Journal of Aerospace Information Systems, 2017 Mauro Massari, Pierluigi Di Lizia
exaly +2 more sources
Research on BG characteristics of a new multi-bandgap PnC
AIP Advances, 2022 The bandgap (BG) of a phononic crystal (PnC) can suppress the propagation of elastic waves and has great potential in suppressing vibration. In this paper, a new type of multi-BG PnC is studied, which has many BGs in the low frequency. The eigenfrequency
Yake Dong +5 more
doaj +1 more source
Novel Structure and Thermal Design and Analysis for CubeSats in Formation Flying
Aerospace, 2021 The CANYVAL-C (CubeSat Astronomy by NASA and Yonsei using a virtual telescope alignment for coronagraph) is a space science demonstration mission that involves taking several images of the solar corona with two CubeSats—1U CubeSat (Timon) and 2U CubeSat (
Yeon-Kyu Park +2 more
doaj +1 more source
Fuel Optimization for Low Earth Orbit Maintenance [PDF]
Journal of Astronomy and Space Sciences, 2008 The resolution of Earth images taken from a satellite has close relation with satellite's altitude. If a satellite has lower altitude, it gets a picture having better resolution.
Yong Jae Park +3 more
doaj +1 more source
Laser-based Relative Navigation Using GPS Measurements for Spacecraft Formation Flying [PDF]
Journal of Astronomy and Space Sciences, 2015 This study presents a precise relative navigation algorithm using both laser and Global Positioning System (GPS) measurements in real time. The measurement model of the navigation algorithm between two spacecraft is comprised of relative distances ...
Kwangwon Lee +4 more
doaj +1 more source
Fuel-Optimal Altitude Maintenance of Low-Earth-Orbit Spacecrafts by Combined Direct/Indirect Optimization [PDF]
Journal of Astronomy and Space Sciences, 2015 This work presents fuel-optimal altitude maintenance of Low-Earth-Orbit (LEO) spacecrafts experiencing non-negligible air drag and J2 perturbation.
Kyung-Ha Kim +2 more
doaj +1 more source
Design of Novel Laser Crosslink Systems Using Nanosatellites in Formation Flying: The VISION
Aerospace, 2022 With growth in data volume from space missions, interest in laser communications has increased, owing to their importance for high-speed data transfer in the commercial and defense fields, spaceborne remote sensing, and surveillance.
Geuk-Nam Kim +10 more
doaj +1 more source
Unscented KALMAN Filtering for Spacecraft Attitude and Rate Determination Using Magnetometer [PDF]
Journal of Astronomy and Space Sciences, 2009 An Unscented Kalman Filter (UKF) for estimation of the attitude and rate of a spacecraft using only magnetometer vector measurement is developed. The attitude dynamics used in the estimation is the nonlinear Euler`s rotational equation which is augmented
Sung-Woo Kim +3 more
doaj +1 more source
The Earth-Moon Transfer Trajectory Design and Analysis using Intermediate Loop Orbits [PDF]
Journal of Astronomy and Space Sciences, 2009 Various Earth-Moon transfer trajectories are designed and analyzed to prepare the future Korea's Lunar missions. Minimum fuel trajectory solutions are obtained for the departure year of 2017, 2020, 2022, and every required mission phases are analyzed ...
Young-Joo Song +4 more
doaj +1 more source
Performance Comparison of the Batch Filter Based on the Unscented Transformation and Other Batch Filters for Satellite Orbit Determination [PDF]
Journal of Astronomy and Space Sciences, 2009 The main purpose of the current research is to introduce the alternative algorithm of the non-recursive batch filter based on the unscented transformation in which the linearization process is unnecessary.
Eunseo Park +2 more
doaj +1 more source