Results 41 to 50 of about 3,476 (226)
On the Origin of Summer Sporadic E Periodicities at Midlatitudes
Space Weather, Volume 24, Issue 9, September 2026.Abstract Summertime midlatitude sporadic E (Es) layers exhibit daily periodicities whose underlying physical causes remain to be fully identified. We investigate the origin of these periodicities by analyzing an 11‐year data set (2007–2017) comprising ionosonde measurements, FORMOSAT‐3/COSMIC radio occultation (RO) observations, and WACCM‐X neutral ...
Xu Yan +6 more
wiley +1 more source
Annals of Geophysics, 1998 Almost 60 years development of ionosondes and their data processing capabilities are described with emphasis on the authors contributions from the early beginnings of ionospheric studies to the latest digital equipment to be used for the exploration of the magnetosphere.
openaire +4 more sources
TGO Ramfjordmoen Ionosonde Data July 2015
, 2019 About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from July 01-31, 2015.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
Space Weather, Volume 24, Issue 9, September 2026.Abstract Global Ionospheric Specification (GIS) three‐dimensional electron density profiles constructed by assimilating the line‐of‐sight total electron content (TEC) from global navigation satellite system (GNSS) radio occultation (RO) measurements by FORMOSAT‐7/COSMIC‐2 (F7/C2) and ground‐based receiver network from international GNSS service ...
P. K. Rajesh +7 more
wiley +1 more source
TGO Ramfjordmoen Ionosonde Data January 2017
, 2019 About this dataset: This dataset contains ionosonde data in SAO format and ionograms in PNG format, and covers data from January 01-31, 2017.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
GPS Radio Occultation Method for Ionosphere TEC Monitoring [PDF]
فصلنامه علوم و فناوری فضایی, 2013 In this paper GPS radio occultation has been introduced as a way to extract the electron density of the ionosphere. A GPS radio occultation occurs when a receiver on-board a LEO spacecraft tracks a GPS satellite as it sets or rises through the earth’s ...
Sh. Amiri, M. Fahami
doaj
Space Weather, Volume 24, Issue 9, September 2026.Abstract The high‐latitude ionosphere exhibits rapid spatial and temporal variability during geomagnetically active periods, creating persistent challenges for accurate nowcasts. The High‐latitude Workbox for the Ionosphere (HAWK‐I) is a real‐time ionosphere nowcast and specification system designed for operational deployment to address these ...
Patrick Dandenault +7 more
wiley +1 more source
TGO Ramfjordmoen Ionosonde Data February 1998
, 2019 About this dataset: This dataset contains ionosonde data in SAO format, and covers data from February 01-28, 1998.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
Space Weather, Volume 24, Issue 9, September 2026.Abstract Equatorial plasma bubbles (EPBs) are typically nighttime ionospheric irregularities, and their persistence into daytime sectors remains insufficiently understood. Here, we investigate long‐lived EPB‐related plasma depletion structures over the Pacific sector during the recovery phase of the 23–25 April 2023 geomagnetic storm using Formosa ...
Hailun Ye +12 more
wiley +1 more source
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.
Reinisch, B. W. +2 more
openaire +4 more sources