Investigation of incoherent scatter radar spectra features with stimulated electromagnetic emissions at EISCAT

Mahmoudian, A. and Senior, A. and Kosch, M. and Scales, W.A. and Rietveld, M.T. and Isham, B. and Shi, X. and Ruohoniemi, M. (2019) Investigation of incoherent scatter radar spectra features with stimulated electromagnetic emissions at EISCAT. Advances in Space Research, 64 (1). pp. 159-170. ISSN 0273-1177

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Electromagnetic (EM) and electrostatic (ES) emissions can be generated in the ionosphere by high-power high-frequency (HF) radio waves transmitted from the ground. The signatures of the EM emissions observed on the ground are known as Stimulated Electromagnetic Emissions (SEE) and can be employed for remote measurement of ionospheric parameters. The experimental data from recent HF heating experiments near the fourth electron gyro-frequency (4f ce ) at EISCAT are presented. This paper compares the temporal behavior of SEE within a few Hertz up to 50 kHz of the transmission frequency to the time evolution of enhanced ion line (EHIL) in the incoherent scatter radar (ISR) spectrum. The correlation of Wideband SEE (WSEE) spectral lines within 1 kHz to 100 kHz such as the downshifted maximum (DM), downshifted peak (DP), and broad upshifted maximum (BUM), with HF enhanced ion lines (EHIL) is shown. It is shown that WSEE spectral lines can be used to reproduce the EHIL characteristics including altitude range, rise and decay time, maximum and minimum amplitude. A data reduction technique is developed to derive ionospheric parameters such as the electron density profile near the interaction altitude, magnetic field strength B 0 as well as the altitude profile of the EHIL using the temporal evolution of WSEE spectral lines near nf ce . © 2019 COSPAR

Item Type:
Journal Article
Journal or Publication Title:
Advances in Space Research
Additional Information:
This is the author’s version of a work that was accepted for publication in Advances in Space Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Advances in Space Research, 64, 1, 2019 DOI: 10.1016/j.asr.2019.03.028
Uncontrolled Keywords:
?? electromagnetic dispersionionospherespectroscopystimulated emissionwater vaporbroad up-shifted maximumelectron density profileselectron gyro frequencyhigh power-high frequencyincoherent scatter radarmagnetic field strengthsstimulated electromagnetic emiss ??
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22 Jun 2019 09:07
Last Modified:
31 Jan 2024 00:32