Results 61 to 70 of about 1,807 (203)
Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.Abstract Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma through changes in the plasma scale height. Here, we use ionospheric equivalent slab thickness (τ) multidecadal time series, derived through observations from co‐located
A. Pignalberi, T. Alberti
wiley +1 more source
A Software for Automatic Scaling of foF2 and MUF(3000)F2 from Ionograms
, 2002 A software for automatic scaling of critical frequency f0F2 and MUF(3000)F2 is presented. The program is designed to scale the ionograms without using information on polarization and can be applied to both single antenna systems and crossed antenna ...
Scotto, C., Pezzopane, M.
core +1 more source
Earth and Space Science, Volume 13, Issue 8, August 2026.Abstract A set of fresh Equatorial Plasma Bubbles (EPBs) formed during pre‐sunrise hours in the Southeast Asian sector amid the recovery phase of May 2024 geomagnetic storm. They offered new insights into their formation mechanism. This study used Total Electron Content (TEC) and Rate of TEC Index maps over Indonesia, along with ionosondes in Thailand ...
Sri Ekawati +9 more
wiley +1 more source
THE EFFECTS OF SOLAR ECLIPSE OF MARCH 20, 2015 OVER IONOSPHERE OF EUROPE: IONOSONDE OBSERVATIONS
Radio Physics and Radio Astronomy, 2015 The ionograms from eleven European ionosondes (Kharkiv, Moscow, Pruhonice, San Vito, et al.) have been analyzed. These ionograms were obtained during the eclipse of March 20, 2015 and the reference days.
L. F. Chernogor, V. V. Barabash
doaj +1 more source
The Astronomical Journal, 2023 The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board Mars Express has been sampling the topside ionosphere of Mars since mid-2005. The analysis of the main reflection (nadir) of the ionosphere through the ionograms provided by
David Pacios +6 more
doaj +1 more source
Radio Science, Volume 61, Issue 8, August 2026.Abstract This paper explores the impact of natural phenomena on signal data transmission across various ionospheric communication channels. The study focuses on three primary phenomena: meteor trails prevalent in the middle‐ and lower‐latitude ionosphere, bubble and plume structures observed around the equatorial ionosphere, and magnetic‐storm‐induced ...
I. Bronfman +2 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract The auroral‐like sporadic E‐layer is typically observed at altitudes between 100 and 150 km within the South American Magnetic Anomaly region. However, the occurrence of an unusual layer event detected above this altitude range on 18 July 2017 has raised intriguing questions regarding the physical processes responsible for the substantial ...
Lígia A. Da Silva +21 more
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Radio‐Quiet Ionosonde Observations for Monitoring Absorption in the HF Band
Radio Science, Volume 61, Issue 8, August 2026.Abstract This work presents a technique to monitor ionospheric absorption in the HF radio band using ionosondes. For this purpose, the ionosondes were run in a radio‐silent mode, recording not reflections of their own emitted signals but oblique signals from transmitters of opportunity.
T. G. W. Verhulst +5 more
wiley +1 more source
Features of backscatter ionospheric sounding as studied with a chirp ionosonde
Solar-Terrestrial Physics, 2017 We present the results of the studies of backscatter ionospheric sounding (BS) on the basis of a multipurpose chirp ionosonde developed in ISTP SB RAS. We analyze BS experimental data obtained during different seasons from 2005 to 2009.
Ponomarchuk S.N. +2 more
doaj +1 more source
Solar-Terrestrial Physics, 2020 In this paper, we discuss the main types of quasiperiodic variations in amplitudes of a reflected signal during vertical sounding of the ionosphere at middle latitudes.
K.М. Yusupov +7 more
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