Results 21 to 30 of about 5,479 (219)

Ionospheric response to the 2009 sudden stratospheric warming over the equatorial, low, and middle latitudes in the South American sector [PDF]

, 2015
The present study investigates the ionospheric total electron content (TEC) and F-layer response in the Southern Hemisphere equatorial, low, and middle latitudes due to major sudden stratospheric warming (SSW) event, which took place during January ...
Coster, A. J., De Abreu, A. J., De Jesus, R., Fagundes, P. R., Gende, Mauricio Alfredo, Goncharenko, L. P., Pezzopane, M., Pillat, V. G., Venkatesh, K.   +8 more
core   +2 more sources

Long-distance HF radio waves propagation during the April 2023 geomagnetic storm by measurements in Antarctica, in Europe, and aboard RV Noosfera

Український антарктичний журнал, 2023
The paper aims at an experimental study of the mechanisms of long-distance high-frequency (HF) propagation and spatial and temporal variations of the ionospheric parameters during the first hours of a severe geomagnetic storm of April 23, 2023 by ...
A. Zalizovski, Y. Yampolski, I. Stanislawska, O. Koloskov, O. Budanov, O. Bogomaz, B. Gavrylyuk, A. Sopin, A. Reznychenko, A. Kashcheyev, S. Kashcheyev, V. Lisachenko   +11 more
doaj   +1 more source

Thermospheric Parameters during Ionospheric G-Conditions

Remote Sensing, 2021
For the first time thermospheric parameters (neutral composition, exospheric temperature and vertical plasma drift related to thermospheric winds) have been inferred for ionospheric G-conditions observed with Millstone Hill ISR on 11–13 September 2005 ...
Loredana Perrone, Andrey V. Mikhailov, Dario Sabbagh   +2 more
doaj   +1 more source

Critical issues in ionospheric data quality and implications for scientific studies [PDF]

, 2019
Ionospheric data are valuable records of the behavior of the ionosphere, solar activity, and the entire Sun-Earth system. The data are critical for both societally important services and scientific investigations of upper atmospheric variability.
Araujo-Pradere, E., Bilitza, D., Dandenault, P. B., Hernández Pajares, Manuel, Weatherhead, E. C., Wilkinson, P.   +5 more
core   +2 more sources

Ionospheric Density Irregularities, Turbulence, and Wave Disturbances During the Total Solar Eclipse Over North America on 21 August 2017

Geophysical Research Letters, 2018
Data from ionosonde and global positioning system (GPS) total electron content (TEC) observations reveal a number of ionospheric phenomena during the total solar eclipse on 21 August 2017 over North America. The eclipse started over the West Coast at ∼16:
Rezy Pradipta, Endawoke Yizengaw, Patricia Doherty   +2 more
doaj   +1 more source

The Validation of FORMOSAT-3/COSMIC Measurements in the Middle Latitude Region of China with Ionosonde Observations during 2015–2018

Universe, 2022
We used ground-based ionosonde observations at Ganzi (31.2° N, 100.4° E) to validate the COSMIC measurement in the middle latitude region of China during low solar activity.
Liangchen Hu, Fanfan Su, Fuying Zhu, Xinxing Li   +3 more
doaj   +1 more source

Experimental Observation and Analysis of Ionosphere Echoes in the Mid-Latitude Region of China Using High-Frequency Surface Wave Radar and Ionosonde

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Ionospheric clutter is a major factor affecting the performance of high-frequency surface wave radar (HFSWR). Previous studies have been mainly focused on the development of ionospheric clutter suppression methods involving delicate signal processing ...
Xuguang Yang, Mingjie Wang, Weimin Huang, Changjun Yu   +3 more
doaj   +1 more source

A Comparative Study on Radio Frequency Interference Suppression and foF2 Scaling for Ionograms

Remote Sensing, 2023
In this paper, we compare the performances of radio frequency interference (RFI) suppression between radio frequency interference mitigation (RFIM) and frequency-domain adaptive clutter suppression (FACS) algorithms that apply to ionograms for foF2 ...
Zhao-Yu Chen, Kai-Jun Ke, Ching-Lun Su, Hung-Shi Lin, Yu-Lei Lai, Yen Lin, Yen-Hsyang Chu   +6 more
doaj   +1 more source

Ionospheric Corrections via PIM and Real-Time Data [PDF]

, 1999
We describe a method for removing ionospheric effects from single-frequency radio data a posteriori. This method is based on a theoretical climatological model developed by the USAF, which returns electron density as a function of position and time along
Campbell, R. M.
core   +3 more sources

Elderly care monitoring system with IoT application [PDF]

, 2020
Falls among elderly can pose serious consequences such as injury or even fatal ones. Therefore, it is essential that fall are detected early and away to that is by using IoT platform.
Abd Wahab, Mohd Helmy, Abdul Jamil, Muhammad Mahadi, Ambar, Radzi, Bong, Jia Cheng   +3 more
core   +1 more source