Anemometer ≈ Anemometer
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A transformer-based deep neural network with wavelet transform for forecasting wind speed and wind energy Open
This work presents a novel transformer-based deep neural network architecture integrated with wavelet transform for forecasting wind speed and wind energy (power) generation for the next 6 h ahead, using multiple meteorological variables a…
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Ocean Wind and Wave Measurements Using X-Band Marine Radar: A Comprehensive Review Open
Ocean wind and wave parameters can be measured by in-situ sensors such as anemometers and buoys. Since the 1980s, X-band marine radar has evolved as one of the remote sensing instruments for such purposes since its sea surface images conta…
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Wind turbine power production and annual energy production depend on atmospheric stability and turbulence Open
Using detailed upwind and nacelle-based measurements from a General Electric (GE) 1.5sle model with a 77 m rotor diameter, we calculate power curves and annual energy production (AEP) and explore their sensitivity to different atmospheric …
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Study of different parameters estimation methods of Weibull distribution to determine wind power density using ground based Doppler SODAR instrument Open
The effectiveness of nine different numerical methods is examined for calculating the parameters of Weibull distribution at three different heights 80 m, 100 m and 120 m to estimate wind power density. The measurement campaign was conducte…
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Characteristics of intense winds in mountain area based on field measurement: Focusing on thunderstorm winds Open
With the development of mountain areas, more wind-sensitive infrastructures are constructed. In the design of these infrastructures, the wind loading cannot be accurately obtained from the code based on the flat area. Hence, it is of great…
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Graphite on paper as material for sensitive thermoresistive sensors Open
We report on the thermoresistive properties of graphite on paper (GOP). A large temperature coefficient of resistance was observed and a highly sensitive GOP-based anemometer was demonstrated, indicating strong feasibility of using the GOP…
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Measurements of wind turbulence parameters by a conically scanning coherent Doppler lidar in the atmospheric boundary layer Open
The method and results of lidar studies of spatiotemporal variability of wind turbulence in the atmospheric boundary layer are reported. The measurements were conducted by a Stream Line pulsed coherent Doppler lidar (PCDL) with the use of …
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Correction of a Non-orthogonal, Three-Component Sonic Anemometer for Flow Distortion by Transducer Shadowing Open
We propose that flow distortion within a non-orthogonal CSAT3 sonic anemometer is primarily due to transducer shadowing, which is caused by wakes in the lee of the acoustic transducers impinging on their measurement paths. The dependence o…
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Turbulent kinetic energy estimates from profiling wind LiDAR measurements and their potential for wind energy applications Open
This study shows that turbulent kinetic energy (TKE) estimates, derived from static LiDARs in Doppler Beam Swing (DBS) mode, permit a qualitative and quantitative characterization and analysis of turbulent structures as wind turbine wakes,…
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GADEN: A 3D Gas Dispersion Simulator for Mobile Robot Olfaction in Realistic Environments Open
This work presents a simulation framework developed under the widely used Robot Operating System (ROS) to enable the validation of robotics systems and gas sensing algorithms under realistic environments. The framework is rooted in the pri…
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High‐resolution wind speed measurements using actively heated fiber optics Open
We present a novel technique to simultaneously measure wind speed ( U ) at thousands of locations continuously in time based on measurement of velocity‐dependent heat transfer from a heated surface. Measuring temperature differences betwee…
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Evaluation of turbulence measurement techniques from a single Doppler lidar Open
Measurements of turbulence are essential to understand and quantify the transport and dispersal of heat, moisture, momentum, and trace gases within the planetary boundary layer (PBL). Through the years, various techniques to measure turbul…
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Evaluating anemometer drift: A statistical approach to correct biases in wind speed measurement Open
Recent studies on observed wind variability have revealed a decline (termed "stilling") of near-surface wind speed during the last 30–50 years over many mid-latitude terrestrial regions, particularly in the Northern Hemisphere. The well-kn…
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Identifying cloud, precipitation, windshear, and turbulence by deep analysis of the power spectrum of coherent Doppler wind lidar Open
Researches on the atmospheric boundary layer (ABL) need accurate measurements with high temporal and spatial resolutions from a series of different instruments. Here, a method for identifying cloud, precipitation, windshear, and turbulence…
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Finite element analysis of trees in the wind based on terrestrial laser scanning data Open
Wind damage is an important driver of forest structure and dynamics, but it is poorly understood in natural broadleaf forests. This paper presents a new approach in the study of wind damage: combining terrestrial laser scanning (TLS) data …
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Towards accurate and practical drone-based wind measurements with an ultrasonic anemometer Open
Wind data collection in the atmospheric boundary layer benefits from short-term wind speed measurements using unmanned aerial vehicles. Fixed-wing and rotary-wing devices with diverse anemometer technology have been used in the past to pro…
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Local- and regional-scale measurements of CH <sub>4</sub> , δ <sup>13</sup> CH <sub>4</sub> , and C <sub>2</sub> H <sub>6</sub> in the Uintah Basin using a mobile stable isotope analyzer Open
In this paper, we present an innovative CH4, δ13CH4, and C2H6 instrument based on cavity ring-down spectroscopy (CRDS). The design and performance of the analyzer is presented in detail. The instrument is capable of precision of less than …
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Validating precision estimates in horizontal wind measurements from a Doppler lidar Open
Results from a recent field campaign are used to assess the accuracy of wind speed and direction precision estimates produced by a Doppler lidar wind retrieval algorithm. The algorithm, which is based on the traditional velocity-azimuth-di…
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Application of Convolutional Long Short-Term Memory Neural Networks to Signals Collected from a Sensor Network for Autonomous Gas Source Localization in Outdoor Environments Open
Convolutional Long Short-Term Memory Neural Networks (CNN-LSTM) are a variant of recurrent neural networks (RNN) that can extract spatial features in addition to classifying or making predictions from sequential data. In this paper, we ana…
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Estimation of turbulence intensity using rotor effective wind speed in Lillgrund and Horns Rev-I offshore wind farms Open
Turbulence characteristics of the wind farm inflow have a significant impact on the energy production and the lifetime of a wind farm. The common approach is to use the meteorological mast measurements to estimate the turbulence intensity …
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Influence of Air Temperature and Velocity for Drying Process Open
One of the important treatment of some farm products is drying process. Blowing the hot air to the object is the most common method of this process thus water contained is evaporated. In this study, the influence of air temperature and vel…
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Estimation of turbulence dissipation rate and its variability from sonic anemometer and wind Doppler lidar during the XPIA field campaign Open
Despite turbulence being a fundamental transport process in the boundary layer, the capability of current numerical models to represent it is undermined by the limits of the adopted assumptions, notably that of local equilibrium. Here we l…
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Properties of the offshore low level jet and rotor layer wind shear as measured by scanning Doppler Lidar Open
The atmospheric flow phenomenon known as the Low Level Jet (LLJ) is an important source of wind power production in the Great Plains. However, due to the lack of measurements with the precision and vertical resolution needed, particularly …
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Field intercomparison of prevailing sonic anemometers Open
Three-dimensional sonic anemometers are the core component of eddy covariance systems, which are widely used for micrometeorological and ecological research. In order to characterize the measurement uncertainty of these instruments we pres…
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Wind field reconstruction from nacelle-mounted lidar short-range measurements Open
Profiling nacelle lidars probe the wind at several heights and several distances upstream of the rotor. The development of such lidar systems is relatively recent, and it is still unclear how to condense the lidar raw measurements into use…
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Virtual fatigue diagnostics of wake-affected wind turbine via Gaussian Process Regression Open
We propose a data-driven model to predict the short-term fatigue Damage Equivalent Loads (DEL) on a wake-affected wind turbine based on wind field inflow sensors and/or loads sensors deployed on an adjacent up-wind wind turbine. Gaussian P…
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SWiFT site atmospheric characterization Open
Historical meteorological tall tower data are analyzed from the Texas Tech University 200 m tower to characterize the atmospheric trends of the Scaled Wind Farm Technologies (SWiFT) site. In this report the data are analyzed to reveal bulk…
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Evaluation of single and multiple Doppler lidar techniques to measure complex flow during the XPIA field campaign Open
Accurate three-dimensional information of wind flow fields can be an important tool in not only visualizing complex flow but also understanding the underlying physical processes and improving flow modeling. However, a thorough analysis of …
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How wind speed shear and directional veer affect the power production of a megawatt-scale operational wind turbine Open
Most megawatt-scale wind turbines align themselves into the wind as defined by the wind speed at or near the center of the rotor (hub height). However, both wind speed and wind direction can change with height across the area swept by the …
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Fiber-optic anemometer based on single-walled carbon nanotube coated tilted fiber Bragg grating Open
In this work, a novel and simple optical fiber hot-wire anemometer based on single-walled carbon nanotubes (SWCNTs) coated tilted fiber Bragg grating (TFBG) is proposed and demonstrated. For the hot-wire wind speed sensor design, TFBG is a…