Ionospheric Doppler measurements by means of HF-radar techniques
Annals of Geophysics, 2005 Studies of the dynamics of the ionosphere and its related phenomena are mainly based on Doppler Drift measurements. The time variation (ionisation/recombination) of plasma density, thermospheric wind and others can be observed by means of HF-radars.
D. Altadill, C. Bianchi
doaj +1 more source
SPECTRAL ANALYSIS OF REFERENCE SIGNAL AND OF HF SIGNAL REFLECTED FROM THE IONOSPHERE BEATS
Radio Physics and Radio Astronomy, 2014 Topicality of this work is due to the necessity of studying the physical effects associated with the processes in the magnetosphere and the ionosphere. The HF Doppler radar of vertical sounding is used for observations.
V. F. Pushin, L. F. Chernogor
doaj +1 more source
Parameters of traveling ionospheric disturbances: results from spaced oblique HF sounding
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022 Urgency. A characteristic feature of the ionospheric radio channel is that its parameters depend on season, local time, solar activity, geographic coordinates, the state of the sun, the state of atmospheric-space weather, etc. The state of the atmosphere
L. F. Chernogor +6 more
doaj +1 more source
Propagation of gravity waves and spread F in the low-latitude ionosphere over Tucumán, Argentina, by continuous Doppler sounding: first results [PDF]
, 2014 Results of systematic analysis of propagation directions and horizontal velocities of gravity waves (GWs) and spread F structures in low-latitude ionosphere (magnetic inclination ~27°) in Tucumán region, Argentina, are presented.
Baše, J. +12 more
core +2 more sources
Continuous Doppler sounding of the ionosphere during solar flares
Earth, Planets and Space, 2018 Solar flares cause a rapid increase in ionization in the ionosphere owing to significant enhancement of ionizing solar radiation in the X-ray and extreme ultraviolet (EUV) spectral ranges. The change of electron densities in the ionosphere influences the
Jaroslav Chum +8 more
doaj +1 more source
Antarctic Record, 2013 This paper reports simultaneous observations of visible noctilucent clouds (NLC) and polar mesosphere summer echoes (PMSE) at Syowa Station (69°01′S, 38°61′E) in Antarctica. During a 1.5 h interval from 2000 to 2130 UT (2300 to 0030 LT) on Feb. 11, 2009,
Keisuke Hosokawa +5 more
doaj +1 more source
A PORTABLE HF RECEIVING COMPLEX FOR FREGUENCY-AND-ANGULAR SOUNDING OF THE IONOSPHERE
Radio Physics and Radio Astronomy, 2014 The paper presents the functional diagram and principle of operation of a portable HF receiving complex intended for measuring angles of arrival, Doppler frequency shifts and group time delays of probe signals used for remote radio sensing of the ...
V. G. Galushko +4 more
doaj +1 more source
HF radar detection of infrasonic waves generated in the ionosphere by the 28 March 2005 Sumatra earthquake [PDF]
, 2014 International audienceSurface waves generated by earthquakes create atmospheric waves detectable in the ionosphere using radio waves techniques: i.e., HF Doppler sounding, GPS and altimeter TEC measurements, as well as radar measurements.
Bourdillon, Alain +3 more
core +3 more sources
Assessing the quality of ionogram interpretation using the HF Doppler technique [PDF]
, 2007 International audienceThe 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. The measurement of the
Buresova, D. +5 more
core +2 more sources
HF radar observations of high-aspect angle backscatter from the E-region [PDF]
Annales Geophysicae, 2004 We present evidence for the observation of high-aspect angle HF radar backscatter from the auroral electrojets, and describe the spectral characteristics of these echoes. Such backscatter is observed at very near ranges where ionospheric refraction is
S. E. Milan +5 more
doaj +1 more source