Results 21 to 30 of about 1,219 (180)
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
Remote Sensing, 2023 A growing number of SmallSat/CubeSat constellations with high-rate (50–100 Hz) global navigation satellite system radio occultations (GNSS-RO) as well as low-rate (1 Hz) precise orbit determination (GNSS-POD) limb-viewing capabilities provide ...
Nimalan Swarnalingam +3 more
doaj +1 more source
Searching for effects caused by thunderstorms in midlatitude sporadic E layers [PDF]
, 2017 Possible thunderstorm - sporadic E (Es) layer coupling effects are investigated during two measurement periods, one in 2013 and one in 2014. The analysis was based on ionospheric observations obtained from a Digisonde at Pruhonice, the Czech Republic, an
Barta, Veronika +10 more
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Analysis of GNSS radio occultation data from satellite ZH-01
Earth and Planetary Physics, 2018 The electromagnetic satellite Zhangheng 01 (ZH-01) was successfully launched on February 2, 2018. The GNSS Radio Occultation (GRO) receiver on board the satellite is able to observe the occultation events of GPS and BeiDou navigation satellites.
Yan Cheng +5 more
doaj +1 more source
Investigation of the Topside Ionosphere over Cyprus and Russia Using Swarm Data
Remote Sensing, 2023 Using the topside electron density (Ne) measurements recorded over Cyprus and Russia, we investigate the latitudinal variation in the topside electron density during the interval 2014–2020, encompassing a period of high-to-low solar activity.
Haris Haralambous +3 more
doaj +1 more source
Investigation of the Electron Density Variation During the 21 August 2017 Solar Eclipse
Geophysical Research Letters, 2018 This paper presents a comparison of modeled and measured electron densities for the 21 August 2017 solar eclipse across the USA. The location of the instrument was (43.81°N, 247.32°E) where the maximum obscuration of 99.6% occurred at 17.53 hr UT on 21 ...
B. W. Reinisch +4 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
D. L. Haines +2 more
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Frontiers in Astronomy and Space Sciences, 2023 A multi-instrumental analysis of the meridional ionospheric response is presented over Europe during the two largest ICME-driven geomagnetic storms of solar cycle #24 maximum.
K. A. Berényi +8 more
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Annals of Geophysics, 2005 The Earth's ionosphere largely determines space weather effects on radio wave communications, navigation and surveillance systems. Lately there has been an increasing demand for ionospheric nowcast and accurate forecast services by various ...
A. Belehaki
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Observations of GPS ionospheric scintillations over Wuhan during geomagnetic storms [PDF]
, 2006 International audienceDuring the two geomagnetic storms which occurred on 1 October 2002 and 22 January 2004, the strong ionospheric scintillations of the GPS L1 band were observed at Wuhan station (30.6° N, 114.4° E, 45.8° Dip), which is situated near ...
Li, G., Ning, B., Wan, W., Zhao, B.
core +3 more sources