Results 1 to 10 of about 703 (173)
Remote SensingDuring the peak days of the 2019 Leonids and Geminids (16–19 November and 10–16 December), two ionograms/minute and one Skymap/minute campaign measurements were carried out at the Sopron (47.63°N, 16.72°E) and Průhonice (50.00°N, 14.60°E) Digisonde ...
Petra Koucka Knížová +2 more
exaly +7 more sources
Exploring the occurrence rate of PMSE-Es by Digisonde at Tromsø [PDF]
Earth and Planetary Physics, 2021 Polar mesosphere summer echoes (PMSE) are observed simultaneously with Digisonde and EISCAT VHF radar. The phenomenon of irregular Es layers is called PMSE-like or PMSE-Es (Polar Mesosphere Summer Echoes-Es) and has some relationship with real PMSE.
Maoyan Wang, Safi Ullah
exaly +4 more sources
Atmosphere, 2023 In this paper we analyze Digisonde observations obtained in the European region to specify the effects of large-scale travelling ionospheric disturbances (LSTIDs) on the ionospheric characteristics that define the conditions in the bottomside ionosphere.
Konstantinos Tziotziou +2 more
exaly +4 more sources
Comparison of COSMIC measurements with the IRI-2007 model over the eastern Mediterranean region [PDF]
Journal of Advanced Research, 2013 This paper presents a comparison of the International Reference Ionosphere (IRI-2007) model over the eastern Mediterranean region with peak ionospheric characteristics (foF2–hmF2) and electron density profiles measured by FORMOSAT-3/COSMIC satellites in ...
P. Vryonides, H. Haralambous
doaj +2 more sources
Multi-instrumental detection of a fireball during Leonids of 2019
Frontiers in Astronomy and Space Sciences, 2023 During the 2019 Leonid meteor shower, the European Fireball Network recorded a bright fireball (meteor code: EN171119_041459) at 04:15:0.2 (UT) on 17 November 2019.
Cs. Szárnya +7 more
doaj +1 more source
Karl Rawer: space research and international cooperation – Laudation on the occasion of the 100th birthday of Professor Karl Rawer [PDF]
Advances in Radio Science, 2014 This laudation is given in honor of the 100th birthday of Prof. Karl Rawer which happens to coincide with the 45th anniversary of the International Reference Ionosphere (IRI).
B. W. Reinisch
doaj +1 more source
Assessing the quality of ionogram interpretation using the HF Doppler technique [PDF]
Annales Geophysicae, 2007 The first joint common volume measurements by the Digisonde Portable Sounder (DPS-4) and a new Doppler type system has been run at the Pruhonice ionospheric observatory (49.99° N, 14.54° E) since January 2004.
D. Buresova +7 more
doaj +1 more source
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 +1 more source
On the use of high-frequency surface wave oceanographic research radars as bistatic single-frequency oblique ionospheric sounders [PDF]
Atmospheric Measurement Techniques, 2022 We demonstrate that bistatic reception of high-frequency oceanographic radars can be used as single-frequency oblique ionospheric sounders. We develop methods that are agnostic of the software-defined radio system to estimate the group range from the ...
S. R. Kaeppler +5 more
doaj +1 more source
Unusual Enhancements of NmF2 in Anyang Ionosonde Data [PDF]
Journal of Astronomy and Space Sciences, 2013 Sudden enhancements of daytime NmF2 appeared in Anyang ionosonde data during summer seasons in 2006-2007. In order to investigate the causes of this unusual enhancement, we compared Anyang NmF2’s with the total electron contents (GPS TECs) observed at ...
Jongyeon Yun +4 more
doaj +1 more source