Results 51 to 60 of about 788,278 (206)
Space Weather, Volume 24, Issue 11, November 2026.Abstract We present an ensemble of five artificial neural network (ANN) models, extending and upgrading a previous model that reconstructs >30 keV equatorial electron flux measurements from low‐Earth‐orbit (LEO) satellite observations. We use the global coherent nature of the radiation belts to map data collected from the Polar Orbiting Environmental ...
D. L. Stumbaugh, J. Bortnik
wiley +1 more source
A Radio Science Experiment for Dragonfly to Investigate Titan's Rotation and Interior Structure
Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.Abstract NASA's mission Dragonfly to Titan is scheduled for launch in 2028 with arrival in 2034 to study Titan's prebiotic chemistry and habitability. We propose a radio science experiment for Dragonfly, in which radiometric tracking of the rotorcraft from the Deep Space Network, already baselined for communications and navigation, is used as a ...
Flavio Petricca, Dustin Buccino
wiley +1 more source
INPOP17a planetary ephemerides
, 2017 International audienceBased on the use of Cassini radio tracking data and the introduction of LLR data obtained at 1064 nm, a new planetary ephemerides INPOP17a was built including improvements for the planet orbits as well as for Moon ephemerides ...
Viswanathan, V. +7 more
core +1 more source
Quasi‐Homologous Solar Flares and Impacts on Thermospheric Density and Satellite Orbital Drag
Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.Abstract Quasi‐Homologous Flaring (QHF) activity from active regions on the Sun releases intense electromagnetic radiation in recurrent bursts over extended periods. In this letter, we present the effects of recurrent impulsive extreme ultraviolet (EUV) heating on thermospheric neutral density and the resulting atmospheric drag on satellites based on ...
S. Tulasi Ram +8 more
wiley +1 more source
“Alexander’s Ephemerides (117)”
, 2017 This paper offers a commentary on the fragments of so-called Alexander's Diaries (Ephemerides)
Bearzot, Cinzia Susanna
core +1 more source
Remote SensingThe Beidou Global System (BDS-3) innovatively achieves autonomous navigation using inter-satellite links (ISL) across the entire constellation, but it still faces challenges such as the limitations of the prior constraint orbital accuracy and the overall
Wei Xiao +5 more
doaj +1 more source
Orbits of the Asteroids Discovered at the Molėtai Observatory in 2000–2004
Open Astronomy, 2014 The paper presents statistics of the asteroids observed and discovered at the Molėtai Observatory, Lithuania in 2000–2004 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets.
Černis K. +2 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.Abstract In space physics, acronyms for coordinate systems (e.g., GEI, GSM) are commonly used; however, differences in their definitions and implementations can prevent reproducibility. In this work, we compare definitions in online resources, software packages, and frequently cited journal articles and show that implementation differences can lead to ...
R. S. Weigel +8 more
wiley +1 more source
A comparison of GPS broadcast and DMA precise ephemerides [PDF]
, 1994 We compare the broadcast ephemerides from Global Positioning Satellites (GPS) to the postprocessed ephemerides from the Defense Mapping Agency (DMA). We find significant energy in the spectrum of the residuals at 1 cycle/day and higher multiples.
Shattil, Steve +2 more
core
Bayesian test of the strong equivalence principle in Brans-Dicke theories with planetary ephemerides
, 2023 International audienceContext: We are testing strong equivalence principle with planetary ephemerides in the frame of the Brans-Dicke class of scalar tensor theories.
Mariani, Vincenzo +4 more
core +4 more sources