| 摘要 |
A Sodar apparatus is disclosed for sounding the atmosphere. The apparatus includes a transducer for converting an electrical signal to an acoustic wave and/or vice-versa and transferring means associated with the transducer for transferring the acoustic wave towards the atmosphere and/or for transferring a reflected acoustic wave from the atmosphere. The apparatus further includes isolating means or structure for isolating or attenuating the acoustic wave such that energy of the acoustic wave transferred in a substantially horizontal direction is reduced below energy of the acoustic wave transferred in a substantially vertical direction by a factor of at least 45dB and more preferably by a factor of at least 70dB. A method for sounding the atmosphere is also disclosed. |
