The Andenes Meteorradar
Short electromagnetic pulses are circumpolarly transmitted and from ionisation traces of invading meteoroids backwards reflected if the ionisation trace is perpendicular corresponding to the radar beam. The meteor echo is received by a reception antenna system consisting of 5 crossed Yagi antennas and is interferometrically analysed, thus estimating the time, location, the echo amplitude, and the radial velocity of the ionisation trace moving with the neutral wind. From many of such individual observations among other things the wind field for an altitude range between about 80 and 110 km can be estimated. The measurements with the Andenes-Meteorradar are continuously carried out since October 2001.
1 crossed 3-elemente Yagi antenna
5 crossed 2-elemente Yagi antennas