Radio AM FM 2013.pdf

Elektromagnetiske signaler – Mange bruksområder - ikke bare radio og TVSKiYMET meteor radar AndøyaPrinciple:Short electromagnetic pulses arecircularly polarized radiated by thetransmit antenna and after reflection onionisation trails of incident meteoridsreceived by 5 spatially separatedantennas. An interferometric analysisyields location, amplitude, and radialvelocity of each ionisation trail movedby the neutral wind. The wind field in 80- 110 km can be derived from amultitude of these individualinformations. Cf630010ms632,55101s 9,2mFrequency:Power:32.55 MHz12 kW PEPPulse length 13.3 µsRangeresolution:Transmitantenna:Receiveantenna:2 km1 crossed 3-elementYagi5 crossed 2-elementYagi15