Results 41 to 50 of about 12,904 (207)

Premature Reentry of the Binar CubeSats Due To Underestimation of Solar and Geomagnetic Activities and Its Implication for Importance of Medium‐ and Long‐Term Space Weather Forecasts

Space Weather, Volume 23, Issue 12, December 2025.
Abstract The rapid development of low‐Earth orbit (LEO) satellites brings increased attention to spacecraft collisions, space debris, orbital decay, and satellite reentry. Neutral density and associated drag force on the satellite orbits elevate space risks, significantly determined by space weather disturbances, particularly geomagnetic storms.
Xin Wang, Ronglan Wang, Kunpeng Wang, Zhitao Yang, Tingling Ren, Jifeng Cao, Ming Li, Siqing Liu, Bingxian Luo, Chi Wang   +9 more
wiley   +1 more source

Constraining the Mass of the Graviton with the Planetary Ephemeris INPOP. [PDF]

Physical Review Letters, 2019
We use the planetary ephemeris INPOP17b to constrain the existence of a Yukawa suppression to the Newtonian potential, generically associated with the graviton's mass.
L. Bernus, O. Minazzoli, A. Fienga, M. Gastineau, J. Laskar, P. Deram   +5 more
semanticscholar   +1 more source

The Impact of the 2024 Mother's Day Storm on Aircraft Surveillance Across Europe

Space Weather, Volume 23, Issue 12, December 2025.
Abstract The Mother's day storm from 10–13 May 2024 is one of the most extreme space weather events recorded in recent decades and triggered a strong ionospheric response with various impacts on communication and navigation systems. In this study the impact on the aviation sector, and more specifically air traffic management, is investigated with ...
Erik Schmölter, Jens Berdermann
wiley   +1 more source

Ephemeris Errors and the Gravitational-wave Signal: Harmonic Mode Coupling in Pulsar Timing Array Searches [PDF]

Astrophysical Journal, 2019
Any unambiguous detection of a stochastic gravitational wave background (GWB) by a pulsar timing array will rest on the measurement of a characteristic angular correlation between pulsars.
E. Roebber
semanticscholar   +1 more source

Magnetopause Reconnection Voltages During the Voyager 2 Flyby of Uranus

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Uranus' magnetosphere presents a unique system to examine global magnetic reconnection processes due to its location far from the Sun. We assess reconnection effectiveness during Voyager 2's Uranus flyby, using a physics‐based analytical model to calculate reconnection voltages applied to the magnetopause.
S. Zomerdijk‐Russell, J. M. Jasinski
wiley   +1 more source

Comprehensive Comparisons of Satellite Data, Signals, and Measurements between the BeiDou Navigation Satellite System and the Global Positioning System

Sensors, 2016
The Chinese BeiDou navigation satellite system (BDS) aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS) is proposed to provide navigation service with more stringent requirements.
Shau-Shiun Jan, An-Lin Tao
doaj   +1 more source

North‐South Shear Along the West‐Lut Fault, Iran, Imaged From Burst Overlap InSAR

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 11, November 2025.
Abstract High‐resolution geodetic measurements of crustal deformation from InSAR provide crucial constraints on a region's tectonics, geodynamics, and seismic hazard. However, space‐based InSAR usually only provides good constraints on horizontal displacement in the east‐west direction, with the north‐south component typically provided by low ...
Pawan Piromthong, Andrew Hooper, John R. Elliott   +2 more
wiley   +1 more source

Real-Time Precise Orbit Determination of Low Earth Orbit Satellites Based on GPS and BDS-3 PPP B2b Service

Remote Sensing
This study investigates and verifies the feasibility of the precise point positioning (PPP)-B2b enhanced real-time (RT) precise orbit determination (POD) of low Earth orbit (LEO) satellites.
Yali Shi, Tianhe Xu, Min Li, Kai Wei, Shuai Wang, Dixing Wang   +5 more
doaj   +1 more source

First Detection of [SI] in Near‐IR JWST Observations of Io in Eclipse, and Comparison With SO Emissions, Evolving Volcanic Eruptions, and Prior UV HST‐STIS [SI] Emissions

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract We observed Io with the James Webb Space Telescope (JWST) NIRSpec/Integral Field Unit (1.0–5.3 μm, R∼2700 $R\sim 2700$) in August 2023 while the satellite was in eclipse. Thermal emission from Kanehekili Fluctus is consistent with the cooling of lava flows after a vigorous eruption in November 2022.
Imke de Pater, Darrell F. Strobel, Ashley Gerard Davies, Joachim Saur, Lorenz Roth, Katherine de Kleer, Emmanuel Lellouch, Zachariah Milby, Carl Schmidt, Thierry Fouchet, Michael H. Wong, Leigh N. Fletcher, Jake Harkett, Michael Roman, Richard J. Cartwright, Jason E. Perry, Julie Renaud‐Kim, Carolyn Jordan, Stephan Schlegel, David A. Williams, David M. Nelson   +20 more
wiley   +1 more source

New constraints on the location of P9 obtained with the INPOP19a planetary ephemeris

Astronomy & Astrophysics, 2020
Context.We used the new released INPOP19a planetary ephemerides benefiting from Jupiter-updated positions by theJunomission and reanalyzedCassiniobservations.Aims.We test possible locations of the unknown planet P9.
A. Fienga, A. Di Ruscio, L. Bernus, P. Deram, D. Durante, J. Laskar, L. Iess   +6 more
semanticscholar   +1 more source