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Showing 1 to 13 of 13 for “"Sonic Anemometer"”.
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Methane Emission Monitoring of Appalachian Compressor Station
… LI-7500A - CO_2/H_2 O analyzer as well as a sonic anemometer these sensors could be observed remotely through cellular connection. The data is represented in flux output ((µmol)/(s m^2 )) as well as kg CO_2 equivalence of methane outlined by the EPA greenhouse gas inventory. The average daily …
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Vertical Concentration Gradient of Influenza Viruses Resuspended from Floor Dust
… at various heights above the floor. Using a sonic anemometer, we measured the velocity field from floor to ceiling at 10-cm intervals to estimate the magnitude of turbulence generated by walking. The resulting eddy diffusion coefficients varied between 0.06 m2 s-1 and 0.20 m2 s-1 and were …
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Sediment Transport and Wind Flow Around Hummocks
… data collection recorded wind velocities using a sonic anemometer upwind of the hummock, grain impacts from four miniphones deployed on and to the side of the hummock (MICs), trap-derived sand transport, and hummock vegetation density. These data sets provide the parameters for model-estimated …
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Quality control and analysis of an updated wind gust data set in the United States
… ASOS averaging time and instrumentation, such as sonic anemometer installation, introduces three distinct eras in the data set. Overall, this work represents the most complete data set ever assembled for CONUS ASOS stations and demonstrates improvements over the previous data set, improving …
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The steps in the development of an atmospheric vorticity meter
… acoustic measurements in the ocean. Compared to sonic anemometer measurements, the BASS measurements of velocity are not only made in a different fluid but in a different way. Due to these differences, the physical make up of BASS needed to be altered, and the validity of the measurement …
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Sensing Atmospheric Winds from Quadrotor Motion
… and field experiments conducted next to a 3-D sonic anemometer. The dissertation also presents an extension of the rigid body wind estimation framework to profile the horizontal components of wind velocity in vertical steady ascending flight. The extension employed system identification to …
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An Invariant Extended Kalman Filter for Indirect Wind Estimation Using a Small, Fixed-Wing Uncrewed Aerial Vehicle
… using, for example, a five-hole Pitot probe or a sonic anemometer mounted on an aircraft, or indirectly. Indirect measurement methods consider the dynamics of the aircraft and use measurements from its operational sensor suite to infer wind velocity. This work is concerned with the design of the …
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Advection at a forest site – an updated approach
… rotation to align the coordinate system of the sonic anemometer with the long-term stream lines. Spatial variability of the wind field was addressed by a sector-wise coordinate rotation. An investigation of temporal aspects of vertical wind velocity showed significant contributions from low …
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Directional wavenumber characteristics of short sea waves
… A rotating X-band scatterometer, a sonic anemometer, and a capacitive wire wave gage were mounted on the tower. The wave gage buoy was deployed nearby. The resulting data supports a narrowing trend in the two-dimensional spectral width as a function of wavenumber. Two current …
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Air pollution modelling over complex topography
… with turbulence data acquired by means of a sonic anemometer during a field campain performed by the Department. Finally, the analysis of near field dispersion over complex terrain has been extended to the urban context, adopting, basically, the same conceptual tools on a smaller scale. A …
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Site-specific modelling of turbulent fluxes on the Tibetan Plateau
… from coordinate rotation for non-omnidirectional sonic anemometer, which requires a careful handling. In consequence, a sector-wise planar-fit is recommended, disregarding the sector influenced by the anemometer's mounting structure. This can reduce occurrences of invalid momentum flux data, …
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Compressible Flow Characterization Using Non-Intrusive Acoustic Measurements
… and temperature have been restricted to low subsonic Mach number applications due to increased complexities associated with acoustic refraction, low signal-to-noise ratios, and a limited range of practical applications. In the current work, the use of acoustics for non-intrusive flow monitoring …
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Study of the atmospheric boundary layer processes over sloping terrain covered by sparse canopy
… in order to calibrate flux sensors (i.e., ultrasonic anemometers), and subsequently into three N-W Italy vineyards fields, collecting long term turbulent flux observations over the canopy. Bulk and higher order statistics are explored from these dataset to investigate the turbulent properties of …