First EISCAT measurement of electron-gas temperature in the artificially heated D-region ionosphere
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In this paper, a combined EISCAT VHF-radar and heating experiment was carried out in November 1998 with the aim to measure the electron temperature increase due to heating.Abstract:
. The ionospheric electron gas can be heated artificially by a powerful radio wave. According to our modeling, the maximum effect of this heating occurs in the D-region where the electron temperature can increase by a factor of ten. Ionospheric plasma parameters such as Ne, Te and Ti are measured by EISCAT incoherent scatter radar on a routine basis. However, in the D-region the incoherent scatter echo is very weak because of the low electron density. Moreover, the incoherent scatter spectrum from the D-region is of Lorentzian shape which gives less information than the spectrum from the E- and F-regions. These make EISCAT measurements in the D-region difficult. A combined EISCAT VHF-radar and heating experiment was carried out in November 1998 with the aim to measure the electron temperature increase due to heating. In the experiment the heater was switched on/off at 5 minute intervals and the integration time of the radar was chosen synchronously with the heating cycle. A systematic difference in the measured autocorrelation functions was found between heated and unheated periods. Key words: Ionosphere (active experiments; plasma temperature and density; wave propagation)read more
Citations
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Journal ArticleDOI
The science case for the EISCAT_3D radar
Ian McCrea,Anita Aikio,Lucilla Alfonsi,Evgenia Belova,Stephan Buchert,Mark A. Clilverd,N. Engler,Björn Gustavsson,C. J. Heinselman,Johan Kero,Michael Kosch,Michael Kosch,Hervé Lamy,Thomas Leyser,Yasunobu Ogawa,Kjellmar Oksavik,Asta Pellinen-Wannberg,Asta Pellinen-Wannberg,F. Pitout,F. Pitout,Markus Rapp,Iwona Stanislawska,Juha Vierinen +22 more
TL;DR: The new radar facility will enable the EISCAT_3D science community to address new, significant science questions as well as to serve society, which is increasingly dependent on space-based technology and issues related to space weather.
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First observations of the PMSE overshoot effect and its use for investigating the conditions in the summer mesosphere
TL;DR: In this article, the EISCAT radars and heating facility looked for a proposed new PMSE overshoot effect resulting when PMSE is being affected by a specific cycling of artificial electron heating.
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Past, Present and Future of Active Radio Frequency Experiments in Space
Anatoly V. Streltsov,Anatoly V. Streltsov,Jean-Jacques Berthelier,Alexander Chernyshov,V. L. Frolov,V. L. Frolov,Farideh Honary,Michael Kosch,Michael Kosch,Michael Kosch,R. P. Mccoy,Evgeny Mishin,Michael T. Rietveld +12 more
TL;DR: This review describes the heating facilities, past and present, and discusses scientific results from these facilities and associated space missions, including important satellite missions which are necessary to answer the outstanding questions in this field.
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KAIRA: The Kilpisjärvi Atmospheric Imaging Receiver Array—System Overview and First Results
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TL;DR: An overview of KAIRA, its principal hardware and software components, and its main science objectives are given and the applicability of the radio astronomy technology to geoscience application is demonstrated.
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Artificial modification of polar mesospheric winter echoes with an RF heater: Do charged dust particles play an active role?
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TL;DR: In this paper, an investigation of polar mesosphere winter echoes (PMWE) has been carried out with the mesosphere-stratosphere-troposphere Mobile Rocket and Radar Observatory (MST MORRO) radar operating at 56 MHz.
References
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Introduction to ionospheric heating at Tromsø—I. Experimental overview
TL;DR: The EISCAT ionospheric modification (heating) facility at Ramfjordmoen will become a part of the IEEE 802.11 association from January 1993 as discussed by the authors.
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Gen-system—a new experimental philosophy for EISCAT radars
TL;DR: GEN-SYSTEM as mentioned in this paper is a code name for a new experimental design philosophy, a set of related correlator algorithms and an experiment library based on this philosophy, designed to obtain an easy way to develop powerful experiments having several different modulations in the same pattern.
Journal ArticleDOI
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TL;DR: Diurnal variations of ionospheric ion/electron temperatures predicted assuming solar UV RADIATION heating, collisional cooling and heat transport by conduction as mentioned in this paper, assuming that the solar UV radiation is absorbed by the ionosphere.