A5087167503- Meteorological Phenomena and Simulations
- Ionosphere and magnetosphere dynamics
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Wind and Air Flow Studies
- Aerospace and Aviation Technology
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- Soil Moisture and Remote Sensing
- Air Traffic Management and Optimization
- Avian ecology and behavior
- Species Distribution and Climate Change
- Fluid Dynamics and Turbulent Flows
- Bat Biology and Ecology Studies
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Ocean Waves and Remote Sensing
- Atmospheric Ozone and Climate
- GNSS positioning and interference
- Wildlife Ecology and Conservation
- Radar Systems and Signal Processing
- Radio Wave Propagation Studies
- Astro and Planetary Science
- Remote Sensing and LiDAR Applications
- Climate variability and models
University of Oklahoma
2014-2023
Radar (United States)
2009-2022
Center For Remote Sensing (United States)
2021
Applied Radar (United States)
2017
Cooperative Institute for Mesoscale Meteorological Studies
2009-2010
Cooperative Institute for Research in Environmental Sciences
1997-2005
NOAA Earth System Research Laboratory
2005
University of Colorado Boulder
2000-2003
NSF National Center for Atmospheric Research
2003
University of Nebraska–Lincoln
2003
Basic questions about the life histories of migratory birds have confounded scientists for generations, yet we are nearing an era historic discovery as new tracking technologies make it possible to determine timing and routes increasing number bird migrations. Tracking small flying animals they travel over continental-scale distances is a difficult logistical engineering challenge. Although no system works well with all species, improvements traditional technologies, such satellite tracking,...
Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of development and application these systems, improving knowledge best practices for accurate measurement is critical achieving scientific goals. We present results from an intercomparison data Lower Atmospheric Process Studies at Elevation-a Remotely piloted Aircraft Team Experiment (LAPSE-RATE) field campaign. evaluate a total 38 individual sUAS with 23 unique sensor platform...
This paper discusses results of the CLOUD-MAP (Collaboration Leading Operational UAS Development for Meteorology and Atmospheric Physics) project dedicated to developing, fielding, evaluating integrated small unmanned aircraft systems (sUAS) enhanced atmospheric physics measurements. The team includes scientists, meteorologists, engineers, computer geographers, chemists necessary evaluate needs develop advanced sensing imaging, robust autonomous navigation, data communication, management...
ABSTRACT Because unmanned aircraft systems (UAS) offer new perspectives on the atmosphere, their use in atmospheric science is expanding rapidly. In support of this growth, International Society for Atmospheric Research Using Remotely-Piloted Aircraft (ISARRA) has been developed and convened annual meetings “flight weeks.” The 2018 flight week, dubbed Lower Profiling Studies at Elevation–A Team Experiment (LAPSE-RATE), involved a 1-week deployment to Colorado’s San Luis Valley. Between 14 20...
Aeroecology is an emerging scientific discipline that integrates atmospheric science, Earth geography, ecology, computer computational biology, and engineering to further the understanding of biological patterns processes. The unifying concept underlying this new transdisciplinary field study a focus on planetary boundary layer lower free atmosphere (i.e., aerosphere), diversity airborne organisms inhabit depend aerosphere for their existence. Here, we role radars radar networks in...
Interest in forecasting impacts of climate change have heightened attention recent decades to how animals respond variation and weather patterns. One difficulty determining animal response is lack long-term datasets that record behaviors over decadal scales. We used radar observations from the national NEXRAD network Doppler radars measure group behavior a colonially-roosting bat species responded annual daily past 11 years. Brazilian free-tailed bats (Tadarida brasiliensis) form dense...
Weather radars provide near‐continuous recording and extensive spatial coverage, which is a valuable resource for biologists, who wish to observe study animal movements in the aerosphere over wide range of temporal scales. Powerful biological inferences can be garnered from radar data that have been processed primarily with intention understanding meteorology. However, when seeking answer certain quantitative questions, e.g., those related density animals, assumptions made processing...
Abstract. Integrating sensors with a rotary-wing unmanned aircraft system (rwUAS) can introduce several sources of biases and uncertainties if not properly accounted for. To maximize the potential for rwUAS to provide reliable observations, it is imperative have an understanding their strengths limitations under varying environmental conditions. This study focuses on quality measurements relative sensor locations board rwUAS. Typically, thermistors require aspiration proper siting free heat...
Abstract The potential value of small unmanned aircraft systems (UAS) for monitoring the preconvective environment and providing useful information in real time to weather forecasters evaluation at a National Weather Service (NWS) Forecast Office are addressed. general goal was demonstrate whether combination fixed-wing rotary-wing UAS can provide detailed, accurate, measurements boundary layer important determining convection initiation (CI). Two field operations were held: validation study...
Abstract. The CopterSonde is an unmanned aircraft system (UAS) developed in house by a team of engineers and meteorologists at the University Oklahoma. ambitious attempt Center for Autonomous Sensing Sampling to address challenge filling observational gap present lower atmosphere among currently used meteorological instruments such as towers radiosondes. unique highly flexible platform situ atmospheric boundary layer measurements with high spatial temporal resolution, suitable applications...
Obtaining thermodynamic measurements using rotary-wing unmanned aircraft systems (rwUAS) requires several considerations for mitigating biases from the and its environment. In this study, we focus on how method of temperature sensor integration can impact quality measurements. To minimize non-environmental heat sources prevent any contamination coming rwUAS body, two configurations with different placements are proposed comparison. The first configuration consists a custom quadcopter...
The need exists for measurements with high vertical resolution when observing the variety of atmospheric processes extremely small extent, such as microscale turbulence and scattering layers associated inertia gravity waves. For example, recent in situ observations have shown that both humidity temperature “sheets,” thicknesses order meters, exist throughout lower atmosphere. Hampered by bandwidth constraints, however, standard pulsed radar systems only limited usefulness detection...
Abstract Rapid changes in seasonal avian migrations provide compelling examples of biotic response to climate change. Seasonal waves land surface phenology and temperature are thought be primary exogenous cues that migrants use fine tune migration timing. Exploration the role these play regulating timing requires better spatial, temporal, taxonomic sampling than is typically available. We analyze weather surveillance radar ( WSR ) eB ird citizen science data an effort understand macroscale...
Abstract This paper presents an overview of the Lower Atmospheric Boundary Layer Experiment (LABLE), which included two measurement campaigns conducted at Radiation Measurement (ARM) Program Southern Great Plains site in Oklahoma during 2012 and 2013. LABLE was as a collaborative effort between University (OU), National Severe Storms Laboratory, Lawrence Livermore Laboratory (LLNL), ARM program. can be considered unique that it designed multiphase, low-cost, multiagency collaboration....
Abstract. Several errors occur when a traditional Doppler beam swinging (DBS) or velocity–azimuth display (VAD) strategy is used to measure turbulence with lidar. To mitigate some of these errors, scanning was recently developed which employs six positions independently estimate the u, v, and w velocity variances covariances. In order assess ability different techniques turbulence, Halo lidar, WindCube v2 pulsed ZephIR continuous wave lidar were deployed at field sites in Oklahoma Colorado...
Abstract The radar scattering characteristics of aerial animals are typically obtained from controlled laboratory measurements a freshly harvested specimen. These tedious to perform, difficult replicate, and yield only small subset the full azimuthal, elevational, polarimetric radio data. As an alternative, biological applications often assume that cross sections flying isotropic, since sophisticated computer models required estimate 3D properties objects having complex shapes. Using method...
Bathymetric surveying to gather information about depths and underwater terrain is increasingly important the sciences of hydrology geomorphology. Submerged change detection, water level, reservoir storage monitoring demand extensive bathymetric data. Despite often being scarce or unavailable, this fundamental hydrodynamic modeling for imposing boundary conditions building computational domains. In manuscript, a novel, low-cost, rapid, accurate method developed measure submerged topography,...
Abstract. It is widely accepted that the atmospheric boundary layer drastically under-sampled in vertical dimension. In recent years, commercial availability of ground-based remote sensors combined with widespread use small, weather-sensing uncrewed aerial systems (WxUAS) has opened up many opportunities to fill this measurement gap. July 2018, University Oklahoma (OU) deployed a state-of-the-art WxUAS, dubbed CopterSonde, and Collaborative Lower Atmospheric Mobile Profiling System (CLAMPS)...
Abstract The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Program (ISOBAR) is a research project investigating stable atmospheric boundary layer (SBL) processes, whose representation still poses significant challenges state-of-the-art numerical weather prediction (NWP) models. In ISOBAR ground-based flux and profile observations are combined with remote sensing methods extensive usage of different unmanned aircraft systems (UAS). During February 2017 2018...
One of the primary ecological manifestations climate change is a shift in timing events species' annual cycle. Such phenological shifts have been documented numerous taxa, but data for animals derived primarily from human observers rather than networks instruments used remote sensing. The potential to use network weather radars United States (NEXRAD) remotely sense animal phenologies could advance our understanding spatiotemporal scaling relation local and regional climate. We tested utility...
Abstract Uncrewed aircraft system (UAS) observations collected during the 2018 Lower Atmospheric Process Studies at Elevation—a Remotely Piloted Aircraft Team Experiment (LAPSE-RATE) field campaign were assimilated into a high-resolution configuration of Weather Research and Forecasting Model using an ensemble Kalman filter. The benefit UAS was assessed for terrain-driven (drainage upvalley) flow event that occurred within Colorado’s San Luis Valley (SLV) independent observations. analysis...