Results 71 to 80 of about 2,351 (233)

Impact of Non‐Classical Gravity‐Wave Dynamics on Middle‐Atmosphere Mean Flow and Solar Tides

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.
Abstract Conventional gravity‐wave (GW) parameterizations neglect three aspects of GW dynamics. Instead of momentum and entropy fluxes they use Eliassen‐Palm fluxes, thereby neglecting the possibility that resolved flow are not in geostrophic and hydrostatic balance.
T. Kühner, G. S. Völker, U. Achatz
wiley   +1 more source

Research at the Stanford Center for Radar Astronomy Semiannual status report no. 6, 1 Jul. - 31 Dec. 1965 [PDF]

Radio and radar astronomical studies on lunar and planetary ionospheres and atmospheres, and solar ...
Eshleman, V. R.
core   +1 more source

Frequency‐Dependent Latitudinal Distributions of Plasmaspheric Plume Hiss Directionality and Amplitude

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Plasmaspheric plume hiss plays a crucial role in shaping Earth's electron radiation belts and influencing magnetosphere–ionosphere energy coupling. However, its generation mechanism remains contested between cyclic‐linear and localized‐nonlinear models. By analyzing over 64,000 high‐resolution plume hiss wave segments from the Van Allen Probes
Zhiyong Wu, Zhenpeng Su, Huinan Zheng, Yuming Wang   +3 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

Theoretical studies of important processes in planetary and comet atmospheres. Renewel request [PDF]

Current efforts have focused on the dissociative recombination (DR) of O2(+), a process of great importance in planetary atmospheres. This process is difficult to study experimentally because of the need to determine the dependence of the product ...
Guberman, Steven L.
core   +1 more source

Can the International Reference Ionosphere Model Predict Long‐Term Trends in the Ionosphere?

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The International Reference Ionosphere (IRI) model can partially reproduce ionospheric long‐term trends (LTTs), although not intentionally, provided that an appropriate effective ionospheric index is used. We evaluate how model predictions driven by a solar activity proxy (R12) and by an effective ionospheric proxy (IG12) can reproduce the ...
A. Pignalberi, M. Pietrella, T. Alberti, M. Pezzopane   +3 more
wiley   +1 more source

The Flare Irradiance Spectral Model‐Version 2 (FISM2)

Space Weather, 2020
The Flare Irradiance Spectral Model (FISM) is an important tool for estimating solar variability for a myriad of space weather research studies and applications, and FISM Version 2 (FISM2) recently was released.
P. C. Chamberlin, F. G. Eparvier, V. Knoer, H. Leise, A. Pankratz, M. Snow, B. Templeman, E. M. B. Thiemann, D. L. Woodraska, T. N. Woods   +9 more
doaj   +1 more source

Data catalog series for space science and applications flight missions. Volume 1A: Brief descriptions of planetary and heliocentric spacecraft and investigations [PDF]

Planetary and heliocentric spacecraft, including planetary flybys and probes, are described. Imaging, particles and fields, ultraviolet, infrared, radio science and celestial mechanics, atmospheres, surface chemistry, biology, and polarization are ...
Cameron, W. S., Vostreys, R. W.
core   +1 more source

Relatively Intense Daytime GNSS Amplitude Scintillations at Middle Latitude Linked With Multi‐Layered Strong Es Structures

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Intense Global Navigation Satellite System (GNSS) amplitude scintillations usually occur in nighttime at low latitudes due to ionospheric plasma bubble irregularities. During daytime at middle latitudes, previous studies found that the sporadic E (Es) layer could lead to GNSS amplitude scintillations, which however, is relatively weak, for ...
Wenjie Sun, Yuichi Otsuka, Guozhu Li, Zhe Yang, Yuanfa Ji, Wenbin Liang, Renjin Zhang, Xiukuan Zhao, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Guofeng Dai, Yi Li, Haiyong Xie, Baiqi Ning   +14 more
wiley   +1 more source

Digital Image Compression Using Artificial Neural Networks [PDF]

The problem of storing, transmitting, and manipulating digital images is considered. Because of the file sizes involved, large amounts of digitized image information are becoming common in modern projects.
Aloy, A., Gaitan, V., Garrido, L., Serra-Ricart, M.   +3 more
core   +1 more source