Results 11 to 20 of about 1,552 (215)
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
Remote Sensing, 2022 By using fast ionogram observations, we report the first simultaneous observations of ascending ion layers at equatorial and low latitudes. The ionosonde measurements at Sanya (18.3°N, 109.6°E; dip lat. 12.2°N) and Chumphon (10.7°N, 99.4°E; dip lat.
Lianhuan Hu +10 more
doaj +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
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The effect of collisions in ionogram inversion [PDF]
Advances in Space Research, 2013 14 pages, 4 ...
Scotto, Carlo, Settimi, Alessandro
openaire +3 more sources
Can the polarization tagging of the ionogram trace deceive autoscaling methods? The Learmonth case
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 +4 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
Algorithm for high quality ionograms [PDF]
Electronics Letters, 2000 A new ionogram algorithm, which is highly successful in generating robust and sharp digital ionograms free of artefacts and processing noise, is presented. An important feature of the algorithm is the distortionless zooming capability, which allows the user to concentrate only on the desired magnetoionic components of the ionogram.
Arikan F., Salous, S., Arikan, O.
openaire +3 more sources
Clinical Presentation and Treatment of Hyperemesis Gravidarum in a Lady Carrying Twins in the First Trimester: A Case Reports. [PDF]
Clin Case RepABSTRACT We report a 12‐week‐old pauci‐geste carrying twins who experienced potentially fatal hyperemesis gravidarum. Clinical and paraclinical investigations revealed severe hypovolemic shock/dehydration, ionic disruption, undernutrition, and acute renal failure (GFR: 36.8 mL/min/1.73 m2 according to modified MDRD). The patient spent almost 3 weeks in
Banyanga David K +10 more
europepmc +2 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