First low power VHF radar observations of tropospheric, stratospheric and mesospheric winds and turbulence at the Arecibo Observatory

摘要: Abstract First VHF radar measurements with height resolution of 300 m and angular 1.7° were carried out in low latitudes at the Arecibo Observatory, Puerto Rico. A short outline is given experimental set-up which consisted a 160W average power radar-transceiver self-contained digital control data acquisition unit. The new feed system dish described shortly. Reliable echoes detected from troposphere, lower stratosphere some heights mesosphere, indicating that capable proper investigations dynamical processes latitude middle atmosphere. dependence aspect sensitive tropospheric stratospheric turbulence structures was measured to be 1.5–2.5 dB degree −1 . Echoes mesosphere indicate patchy structure turbulence. analysis signal-to-noise ratio shows considerably high reflectivity upper can caused by high-reaching tropical cumulus convection. Wind profiles between 7.5 19.5 km 300m are very similar radiosonde wind profiles. Mesospheric winds roughly consistent amplitude tidal winds.