Results 51 to 60 of about 3,476 (226)
TGO Ramfjordmoen Ionosonde Data March 1996
, 2019 About this dataset: This dataset contains ionosonde data in SAO format, and covers data from March 01-31, 1996.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at Ramfjordmoen near Tromsø, Norway ...
Tromsø Geophysical Observatory
core +1 more source
TGO Ramfjordmoen Ionosonde Data September 2022
, 2022 About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from September 01-30, 2022.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core +1 more source
D- and F-Region Ionospheric Response to the Severe Geomagnetic Storm of April 2023
AtmosphereThis study investigates the impact on the Earth’s ionosphere of a severe geomagnetic storm (Dst ∼ −212 nT) that began on 23 April 2023 at around 17:37 UT according to very low-frequency (VLF, 3–30 kHz) or low-frequency (LF, 30–300 kHz) radio signals and ...
Arnab Sen +3 more
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Post‐sunset equatorial plasma bubble (EPB) formation is believe to be influenced by factors including thermospheric neutral winds. This study characterizes pre‐sunset neutral winds observed by ICON on EPB occurrences observed by GOLD over the east Atlantic.
V. J. Adkins +2 more
wiley +1 more source
TGO Ramfjordmoen Ionosonde Data February 1996
, 2019 About this dataset: This dataset contains ionosonde data in SAO format, and covers data from February 01-29, 1996.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at Ramfjordmoen near Tromsø ...
Tromsø Geophysical Observatory
core +1 more source
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract Doppler frequency shifts (DFSs) recorded by continuous wave‐high frequency Doppler sounding systems and ionograms observed by five ionosondes in Taiwan and Japan are used to study three‐dimensionally seismo‐ and tsunami‐traveling ionospheric disturbances (STIDs and TTIDs) triggered by the 29 July 2025 Mw8.8 Kamchatka earthquake.
Yao‐Chun Chen +9 more
wiley +1 more source
HF Heating Effects as Seen From Below and Above: First Results of Joint SURA–Ionosfera‐M Experiment
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract This paper presents the first results of a coordinated experiment on the ionospheric plasma response to high‐frequency (HF) overdense heating, conducted using the SURA heating facility and the Ionosfera‐M satellite. The experiment combined ground‐based observations with in situ satellite measurements, enabling a comprehensive study of ...
A. A. Chernyshov +18 more
wiley +1 more source
TGO Ramfjordmoen Ionosonde Data April 2005
, 2019 About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from April 01-30, 2005.About the Tromsø Ionosonde (1993-present): Since 1980, the ionosonde was situated at 69° 35' N, 19° 13' E at ...
Tromsø Geophysical Observatory
core +1 more source
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
doaj +1 more source
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