All Outputs (12)

Fixed echo rejection in sodar using non-coherent matched filter detection and Gaussian mixture model based post-processing (2018)
Journal Article
Kendrick, P., & von Hünerbein, S. (2019). Fixed echo rejection in sodar using non-coherent matched filter detection and Gaussian mixture model based post-processing. Journal of Atmospheric and Oceanic Technology, 36(1), 3-16. https://doi.org/10.1175/jtech-d-18-0095.1

Doppler sodar (SOund Detection and Ranging) is a technology used for acoustic based remote sensing of the lower planetary boundary layer. Sodars are often used to measure wind profiles however, they suffer from problems due to noise (both acoustic a... Read More about Fixed echo rejection in sodar using non-coherent matched filter detection and Gaussian mixture model based post-processing.

The effect of microphone wind noise on the amplitude modulation of wind turbine noise and its mitigation (2016)
Journal Article
Kendrick, P., von Hünerbein, S., & Cox, T. (2016). The effect of microphone wind noise on the amplitude modulation of wind turbine noise and its mitigation. ˜The œJournal of the Acoustical Society of America (Online), 140(1), EL79. https://doi.org/10.1121/1.4955010

Microphone wind noise can corrupt outdoor recordings even when wind shields are used. When monitoring wind turbine noise, microphone wind noise is almost inevitable because measurements cannot be made in still conditions. The effect of microphone win... Read More about The effect of microphone wind noise on the amplitude modulation of wind turbine noise and its mitigation.

Simulating acoustic scattering from atmospheric temperature fluctuations using a k-space method (2014)
Journal Article
Hargreaves, J., Kendrick, P., & von Hünerbein, S. (2014). Simulating acoustic scattering from atmospheric temperature fluctuations using a k-space method. ˜The œJournal of the Acoustical Society of America (Online), 135(1), 82-92. https://doi.org/10.1121/1.4835955

This paper describes a numerical method for simulating far-field scattering from small regions of inhomogeneous temperature fluctuations. Such scattering is of interest since it is the mechanism by which acoustic wind velocity profiling devices (Dopp... Read More about Simulating acoustic scattering from atmospheric temperature fluctuations using a k-space method.

A bistatic sodar for precision wind profiling in complex terrain (2013)
Journal Article
Bradley, S., von Hünerbein, S., & Mikkelsen, T. (2013). A bistatic sodar for precision wind profiling in complex terrain. Journal of Atmospheric and Oceanic Technology, 29(8), 1052-1061. https://doi.org/10.1175/JTECH-D-11-00035.1

A 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 heights of more than 200 m. T... Read More about A bistatic sodar for precision wind profiling in complex terrain.

Beam geometry calibration of SODARs without use of a mast (2013)
Journal Article
Bradley, S., & von Hünerbein, S. (2013). Beam geometry calibration of SODARs without use of a mast. Journal of Atmospheric and Oceanic Technology, 30(9), 1-23. https://doi.org/10.1175/JTECH-D-12-00112.1

A 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 transmitted at a time. Reg... Read More about Beam geometry calibration of SODARs without use of a mast.

Structure-borne sound and vibration from building-mounted wind turbines (2011)
Journal Article
Moorhouse, A., Elliott, A., Eastwick, G., Evans, T., Ryan, A., von Hünerbein, S., …Waddington, D. (2011). Structure-borne sound and vibration from building-mounted wind turbines. Environmental Research Letters, 6(3), 035102. https://doi.org/10.1088/1748-9326/6/3/035102

Noise continues to be a significant factor in the development of wind energy resources. In the case of building-mounted wind turbines (BMWTs), in addition to the usual airborne sound there is the potential for occupants to be affected by structure-bo... Read More about Structure-borne sound and vibration from building-mounted wind turbines.

Relating urban boundary layer structure to upwind terrain for the Salfex campaign (2008)
Journal Article
Barlow, J., Rooney, G., von Hünerbein, S., & Bradley, S. (2008). Relating urban boundary layer structure to upwind terrain for the Salfex campaign. Boundary-Layer Meteorology, 127(2), 173-191. https://doi.org/10.1007/s10546-007-9261-y

Profiles of wind and turbulence over an urban area evolve with fetch in response to surface characteristics. Sodar measurements, taken on 22nd April 2002 during the Salfex campaign, are here related to upstream terrain. A logarithmic layer up to z=65... Read More about Relating urban boundary layer structure to upwind terrain for the Salfex campaign.

Atmospheric acoustic interferometer tomography of temperature and winds (2005)
Journal Article
Bradley, S., von Hünerbein, S., & Haddad, A. (2005). Atmospheric acoustic interferometer tomography of temperature and winds. Acta acustica united with Acustica, 91(6), 1025-1030

A technique is described for multiple-path propagation time measurements in the surface layer of the atmosphere. This is based on solving simple bi-directional ray tracing equations on successively higher penetrating paths using propagation times for... Read More about Atmospheric acoustic interferometer tomography of temperature and winds.

A doppler sodar case study of top-down convection and convective dissipation of stratus (2002)
Journal Article
von Hünerbein, S., & Richner, H. (2002). A doppler sodar case study of top-down convection and convective dissipation of stratus. Journal of Atmospheric and Oceanic Technology, 19(8), 1170-1180. https://doi.org/10.1175/1520-0426%282002%29019%3C1170%3AADSCSO%3E2.0.CO%3B2

Stratus dissipation over the Swiss Plateau has long been a forecasting problem. A case study of stratus structure and development was conducted during the winter of 1997/98. Measurements were performed with the monostatic Doppler sodar of the Swiss F... Read More about A doppler sodar case study of top-down convection and convective dissipation of stratus.

Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study
Journal Article
Kendrick, P., von Hünerbein, S., & Cox, T. Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study. ˜The œJournal of the Acoustical Society of America (Online), 138(3), 1731-1732. https://doi.org/10.1121/1.4933451

Microphone wind noise can corrupt outdoor measurements and recordings. It is a particular problem for wind turbine measurements because these cannot be carried out when the wind speed is low. Wind shields can be used, but often the sound level from... Read More about Using blind signal processing algorithms to remove wind noise from environmental noise assessments : a wind turbine amplitude modulation case study.

SODAR measurements of wing vortex strength and position
Journal Article
Bradley, S., Mursch-Radlgruber, E., & von Hünerbein, S. SODAR measurements of wing vortex strength and position. Journal of Atmospheric and Oceanic Technology, 24(2), 141-155. https://doi.org/10.1175/JTECH2037.1

A method is developed for robust real-time visualisation 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, with spatial averaging accor... Read More about SODAR measurements of wing vortex strength and position.

A systematic algorithm for obtaining SODAR wind profiles
Journal Article
Bradley, S., & von Hünerbein, S. A systematic algorithm for obtaining SODAR wind profiles. Meteorology and Atmospheric Physics, 85(1-3), 77-84. https://doi.org/10.1007/s00703-003-0035-x

Current methods of obtaining wind profiles from SODARs generally employ ad hoc strategies for Doppler spectrum peak selection, profile smoothing, and consistency checks. This paper addresses the problem of systematically obtaining vertical profiles o... Read More about A systematic algorithm for obtaining SODAR wind profiles.