EISCAT observations of large scale electron temperature and electron density perturbations caused by high-power HF radio waves

Details EISCAT observations of large scale electron temperature and electron density perturbations caused by high-power HF radio waves EISCAT observations of large scale electron temperature and electron density perturbations caused by high-power HF radio waves

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54.1555s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, no. 11-12, p. 1555-1572.

Physics

27

Electron Density Profiles, Electron Energy, F Region, Ionospheric Disturbances, Ionospheric Electron Density, Radio Waves, High Frequencies, Ionospheric Heating, Radar Measurement, Wave Propagation

Scientific paper

In this paper, EISCAT observations of the effect of artificial modification on the F-region electron temperature and electron density during several heating experiments at Tromso are reported. During O-mode heating at full power (effective radiated power = 240 MW), the electron temperature is increased by up to 55 percent of its ambient value at altitudes close to the heater interaction height. Measurements of the electron density have revealed both enhancements and depletions in the vicinity of the heater reflection height. These differences are indicative of variations in the balance between the transport and chemical effects. These results are compared with a time dependent numerical model developed from the perturbation equations of Vas'kov and Gurevich (1975). The results of numerical modeling of the electron temperature are in good agreement with the EISCAT observations, whereas there is less good agreement with regard to electron density.

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