Results 71 to 80 of about 114,060 (217)
Earth, Planets and Space, 2022 The occurrence characteristics of 150-km echoes in low-latitude regions are studied using the Equatorial Atmosphere Radar (EAR) in Indonesia. The long-term observation of the 150-km echoes by the EAR enables us to study the occurrence characteristics of ...
Tatsuhiro Yokoyama +2 more
doaj +1 more source
Space Weather, Volume 24, Issue 9, September 2026.Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh +7 more
wiley +1 more source
Appraisal of electromagnetic induction effects on magnetic pulsation studies [PDF]
Annales Geophysicae, 2001 The quantification of wave polarization characteristics of ULF waves from the geomagnetic field variations is done under ‘a priori’ assumption that fields of internal induced currents are in-phase with the external inducing fields.
B. R. Arora +5 more
doaj +1 more source
An equatorial ionospheric current system.
Journal of geomagnetism and geoelectricity, 1985 From the analysis of the external components of the equinoctial geomagnetic daily variation in Peru it follows that they are generated by a complex current system. In this work it is found that in addition to the global current system and the main electrojet, with I0=0.124Amp/m, it is necessary to include two secondary lateral currents parallel to the ...
ROMANELLI, L., HIRSCH, F. A.
openaire +2 more sources
Global Circulation of Martian Ionospheric Currents Revealed by Magnetometer Data
AGU Advances, Volume 7, Issue 6, September 2026.Abstract In the dynamo region of the Martian ionosphere, a large‐scale current is generated by charge separation: ions collide with neutrals while electrons preferentially gyrate around local magnetic field lines. Using MAVEN magnetometer data and a physics‐informed neural network constrained by Ampère's law and Gauss's law for magnetism (the Neural ...
T. Delcourt, A. Mittelholz
wiley +1 more source
Biases and Uncertainties in Radiosonde‐Based Precipitable Water Vapor
Earth and Space Science, Volume 13, Issue 9, September 2026.Abstract Precipitable water vapor (PWV) plays an important role in weather and climate phenomena. Accurate PWV measurements based on radiosonde observations are essential for assessing remote‐sensing measurements and long‐term trends. This study examines the performance of PWV algorithms, including their intrinsic biases and their sensitivity to ...
António P. Ferreira +2 more
wiley +1 more source
Earth and Space Science, Volume 13, Issue 9, September 2026.Abstract Numerical modeling has been a key component in the study of the Mars space environment, providing a comprehensive global representation that is not always easy to obtain in spacecraft measurements. However, there are inconsistencies in data‐model and model‐model comparisons, regardless of whether the simulation conditions are identical or ...
Nii‐Boi A. Quartey +3 more
wiley +1 more source
Earth and Space Science, Volume 13, Issue 9, September 2026.Abstract In situ observations of thermospheric composition have long been scarce, limiting our understanding of the upper atmosphere and its response to space weather. This study focuses on the Neutral Gas Mass Spectrometer (NGMS) onboard the TM19 and TM20 satellites of China's TianMu‐1 constellation, presenting the first systematic elaboration of its ...
Jiangzhao Ai +11 more
wiley +1 more source
Quasi 6‐Day Wave Variability in the Thermosphere and Ionosphere: Observations and Modeling
Earth and Space Science, Volume 13, Issue 9, September 2026.Abstract Satellite observations of the upper mesosphere and lower thermosphere from TIMED‐SABER and ICON‐MIGHTI reveal a clear Quasi 6‐Day Wave (Q6DW) event in the winds and temperatures in this region. This Q6DW event persists across multiple data sets throughout the middle‐to‐upper thermosphere and the F‐region ionosphere, including GOLD disk ...
Oluwafisayo P. Owolabi +2 more
wiley +1 more source
Solar-Terrestrial Physics, 2016 We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity.
Kotova D.S. +5 more
doaj +1 more source