Results 11 to 20 of about 2,048,021 (302)

A SYNTHESIS OF TEMPORAL VARIATIONS IN DOPPLER SPECTRA RECORDED AT A QUASI-VERTICAL INCIDENCE BY THE HF DOPPLER RADAR WITH SPACED RECEIVERS [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: The ionospheric channel is widely used for the communication, radio navigation, radar, direction finding, radio astronomy, and remote radio probing systems.
V. F. Pushin, L. F. Chernogor
doaj   +1 more source

First Observations of Mars Atmosphere and Ionosphere with Tianwen-1 Radio-Occultation Technique on 5 August 2021

Remote Sensing, 2022
The radio-occultation technique can provide vertical profiles of planetary ionospheric and atmospheric parameters, which merit the planetary-climate and space-weather scientific research so far.
Xiong Hu, Xiaocheng Wu, Shuli Song, Maoli Ma, Weili Zhou, Qingchen Xu, Lei Li, Cunying Xiao, Xie Li, Chi Wang, Qinghui Liu, Lue Chen, Guangming Chen, Jianfeng Cao, Mei Wang, Peijia Li, Zhanghu Chu, Bo Xia, Junfeng Yang, Cui Tu, Dan Liu, Simin Zhang, Quan Zhang, Zheng Li   +23 more
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Electron density profile modeling

Annals of Geophysics, 1996
The Base Point Model (BPM) is used to model the electron density (N) profile in the ionosphere, This model assumes two Chapman profile expressions one for the bottomside and one for the topside, and requires a characteristic point called "F region base ...
T. Heredia, M. Mosert de Gonzalez, R. G. Ezquer   +2 more
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Seismo-Ionospheric Effects Prior to Two Earthquakes in Taiwan Detected by the China Seismo-Electromagnetic Satellite

Atmosphere, 2022
In this paper, we focused on the characteristics of the seismo-ionospheric effects related to two successive earthquakes, namely, the earthquakes in 2022 in Taitung Sea, Taiwan, China, with magnitudes (M) of 6.7 and 6.3, at 23.45° N, 121.55° E and 23.39°
Yufan Guo, Xuemin Zhang, Jiang Liu, Muping Yang, Xing Yang, Xiaohui Du, Jian Lü, Jian Xiao   +7 more
doaj   +1 more source

Modeling the Plasma Frequency for F2-Region Using Modified Chapman Function and NeQuick2 Model over Different Geographical Locations and Months [PDF]

Engineering and Technology Journal, 2019
This study aims to modeling the plasma frequency profile of the F2 region as a function of geographical location and month of the y ear. The most important model and function used are Chapman function and NeQuick 2 model which have been defined both by ...
Ali Nima
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Modelling of the Electron Density and Total Electron Content in the Quiet and Solar X-ray Flare Perturbed Ionospheric D-Region Based on Remote Sensing by VLF/LF Signals

Remote Sensing, 2021
Many analyses of the perturbed ionospheric D-region and its influence on the propagation of ground-based and satellite signals are based on data obtained in ionospheric remote sensing by very low/low frequency (VLF/LF) signals.
Aleksandra Nina
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The Correlation between Ionospheric Electron Density Variations Derived from Swarm Satellite Observations and Seismic Activity at the Australian–Pacific Tectonic Plate Boundary

Remote Sensing, 2023
Swarm electron density (Ne) observations from the Langmuir probe (LP) can detect ionospheric disturbances at the altitude of a satellite. Along-track satellite observations provide a large number of very short observations of different places in the ...
Wojciech Jarmołowski, Paweł Wielgosz, Manuel Hernández-Pajares, Heng Yang, Beata Milanowska, Anna Krypiak-Gregorczyk, Enric Monte-Moreno, Alberto García-Rigo, Victoria Graffigna, Roger Haagmans   +9 more
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Extending Libraries of Extremely Localized Molecular Orbitals to Metal Organic Frameworks: A Preliminary Investigation

Crystals, 2021
Libraries of extremely localized molecular orbitals (ELMOs) have been recently assembled to reconstruct approximate wavefunctions of very large biological systems, such as polypeptides and proteins.
Erna K. Wieduwilt, Giovanni Macetti, Rebecca Scatena, Piero Macchi, Alessandro Genoni   +4 more
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Electron Density Distribution in Organometallic Materials

CHIMIA, 2009
The electron density distribution is a fundamental property that provides information on the way in which atoms are held together to form molecules, polymers or supramolecular aggregates.
Piero Macchi
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The electron density distribution in CN−, LiCN and LiNC. The use of minimal and extended basis set SCF calculations [PDF]

, 1977
Electron density maps are reported for the CN−ion and the LiCN and LiNC molecules, calculated from molecular wave-functions near the Hartree-Fock limit. The electron density distribution derived from CNDO/ 2 wavefunctions does not resemble the ab initio ...
Bats, J.W., Feil, D.
core   +2 more sources