First observations of stimulated electromagnetic emission in the ionosphere modified by the spear heating facility on Spitsbergen
| Autor: | Evgeniy Tereshchenko, T. R. Robinson, Tim K. Yeoman, R. Yu. Yurik |
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| Rok vydání: | 2008 |
| Předmět: |
Physics
Nuclear and High Energy Physics Astronomy and Astrophysics Statistical and Nonlinear Physics Plasma Radiation Atmospheric sciences Electronic Optical and Magnetic Materials Computational physics law.invention Critical frequency law Physics::Accelerator Physics Astrophysical plasma Ionospheric heater Electrical and Electronic Engineering Radar Spear Ionosphere |
| Zdroj: | Radiophysics and Quantum Electronics. 51:858-861 |
| ISSN: | 1573-9120 0033-8443 |
| DOI: | 10.1007/s11141-009-9090-6 |
| Popis: | We present the first results of observations of the stimulated electromagnetic emission (SEE) in the ionosphere modified by the Space Plasma Exploration by Active Radar (SPEAR) heating facility. Observation of the SEE is the key method of ground-based diagnostics of the ionospheric plasma disturbances due to high-power HF radiation. The presented results were obtained during the heating campaign performed at the SPEAR facility in February–March 2007. Prominent SEE special features were observed in periods in which the critical frequency of the F 2 layer was higher than the pump-wave frequency (4.45 MHz). As an example, such special features as the downshifted maximum and the broad continuum in the region of negative detunings from the pump-wave frequency are presented. Observations clearly demonstrate that the ionosphere was efficiently excited by the SPEAR heating facility despite the comparatively low pump-wave power. |
| Databáze: | OpenAIRE |
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