen Chen, Ying-Shuo Ma, Min-Yen Lee
doaj   +1 more source

Case Study of Along-Track Separation Maintenance of Distributed Synthetic Aperture Radar Systems in Low Earth Orbits

Aerospace
Parasitic SAR formation can be flown at low altitude using smaller satellites and adding potential to conventional SAR mission From the orbital point of view, the main issue is related to the differential aerodynamic drag, which rapidly disrupts the ...
Marco D’Errico
doaj   +1 more source

Determination of Initial Conditions for Satellite Formation Flying in Elliptical Orbits [PDF]

Journal of Astronomy and Space Sciences, 2005
The initial conditions that generate bounded motion in eccentric reference orbit are determined for satellite formation flying. Because Hill's equations cannot describe the relative motion between two satellites in eccentric orbit, a new relative ...
Woo-Kyoung Lee, Sung-Moon Yoo, Sang-Young Park, Kyu-Hong Choi, Young-Keun Chang   +4 more
doaj   +1 more source

FORMATION AND EVOLUTION OF PLUTO’S SMALL SATELLITES [PDF]

The Astronomical Journal, 2015
18 pages, 8 figures.
Kevin J. Walsh, Harold F. Levison
openaire   +2 more sources