Results 21 to 30 of about 711 (146)
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
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Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2021 Background. Ionospheric effects from solar eclipses (SEs) have been studied for over a century. The studies intensified in the 1960–1970, when rockets, satellites, ionosonde networks, and incoherent scatter radars became actively involved in the ...
L. F. Chernogor +4 more
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On the Upwelling of the F Layer Base and Prediction of Equatorial Plasma Bubble
Geophysical Research Letters, 2023 Prediction of equatorial plasma bubbles (EPBs) continues to be a challenge for the scientific community. We present a novel data analysis approach, employed on the collocated radar and ionosonde observations from Gadanki, providing new experimental ...
A. K. Patra, S. K. Das
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Seasonal Transitions in the Thermosphere Inferred from Ionospheric Observations
Remote Sensing, 2023 Ionospheric observations along with CHAMP/STAR neutral gas density measurements were used to retrieve thermospheric parameters and to check whether the equinox transition season exists separately from the December solstice and June solstice seasons ...
Loredana Perrone, Andrey V. Mikhailov
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Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements [PDF]
Atmospheric Measurement Techniques, 2016 We validate two-dimensional ionospheric tomography reconstructions against EISCAT incoherent scatter radar measurements. Our tomography method is based on Bayesian statistical inversion with prior distribution given by its mean and covariance. We employ
J. Norberg +6 more
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Ionospheric drift measurements with ionosondes
Annals of Geophysics, 1998 In the last forty years many attempts have been made to measure ionospheric plasma motions with HF radio sounders, generally specialized ionosondes. Starting in the 1950's, the so-called similar fading and the correlation methods were applied to estimate the velocities in the ionosphere.
D. L. Haines +2 more
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AtmosphereKnowledge of ionospheric plasma altitudinal distribution is crucial for the effective operation of radio wave propagation, communication, and navigation systems.
Iurii Cherniak +7 more
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New low power pulse compressed ionosonde at Gibilmanna Ionospheric Observatory
Annals of Geophysics, 2005 A digital low power pulse compressed ionosonde was developed at the Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy. The aim of this Advanced Ionospheric Sounder, AIS-INGV, is to reduce the transmitted power and, consequently,
G. Tutone +7 more
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Comparison of Seasonal foEs and fbEs Occurrence Rates Derived from Global Digisonde Measurements
Atmosphere, 2021 A global climatology of sporadic-E occurrence rates (ORs) based on ionosonde measurements is presented for the peak blanketing frequency, fbEs, and the ordinary mode peak frequency of the layer, foEs.
Dawn K. Merriman +3 more
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Multilayered Sporadic‐E Response to the Annular Solar Eclipse on June 21, 2020
Space Weather, 2021 A moon shadow of annular solar eclipse passed through East Asia in the afternoon on June 21, 2020, which was a good opportunity to study the rapid ionospheric response to the solar radiation variations. In the study, the high‐frequency echoes recorded by
Jin Wang +12 more
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