Some new diagnostic methods for the active HF heating in the D-region ionosphere

Details Some new diagnostic methods for the active HF heating in the D-region ionosphere Some new diagnostic methods for the active HF heating in the D-region ionosphere

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsa51a..04k&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SA51A-04

Physics

2439 Ionospheric Irregularities, 2451 Particle Acceleration, 2483 Wave/Particle Interactions (7867), 2736 Magnetosphere/Ionosphere Interactions (2431), 2752 Mhd Waves And Instabilities (2149, 6050, 7836)

Scientific paper

According to present models the EISCAT Heater Facility is capable of increasing the electron temperature by a factor of ten in the D-region ionosphere. However, this maximum effect has not been verified by any radar observation yet. This is mostly due to lack of appropriate incoherent scatter data analysis package for the heated D region. Here we introduce a new nonlinear MCMC fitting of the theoretical autocorrelation function to detected lag profiles. This data analysis method is applied for the previous Finnish Eiscat campaign in November 2006, where three dedicated heater and radar experiments were carried out in order to quantify the active heating effect. The standard Eiscat ARC-D program and a newly designed SIPPI experiment, which is based on the direct sampling of the backscattered signal, were used in turns for the VHF radar. All the three experiments were successful technically and in terms of geophysical conditions. Preliminary results are shown in this presentation.

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