The subject of this investigation is the errors appearing in Doppler SODAR measurements due to wind and temperature profiles. Usually the wind velocity is calculated from the measured Doppler shift under the assumption of straight line propagation. Wind and temperature profiles cause a deviation of the rays from the straight path which is given by the choice of geometry between transmitting antenna, receiving microphone and scattering volume. The appearing errors in the magnitude of the Doppler shift because of the displacement of the scattering volume, changes of scattering angle, and scattering vector have been investigated. Results from simulations, where the exact position of the scatterer, as well as the ray deformation, has been taken into account, show that upwind and downwind errors are symmetrical. This leads to a new method of measuring wind profiles. Outdoor measurements performed with a new SODAR configuration will be presented. Four receivers allow a construction in which each receiver pair builds a plane to measure down- and upwind components. The resulting two wind profiles describe the horizontal wind component. With a fifth receiver near the source, the vertical component should be measurable, so that the complete wind vector and even the temperature profile could be determined.
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