Results 31 to 40 of about 11,650 (287)
Geophysical 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
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
Stellar Source Selections for Image Validation of Earth Observation Satellite [PDF]
Journal of Astronomy and Space Sciences, 2011 A method of stellar source selection for validating the quality of image is investigated for a low Earth orbit optical remote sensing satellite. Image performance of the optical payload needs to be validated after its launch into orbit.
Jiwoong Yu +4 more
doaj +1 more source
A novel interplanetary communications relay [PDF]
, 2010 A case study of a potential Earth-Mars interplanetary communications relay, designed to ensure continuous communications, is detailed. The relay makes use of orbits based on artificial equilibrium points via the application of continuous low thrust ...
Andersson G. +12 more
core +1 more source
Space Weather, Volume 21, Issue 3, March 2023., 2023 Abstract On 03 February 2022, SpaceX launched 49 Starlink satellites, 38 of which re‐entered the atmosphere on or about 07 February 2022 due to unexpectedly high atmospheric drag. We use empirical model (NRLMSIS, JB08, and HASDM) outputs as well as solar extreme ultraviolet occultation and high‐fidelity accelerometer data to show that thermospheric ...
T. E. Berger +8 more
wiley +1 more source
Balancing Conditions for the Relativistic Correction Using Lorentz Acceleration
International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023 In this work, the average effects of the Lorentz acceleration on the charged spacecraft’s orbit are studied encounter with relativistic correction. The relativistic correction as function of the orbital elements, and may be time, is formulated. Lagrange planetary equations are used to calculate the perturbations due to considered perturbing forces. The
M. A. Yousef +3 more
wiley +1 more source
Element sets for high-order Poincar\'e mapping of perturbed Keplerian motion [PDF]
, 2018 The propagation and Poincar\'e mapping of perturbed Keplerian motion is a key topic in celestial mechanics and astrodynamics, e.g. to study the stability of orbits or design bounded relative trajectories. The high-order transfer map (HOTM) method enables
Armellin, Roberto, Gondelach, David J.
core +2 more sources
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
Solar sail capture trajectories at Mercury [PDF]
, 2002 Mercury is an ideal environment for future planetary exploration by solar sail since it has proved difficult to reach with conventional propulsion and hence remains largely unexplored.
Anselmi A. +13 more
core +1 more source
poliastro: a Python library for interactive astrodynamics
SciPy, 2022 —Space is more popular than ever, with the growing public awareness of interplanetary scientific missions, as well as the increasingly large number of satellite companies planning to deploy satellite constellations.
Juan Rodríguez, Jorge Garrido
semanticscholar +1 more source