Earth, Planets and SpaceAn ionogram image serves as a valuable data for examining the ionospheric bottom side characteristics and variabilities. Spread-F is indicated or identified by plasma irregularity in the ionospheric region.
Phongsachot Benchawattananon +6 more
doaj +2 more sources
When a Bulbar Ulcer Hides a Darker Reality: The Unusual Diagnosis of a Portal Cavernoma in a 69‐Year‐Old Adult [PDF]
Clinical Case Reports, Volume 14, Issue 7, July 2026.ABSTRACT A portal cavernoma is a network formed by localized dilation of the hepatic portal system. This study aims to describe a case of portal cavernoma in a 69‐year‐old adult presenting with gastrointestinal hemorrhage. This is a 69‐year‐old patient with no particular medical history admitted for hematemesis associated with diffuse abdominal pain ...
Martin Wendlassida Nacanabo +13 more
wiley +2 more sources
A new inversion algorithm for backscatter ionogram and its experimental validation [PDF]
Annales Geophysicae, 2014 Oblique backscatter sounding is a powerful tool for detecting and monitoring the ionosphere continuously at a remote distance. High-frequency (HF) backscatter ionograms provide the amplitudes of backscatter signals with respect to group path or time ...
J. J. Zhao +8 more
doaj +3 more sources
Can the polarization tagging of the ionogram trace deceive autoscaling methods? The Learmonth case [PDF]
Annals of Geophysics, 2008 This paper focuses on the problem of invalid O/X polarization tagging of an ionogram and how this can affect ionogram autoscaling methods. To illustrate this problem, 623 ionograms recorded in March and April 2004 (days 080-105) by the digisonde 256
C. Scotto, M. Pezzopane
doaj +3 more sources
Signature of Y-forking in ionogram traces observed at low-mid latitude Indian station, New Delhi, during the earthquake events of 2020: ionosonde observations [PDF]
Frontiers in Astronomy and Space Sciences, 2023 We have examined ionospheric response to eleven earthquake events measuring less than four on the Richter scale during the year 2020 that occurred in the vicinity of New Delhi (28.6°N, 77.2°E, 42.4°N dip).
Arti Bhardwaj +13 more
doaj +2 more sources
A Deep Learning-Enabled Ionogram Dataset for Detection and Classification of Low-latitude Spread-F Phenomena [PDF]
Scientific DataResearch on the ionospheric Spread-F (SF) phenomenon holds significant value in both fields as ionospheric electrodynamic research and enhanced operational applications in radio-based technologies (e.g., communication and navigation).
Pengdong Gao +12 more
doaj +2 more sources
The effect of collisions in ionogram inversion [PDF]
Advances in Space Research, 2013 14 pages, 4 ...
Scotto, Carlo, Settimi, Alessandro
openaire +3 more sources
Prediction Result of Next Monochrome Ionogram frame using LSTM-CNN Model
, 2022 Video of next frame ionogram prediction result using simple LSTM-CNN model Paper published in The 9Th International Seminar on Aerospace Science and Technology ISAST ...
Annis Siradj Mardiani, Varuliantor Dear
core +2 more sources
The Prototype of a Fast Vertical Ionosonde Based on Modern Software-Defined Radio Devices
Remote Sensing, 2022 The description and test results of the prototype of a fast ionosonde for the vertical sounding of the ionosphere, which makes it possible to record ionograms once a second, are presented.
Alexei V. Shindin +5 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2023 The investigation of sporadic E or Es layers typically relies on ground-based or satellite data. This study compares the Es layers recorded in ionograms with those detected using GNSS L1 signal-to-noise ratio data from FORMOSAT-3/COSMIC radio occultation
S. Sobhkhiz-Miandehi +6 more
doaj +1 more source