The Andenes Meteorradar

Scheme of meteor observations with radars consisting of 1 transmitting antenna (red) and 5 receiving antennas (green)

Measuring principle

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.

Technical parameters


Frequency

32.55 MHz

Peak power

12 kW

Pulse width

13.3 µs

Height resolution

2 km

Transmitting antenna

1 crossed 3-elemente Yagi antenna

Receiving antenna

5 crossed 2-elemente Yagi antennas

 

 

Seasonal variation of mean daily meteor rates above Andenes from October 2001 till December 2004

Observation Data

  • Individual Meteor echoes (time, location, echo amplitude, radial velocity)
  • Wind field (80-90 km, hourly mean values, prevailing winds, 12h- and 24h tides)
  • Temperature near 90 km (deduced from diffusion coefficient)
  • Data of invading meteoroids (entry velocity, radiant)

Seasonal variation of mean daily meteor rates due to observations at Andenes between October 2001 and December 2004.

Current Signal

Meteor flux

Responsible staff