Abstract: n a uniform terrain site, differences between a sodar and a mast-mounted cup anemometer will arise because of turbulent fluctuations and wind components being measured in different spaces, and because of the inherent ...

Abstract: round-based sensing of wind profiles by sodars and lidars is becoming the standard for wind energy and other applications. However, there remain difficulties in complex terrain since the instruments sense wind components ...

Abstract: The differential absorption of sound (DIAS) depends on frequency, temperature, and humidity in a known fashion. By obtaining turbulent reflections at two or more frequencies from the same target air mass, it is possible ...

Abstract: The design of a sodar that uses ultrasound to remotely sense drop size distributions in rainfall is described. The Doppler shift is proportional to a drop's terminal velocity and gives a measure of the drop diameter, whereas ...

Abstract: new method for calibration of sodar wind speed measurements is described. The method makes no assumptions whatsoever about the sodar operation and its hardware and software, other than the assumption that only one beam is ...

Abstract: This paper presents the development of a multisodar mode from a five-beam sodar whereby a wind speed vector is found for sets of three acoustic beams. If the vertical beam is used, this mode enables the profiling of four ...

Abstract: 21:1 scaled sodar, operating at 40 kHz, has been built and tested in the laboratory. Sodars, which use sound scattered by turbulence to profile the lowest few hundred meters of the atmosphere, need good acoustic shielding ...

Abstract: new ground-based wind profiling technology?a scanned bistatic sodar?is described. The motivation for this design is to obtain a ?mastlike? wind vector profile in a single atmospheric column extending from the ground to ...

Abstract: A method is developed for robust real-time visualization of aircraft vortex spatial and temporal development based on measurement data from a line array of sodars. The method relies on using a potential-flow vortex model, ...