Results 81 to 90 of about 194,727 (195)

The Possible Role of Penning Ionization Processes in Planetary Atmospheres

Atmosphere, 2015
In this paper we suggest Penning ionization as an important route of formation for ionic species in upper planetary atmospheres. Our goal is to provide relevant tools to researchers working on kinetic models of atmospheric interest, in order to include ...
Stefano Falcinelli, Fernando Pirani, Franco Vecchiocattivi   +2 more
doaj   +1 more source

Collisionless Shocks: Contemporary State After Three Quarters of a Century of Research

Reviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract The collisionless shock research started in the late 1950s. Since then, plenty of data have been accumulated due to the large number of missions in the heliosphere, providing in situ measurements of the fields and particles. The quality of these measurements has vastly improved, especially in the last two decades.
M. Gedalin, M. Balikhin, V. Krasnoselskikh   +2 more
wiley   +1 more source

Comparative ionospheres: terrestrial and giant planets [PDF]

, 2017
The study of planetary ionospheres within our solar system offers a variety of settings to probe mechanisms of photo-ionization, chemical loss, and plasma transport.
Luke Moore, Moore, Luke, Jeffrey Trovato, Michael Mendillo, Mendillo, Michael, Trovato, Jeffrey, Ingo Müller-Wodarg, Mueller-Wodarg, Ingo   +7 more
core   +1 more source

Multiple satellite observations of oceanic planetary waves: techniques and findings [PDF]

, 2003
Recent satellite-based observations of oceanic planetary waves have improved our knowledge of the wave properties and lead to advancements in the theory.
Cipollini, Paolo
core   +1 more source

The Impacts of Tropospheric Gravity Wave‐Generated MSTIDs on Skywaves at Mid‐latitude North American Sector Observed and Modeled Using SuperDARN HF Radars

Radio Science, Volume 61, Issue 9, September 2026.
Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty, P. A. Inchin, S. Debchoudhury, B. Bergsson, M. Zettergren, J. M. Ruohoniemi   +5 more
wiley   +1 more source

A Direct Simulation Monte Carlo–Driven Photochemical Model of Callisto’s Ionosphere

The Planetary Science Journal
Here we present a photochemical model of Callisto’s ionosphere with inputs supplied by a direct simulation Monte Carlo model of its neutral atmosphere. We compare a model that considers interactions with photons as the sole external ionization mechanism ...
Shane R. Carberry Mogan, Luke E. Moore, Lucas Liuzzo, Andrew R. Poppe   +3 more
doaj   +1 more source

Obtaining Local‐Tie Vectors From Short‐Baseline Interferometry Between Legacy S/X and VGOS Telescopes at Ny‐Ålesund

Radio Science, Volume 61, Issue 9, September 2026.
Abstract With the ongoing transition for geodetic Very Long Baseline Interferometry (VLBI) from the use of legacy S/X telescopes to the VLBI Global Observing System (VGOS), it is necessary to connect the new VGOS network to the existing legacy S/X telescopes.
Rebekka Handirk, Eskil Varenius, Tobias Nilsson, Karine Le Bail, Rubén Bolaño González, Susana Garcia‐Espada, Axel Meldahl, Thomas Gasmoe, Silje Agnes Grøslie Wennesland, Oddvar Bråvold Tangen, Halfdan Pascal Kierulf   +10 more
wiley   +1 more source

Growth and Damping of Oxygen Ion Cyclotron Harmonics in the Plasma Regions of Venus

The Astrophysical Journal
As altitude decreases in the Venusian plasma environment, the plasma density increases sharply, the magnetic field strength changes, ion temperatures decrease, and the number density of heavier ions increases.
Amrutha, S. V. Singh, K. C. Barik, G. S. Lakhina   +3 more
doaj   +1 more source

Ionospheric Ambipolar Electric Fields of Mars and Venus: Comparisons Between Theoretical Predictions and Direct Observations of the Electric Potential Drop

Geophysical Research Letters, 2019
We test the hypothesis that their dominant driver of a planetary ambipolar electric field is the ionospheric electron pressure gradient (∇Pe). The ionospheres of Venus and Mars are mapped using Langmuir probe measurements from NASA's Pioneer Venus ...
Glyn Collinson, Alex Glocer, Shaosui Xu, David Mitchell, Rudy A Frahm, Joseph Grebowsky, Laila Andersson, Bruce Jakosky   +7 more
doaj   +1 more source

Arbitrary amplitude ion-acoustic solitary and shock waves in an unmagnetized electron–proton–ion nonthermal plasma [PDF]

AIP Advances
This study thoroughly examines the features of arbitrary amplitude ion-acoustic nonlinear structures, including both solitary and shock waves (double layers), in an unmagnetized electron–proton–ion plasma where electrons follow Cairns distributions and ...
Weaam Alhejaili, Muhammad Khalid, Sahibzada I. H. Bacha, Alim Alim, Samir A. El-Tantawy   +4 more
doaj   +1 more source