The phase speed of artificial field-aligned irregularities observed by CUTLASS during HF modification of the auroral ionosphere

Details The phase speed of artificial field-aligned irregularities observed by CUTLASS during HF modification of the auroral ionosphere The phase speed of artificial field-aligned irregularities observed by CUTLASS during HF modification of the auroral ionosphere

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...103.2253e&link_type=abstract

Journal of Geophysical Research, Volume 103, Issue A2, p. 2253-2260

Physics

Plasma Physics

19

Ionosphere: Plasma Convection, Ionosphere: Wave Propagation, Ionosphere: Instruments And Techniques, Space Plasma Physics: Active Perturbation Experiments

Scientific paper

The RF heater facility at Ramfjordmoen, Tromsø can generate field-aligned plasma irregularities in the field of view of the Cooperative UK Twin-Located Auroral Sounding System (CUTLASS) coherent backscatter radar at Hankasalmi, Finland. In a recent set of experiments conducted in April 1996, the phase speed of the generated plasma irregularities has been compared with independent measurements of the plasma drift velocity observed by the European Incoherent Scatter radar facility. The phase speed of the plasma irregularities is found to be equal to the component of the plasma drift velocity in the direction of propagation of the plasma wave. This result is a further verification of the high performance of the CUTLASS radar and also demonstrates how artificially generated plasma irregularities can be employed to detect small plasma drift velocities and contribute to geophysical research. The characteristics of the Doppler spectrum of the artificial plasma waves are also described and discussed.

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