Results 11 to 20 of about 513,787 (184)
Extension of highly elliptical Earth orbits using continuous low-thrust propulsion [PDF]
, 2013 The extension of highly elliptical orbits, with free selection of orbit period, using low thrust propulsion is investigated. These newly proposed orbits, termed Taranis orbits, are enabled by existing low-thrust propulsion technology, offering a ...
Macdonald, Malcolm, Anderson, Pamela
core +3 more sources
Survey of highly non-Keplerian orbits with low-thrust propulsion [PDF]
, 2011 Celestial mechanics has traditionally been concerned with orbital motion under the action of a conservative gravitational potential. In particular, the inverse square gravitational force due to the potential of a uniform, spherical mass leads to a family
Biggs, James +3 more
core +3 more sources
Solar sail formation flying for deep-space remote sensing [PDF]
, 2009 In this paper we consider how 'near' term solar sails can be used in formation above the ecliptic plane to provide platforms for accurate and continuous remote sensing of the polar regions of the Earth.
Biggs, James +4 more
core +3 more sources
Quality of Orbit Predictions for Satellites Tracked by SLR Stations
Remote Sensing, 2021 This study aims to evaluate and analyze the orbit predictions of selected satellites: geodetic, Global Navigational Satellite Systems (GNSS), and scientific low-orbiting, which are tracked by laser stations.
Joanna Najder, Krzysztof Sośnica
doaj +1 more source
Remote Sensing, 2020 For low Earth orbiting satellites, non-gravitational forces cause one of the largest perturbing accelerations. During a precise orbit determination (POD), the accurate modeling of the satellite-body attitude and solar panel orientation is important since
Mathis Bloßfeld +3 more
doaj +1 more source
Formation Satellite Reconstruction Strategy Based on NSGA-II Algorithm
Shanghai Jiaotong Daxue xuebao, 2021 Aimed at the problem of avoidance strategy of formation satellites when facing the threat of space debris, a non-dominated sorting genetic algorithm (NSGA-II) is improved and used to code satellites. Besides, the improved differential evolution algorithm
SUN Hongqiang +2 more
doaj +1 more source
Disposal orbits for GEO spacecraft: A method for evaluating the orbit height distributions resulting from implementing IADC guidelines [PDF]
, 2010 Geostationary orbit (GEO) is the most commercially valuable Earth orbit. The Inter-Agency Space Debris Coordination Committee (IADC) has produced guidelines to help protect this region from space debris.
Hobbs, Stephen
core +1 more source
Balanced Low Earth Satellite Orbits
Advances in Astronomy, 2020 The present work aims at constructing an atlas of the balanced Earth satellite orbits with respect to the secular and long periodic effects of Earth oblateness with the harmonics of the geopotential retained up to the 4th zonal harmonic.
A. Mostafa, M. H. El Dewaik
doaj +1 more source
Is This a Satellite Orbiting Unchartered Territory? [PDF]
Echo Research & Practice, 2020 A 27-year old female i.v. drug user presented to our institution with chest pain. She had a history of bicuspid aortic valve endocarditis with aortic root abscess repaired with bioprosthetic aortic valve replacement and pericardial patch reconstruction of the left ventricular outflow tract and non-coronary sinus 6 weeks previously.
Handi Salim +3 more
openaire +3 more sources
Sensors, 2023 Direction-of-arrival (DoA) estimation methods are highly versatile and find extensive applications in satellite communication. DoA methods are employed across a range of orbits, from low Earth orbits (LEO) to geostationary Earth orbits (GEO).
Mutmainnah Hasib +3 more
doaj +1 more source