Results 21 to 30 of about 703 (173)
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
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
, 1992 The interplanetary magnetic field (IMF) exerts a strong influence on high latitude F-region convection and, therefore, the IMF is an important input parameter in models of the high latitude ionosphere.
Reinisch, B.W. +2 more
core +4 more sources
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
doaj +1 more source
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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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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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
doaj +1 more source
Gravity wave initiation of equatorial spread F/plasma bubble irregularities based on observational data from the SpreadFEx campaign [PDF]
Annales Geophysicae, 2009 The data from ground based experiments conducted during the 2005 SpreadFEx campaign in Brazil are used, with the help of theoretical model calculations, to investigate the precursor conditions, and especially, the role of gravity waves, in the ...
M. A. Abdu +5 more
doaj +1 more source
GNSS and Digisonde sporadic-E maps produced by Air Force Institute of Technology
, 2022 Spatial maps of sporadic-E are produced by combining COSMIC-2 RO data with Digisonde measurements, using the S4-based approach described by Carmona et al. (2022). Images from the TEC-based approach used in other studies are also included for reference.
Dan Emmons
core +1 more source