Results 11 to 20 of about 1,818,861 (299)
Estimation of a General Along-Track Acceleration in the KOMPSAT-1 Orbit [PDF]
Journal of Astronomy and Space Sciences, 2002 General along-track acceleration was estimated in the KOMPSAT-1 orbit determination process. Several sets of the atmospheric drag and solar radiation pressure coefficients were also derived with the different spacecraft area.
Byoung-Sun Lee +2 more
doaj +1 more source
Remote Sensing, 2023 The global navigation satellite system (GNSS) is developing rapidly, and the related market applications and scientific research are increasing. Studies based on large low Earth orbit (LEO) satellite constellations have become research hotspots.
Baopeng Xu +8 more
doaj +1 more source
Two-Site Optical Observation and Initial Orbit Determination for Geostationary Earth Orbit Satellites [PDF]
Journal of Astronomy and Space Sciences, 2010 Optical observation system provides angle-only measurement for orbit determination of space object. Range measurement can be directly acquired using laser ranging or tone ranging system.
Jin Choi +4 more
doaj +1 more source
International Journal of Aerospace Engineering, 2016 The accuracy of autonomous orbit determination of Lagrangian navigation constellation will affect the navigation accuracy for the deep space probes. Because of the special dynamical characteristics of Lagrangian navigation satellite, the error caused by ...
Youtao Gao +3 more
doaj +1 more source
Extension of the sun-synchronous Orbit [PDF]
, 2010 Through careful consideration of the orbit perturbation force due to the oblate nature of the primary body a secular variation of the ascending node angle of a near-polar orbit can be induced without expulsion of propellant.
Bosquillon de Frescheville, Francois +9 more
core +4 more sources
Precise Orbit Determination of BDS MEO Satellites Based on Satellite TT&C Stations
International Journal of Aerospace Engineering, 2016 A novel method, which is based on the triple-frequency combination and Space-Based Telemetry, Tracking, and Command (STT&C) stations, is proposed in this paper.
Kezhao Li +5 more
doaj +1 more source
Precise orbit determination of Spire nano satellites [PDF]
, 2023 Spire Global, Inc. operates a growing fleet of currently more than 100 CubeSats in different low Earth orbits for commercial Earth observation. These satellites are equipped with dual-frequency GPS receivers and an attitude determination and control ...
Heike Peter +9 more
core +2 more sources
A Parallel Approach for Multi-GNSS Ultra-Rapid Orbit Determination
Remote Sensing, 2021 Global Navigation Satellite System (GNSS) ultra-rapid orbit is critical for geoscience and real-time engineering applications. To improve the computational efficiency and the accuracy of predicted orbit, a parallel approach for multi-GNSS ultra-rapid ...
Chunhua Jiang +5 more
doaj +1 more source
Relative Navigation to Non-Cooperative Targets in LEO: Achievable Accuracy from Radar Tracking Measurements [PDF]
, 2013 Any future space debris removal or on-orbit servicing mission faces the problem of the initial relative orbit determination of the servicing satellite to the non-cooperative target.
Letsch, Klemens +5 more
core +1 more source
Remote Sensing, 2022 Future Geosynchronous Synthetic Aperture Radar (GEOSAR) missions will provide permanent monitoring of continental areas of the planet with revisit times of less than 24 h.
Jorge Nicolás-Álvarez +6 more
doaj +1 more source