Results 21 to 30 of about 2,974 (210)

Monitoring Terrestrial Water Storage, Drought and Seasonal Changes in Central Oklahoma With Ambient Seismic Noise

open access: yesGeophysical Research Letters, Volume 50, Issue 17, 16 September 2023., 2023
Abstract Significant imbalances in terrestrial water storage (TWS) and severe drought have been observed around the world as a consequence of climate changes. Improving our ability to monitor TWS and drought is critical for water‐resource management and water‐deficit estimation.
Shuo Zhang   +4 more
wiley   +1 more source

An Energetic Eruption With Associated SO 1.707 Micron Emissions at Io's Kanehekili Fluctus and a Brightening Event at Loki Patera Observed by JWST

open access: yesJournal 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]

open access: yesJournal 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

Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere mass density

open access: yesJournal 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

Bivariate Infinite Series Solution of Kepler’s Equations

open access: yesMathematics, 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
doaj   +1 more source

Real-Time Orbit Determination for Future Korean Regional Navigation Satellite System [PDF]

open access: yesJournal 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

Implications of cohesive strength in asteroid interiors and surfaces and its measurement

open access: yesProgress 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
doaj   +1 more source

Computation of Eclipse Time for Low-Earth Orbiting Small Satellites

open access: yesInternational 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
doaj   +1 more source

Feedback Tracking Control Based on a Trajectory-Specific Finite-Time Causal Inverse

open access: yes, 2016
Astrodynamics 2015 : proceedings of the AAS/AIAA Astrodynamics Specialist Conference held August 9 - 13, 2015, Vail, Colorado, U.S.A ...
Longman, Richard W.   +4 more
core   +1 more source

Three-dimensional Lagrangian coherent structures in astrodynamics using differential algebra

open access: yes, 2022
Lagrangian Coherent Structures (LCS) have received attention for profiling dynamical behaviour and identifying separatrices between dynamical features in systems with arbitrary time-dependence.
Wittig, Alexander, Tyler, Jack
core   +1 more source

Home - About - Disclaimer - Privacy