Results 181 to 190 of about 2,902 (228)
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The universal digital ionosonde
Radio Science, 1978The digital ionospheric sounding system Digisonde 128PS explores ionospheric structure and dynamics by exploiting all observables of the reflected electromagnetic wave: range, amplitude, phase, Doppler, incidence angle, and wave polarization. The Digisonde operates in two complementary modes of observation: the Ionogram Mode with full range and ...
Klaus Bibl, Bodo W. Reinisch
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Journal of Atmospheric and Solar-Terrestrial Physics, 1999
Abstract Connecting ionosondes to the Internet gives easy access to real-time information on ionospheric conditions. Some of the ionosonde sites provide just the ionogram displays, others give in addition the scaled ionospheric characteristics directly usable for frequency management and HF channel assessment.
Ivan A Galkin +3 more
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Abstract Connecting ionosondes to the Internet gives easy access to real-time information on ionospheric conditions. Some of the ionosonde sites provide just the ionogram displays, others give in addition the scaled ionospheric characteristics directly usable for frequency management and HF channel assessment.
Ivan A Galkin +3 more
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Design and application of the digital multifunctional ionosonde
IET Radar, Sonar and Navigation, 2016 A multifunctional ionosonde was designed for ionospheric scientific research and monitoring applications by the Ionospheric Laboratory of Wuhan University during 2012–2014. This ionosonde is a high‐frequency (HF) radar using inter‐pulse phase codes and linear frequency modulation with high sensitivity.
Xiao Cui
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Power Amplifier For Short-Pulse Ionosonde
2019 Russian Open Conference on Radio Wave Propagation (RWP), 2019© 2019 IEEE. Vertical sounding is a fairly informative method for studying the ionosphere at a relatively small transmitted power. Ones of the incompletely studied phenomena in the F layer are travelling ionospheric disturbances (TIDs). Especially poorly studied is their mid-latitude and medium-scale variety, or MSTIDs, which needs more frequent ...
Safiullin A., Akchurin A., Khasanov D.
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A Novel Radar Waveform for Monostatic Ionosonde
IEEE Geoscience and Remote Sensing Letters, 2011Monostatic radar, whether using interpulse or intrapulse coded pulse trains, will suffer from the blind zones caused by eclipsing. This letter proposes a novel biphase interpulse coded radar waveform using diverse Pulse Repetition Intervals (PRIs) instead of a consistent PRI within each coherent processing interval (CPI). This waveform can achieve long
Ming Yao 0001 +10 more
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Special facilities of chirp ionosonde
2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems, 2009In this work describe some new functional possibilities of chirp ionosonde in addition to building of oblique sounding ionograms. It is separation of signal and noise on output of receiver, detection of spectrum concentrate disturbance, rejection of spectrum concentrate disturbances and cleaning ionograms from strange signals, measuring characteristics
V.V. Shumaev, A.A. Kolchev, D.G. Shpak
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Autoscala: an aid for different ionosondes
Acta Geophysica, 2009Autoscala is a software to automatically scale ionospheric characteristics from an ionogram. Initially it was only applied to the ionograms recorded by the AIS-INGV ionosondes installed at Rome and Gibilmanna (Italy), and Tucuman (Argentina), that are not able to record the polarization of the received echo.
Michael Pezzopane +3 more
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Digitizing the conventional ionosonde
Radio Science, 1979This paper discusses the accuracy limitations of the conventional ionosonde and techniques which may be used to improve it and at the same time reduce analysis effort. Add‐on digital equipment is described which may easily be attached to any ionosonde to improve its performance at a low cost.
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The applicability of advanced ionosondes to the IRI
Advances in Space Research, 2003Abstract The ionosonde has evolved from the early analog film-recording depictor of the ionosphere, into a precision diagnositic instrument. Contemporary monitoring ionosondes occupy an intermediate niche in this evolution. Some of these present digital ionogram images to interpretation experts who use the conveniences of digital data presentation to
J.W. Wright, T.W. Bullett
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Ionosonde observations of pulsating auroras
Canadian Journal of Physics, 1981An "Australian" type ionosonde with modifications to record virtual height versus time in addition to regular ionograms was used for 23 nights during the "pulsating aurora campaign". Height variations associated with pulsating auroras were noted on 14 nights.
J. W. MacDougall +3 more
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