Journal of Geophysical Research: Planets, Volume 128, Issue 8, August 2023., 2023 Abstract We observed Io with the James Webb Space Telescope (JWST) while the satellite was in eclipse, and detected thermal emission from several volcanoes. The data were taken as part of our JWST‐ERS program #1373 on 15 November 2022. Kanehekili Fluctus was exceptionally bright, and Loki Patera had most likely entered a new brightening phase.
Imke de Pater +26 more
wiley +1 more source
Optimal Design of Satellite Constellation Korean Peninsula Regions [PDF]
Journal of Astronomy and Space Sciences, 2008 Designing satellite constellations providing partial coverage of certain regions becomes more important as small low-altitude satellites receives an increasing attention due to its cost-effectiveness analysis.
Nam-Kyun Kim +3 more
doaj +1 more source
Bivariate Infinite Series Solution of Kepler’s Equations
Mathematics, 2021 A class of bivariate infinite series solutions of the elliptic and hyperbolic Kepler equations is described, adding to the handful of 1-D series that have been found throughout the centuries.
Daniele Tommasini
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Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere mass density
Journal of Space Weather and Space Climate, 2021 The satellite acceleration data from the CHAMP, GRACE, GOCE, and Swarm missions provide detailed information on the thermosphere density over the last two decades.
March Günther +5 more
doaj +1 more source
Real-Time Orbit Determination for Future Korean Regional Navigation Satellite System [PDF]
Journal of Astronomy and Space Sciences, 2016 This paper presents an algorithm for Real-Time Orbit Determination (RTOD) of navigation satellites for the Korean Regional Navigation Satellite System (KRNSS), when the navigation satellites generate ephemeris by themselves in abnormal situations.
Hyungjik Oh +2 more
doaj +1 more source
Improved GPS-based Satellite Relative Navigation Using Femtosecond Laser Relative Distance Measurements [PDF]
Journal of Astronomy and Space Sciences, 2016 This study developed an approach for improving Carrier-phase Differential Global Positioning System (CDGPS) based realtime satellite relative navigation by applying laser baseline measurement data.
Hyungjik Oh +4 more
doaj +1 more source
Implications of cohesive strength in asteroid interiors and surfaces and its measurement
Progress in Earth and Planetary Science, 2018 Recent observations and theory have indicated that rubble pile asteroids may have a small, but finite, level of tensile strength, allowing them to spin above their spin deformation limit as defined in Holsapple (Icarus 205:430–442, 2010).
Daniel J. Scheeres, Paul Sánchez
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Computation of Eclipse Time for Low-Earth Orbiting Small Satellites
International Journal of Aviation, Aeronautics, and Aerospace, 2019 This paper addresses a method for computing eclipse and daylight time for satellites in LEO. Continuous health-monitoring of the satellite is required for the success the mission.
Sumanth R M
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Preliminary Test of Adaptive Neuro-Fuzzy Inference System Controller for Spacecraft Attitude Control [PDF]
Journal of Astronomy and Space Sciences, 2012 The problem of spacecraft attitude control is solved using an adaptive neuro-fuzzy inference system (ANFIS). An ANFIS produces a control signal for one of the three axes of a spacecraft’s body frame, so in total three ANFISs are constructed for 3-axis ...
Sung-Woo Kim +2 more
doaj +1 more source
Application of Analytic Solution in Relative Motion to Spacecraft Formation Flying in Elliptic Orbit [PDF]
Journal of Astronomy and Space Sciences, 2008 The current paper presents application of a new analytic solution in general relative motion to spacecraft formation flying in an elliptic orbit. The calculus of variations is used to analytically find optimal trajectories and controls for the given ...
Hancheol Cho +2 more
doaj +1 more source