Zobrazeno 1 - 10
of 3 641
pro vyhledávání: '"very low frequency"'
Publikováno v:
水下无人系统学报, Vol 32, Iss 5, Pp 855-863 (2024)
Very low frequency(VLF) electromagnetic wave provides a reliable method for cross-medium communication in polar sea environments due to its ability to penetrate seawater. In order to solve the problem of polar VLF electromagnetic wave propagation acr
Externí odkaz:
https://doaj.org/article/bc67f17b0e81413fb3ab03c6ea8a5257
Autor:
Michal HOFFMAN, Eduard KOČI
Publikováno v:
Contributions to Geophysics and Geodesy, Vol 54, Iss 1, Pp 67-84 (2024)
The data from a permanent monitoring station, based on a sound card as an AD/DA converter and a magnetic loop antenna for continuous recording of electromagnetic field intensities in the Very Low Frequency (VLF) range, were recorded and compared with
Externí odkaz:
https://doaj.org/article/93384fa910234dd9a4132261e028c1f9
Autor:
Alejandro Diaz-Sanchez, Gregorio Zamora-Mejia, Jose M. Rocha-Perez, Jose L. Vazquez-Gonzalez, Uriel G. Zapata-Rodriguez
Publikováno v:
IEEE Access, Vol 12, Pp 13586-13600 (2024)
This work presents a reconfigurable-band analog filter capable of performing the low-pass, high-pass, band-pass or all-pass functions. The proposed filter is a simple and compact cell composed of only two RC networks and one differential Operational
Externí odkaz:
https://doaj.org/article/cc6a47e0b6a149b69d27cd14f02709bb
Autor:
Dimitrios Z. Politis, Sudipta Sasmal, Masashi Hayakawa, Haris Haralambous, Abhirup Datta, Stelios M. Potirakis
Publikováno v:
Remote Sensing, Vol 16, Iss 22, p 4162 (2024)
In this study, we present a six-year (2014–2020) statistical analysis of VLF subionospheric propagation data at 19 VLF receivers from the VLF transmitter with call name JJI and frequency 22.2 kHz, all located in Japan. Moderate and strong earthquak
Externí odkaz:
https://doaj.org/article/fe57f91fa3864b679692a76f3e2f8ac8
Autor:
BURLAN-ROTAR, Tudor1 tudor.burlan@yahoo.com, Dumitru, Gabriel1 gmdumitru@yahoo.com, PRELIPCEANU, Alina Ioana1 prelipceanu.alina@yahoo.com
Publikováno v:
Fiability & Durability / Fiabilitate si Durabilitate. 2017, Issue 1, p341-348. 8p.
Autor:
Eröss, Rudolf1, Tezkan, Bülent1 tezkan@geo.uni-koeln.de, Stoll, Johannes B.2, Bergers, Rainer1
Publikováno v:
Journal of Environmental & Engineering Geophysics. Mar2017, Vol. 22 Issue 1, p83-94. 12p.
Autor:
Shiwei Wang, Ruoxian Zhou, Xudong Gu, Wei Xu, Zejun Hu, Binbin Ni, Wen Cheng, Jingyuan Feng, Wenchen Ma, Haotian Xu, Yudi Pan, Bin Li, Fang He, Xiangcai Chen, Hongqiao Hu
Publikováno v:
Remote Sensing, Vol 16, Iss 12, p 2092 (2024)
Measurements of Very-Low-Frequency (VLF) transmitter signals have been widely used to investigate the effects of various space weather events on the D-region ionosphere, including nowcasting solar flares. Previous studies have established a method to
Externí odkaz:
https://doaj.org/article/272298ea9472485fa84ab304b1c36173
Seasonal Variation of the D‐Region Ionosphere: Very Low Frequency (VLF) and Machine Learning Models.
Autor:
Richardson, David K.1 drichardson42@gatech.edu, Cohen, Morris B.1
Publikováno v:
Journal of Geophysical Research. Space Physics. Sep2021, Vol. 126 Issue 9, p1-12. 12p.
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-51 (2023)
Abstract Slow earthquakes are episodic slow fault slips. They form a fundamental component of interplate deformation processes, along with fast, regular earthquakes. Recent seismological and geodetic observations have revealed detailed slow earthquak
Externí odkaz:
https://doaj.org/article/59d7bb4a5c3847b7ad28fb8713f254df
Autor:
Simms, Laura E.1 simmsl@augsburg.edu, Engebretson, Mark J.1, Rodger, Craig J.2, Dimitrakoudis, Stavros3, Mann, Ian. R.3, Chi, Peter J.4
Publikováno v:
Journal of Geophysical Research. Space Physics. May2021, Vol. 126 Issue 5, p1-14. 14p.