Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Radiosondes"”.
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Balloon Borne GPS-Enabled Radiosondes That Enable Simultaneous Multi-Point Atmospheric Sensing With a Single Ground Station
<p>Radiosondes are balloon borne atmospheric instruments that are a critical tool for understanding dynamics in the lower layers of the atmosphere. The low-cost radiosondes developed in the Space and Atmospheric Instrumentation Lab have been further developed to improve the system's use as a …
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Development, Verification, and Future Applications of a 3-DoF Entry and Descent Simulation Tool
… use the MER EDL system. The mission deploys six radiosondes, contained within pods, when the EDL system reaches a specified velocity. Dispersion patterns for the radiosondes follow the expected general trends established by the EDL Monte Carlo analysis.</p>
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Atmospheric temperature profile retrievals using 54 and 118-GHz spectral observations from the Proteus Aircraft
… required the use of the TIGR profile set of 1761 radiosondes from around the world. Using the entire set of simulated data, the RMS retrieval error averaged <2K for pressure levels from the surface to the aircraft. Data collected for retrievals were measured during CLOUDIOP, WVIOP, and AFWEX …
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Radiosonde High Altitude Measurements of Radiation Levels and Cosmic Ray Events
… the use of long-range radio transmitters such as radiosondes to transmit valuable data such as cosmic ray flux, geographical position, atmospheric temperature, pressure, etc. This can improve real-time radiation monitoring for aviation industry crew and passengers working in potentially higher …
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A climatology of the stratospheric temperature using purple crow raman lidar
… between measurements by the PCL and simultaneous radiosondes measurements in Detroit and Buffalo, as well as with atmospheric models, to determine the accuracy of the PCL measurements. An agreement to +1 K during summer months and ±2.5 K during the winter months is found. Comparison between PCL …
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High-Resolution Modelling of Surface-Atmosphere Interactions and Convection Development at Nam Co Lake, Tibetan Plateau
… and atmospheric profiles measured by radiosondes are used in this work in conjunction with the ATHAM (Active Tracer High-resolution Atmospheric Model) and Hybrid models. Substantial model development is undertaken for both ATHAM and Hybrid. This means a more consistent formulation of …
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A Wall of Smoke: Understanding the Drivers of the June 2023 Canadian Wildfire Smoke Event for New York City
… data from the NYS Mesonet Profiler Network, radiosondes, and ERA5 reanalysis, we document the connection between an anomalous quasi-stationary low pressure system over the northeast and anomalously high surface PM2.5 values approximately 1000 km away from the fires. We conclude that a strong, …
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An observational and analytical study of marginal ice zone atmospheric jets
… in the Beaufort Sea, the research team used radiosondes and shipboard instrumentation to detect several atmospheric jets in the atmospheric boundary layer or in the capping temperature inversion just above. The three strongest jets had maximum wind speeds at elevations near 350 m to 400 m …
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Analysis of atmospheric delays and asymmetric positioning errors in the global positioning system
… weather data such as numerical weather models, radiosondes, and satellite images. Analysis suggests that the direction of the skewness is generally parallel to the local topographic gradient at a scale of several kilometers. Comparison with weather data suggests that outlier data points in the …
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Passive microwave and hyperspectral infrared retrievals of atmospheric water vapor profiles
… combination, based on comparisons with nearby radiosondes.
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Alternative metrics for measuring heating trends, with possible connections between the surface and troposphere
… reanalysis data are examined from 1979-2001. Radiosondes compare favorably to reanalysis data. The upper troposphere indicates cooling, while the lower troposphere is neutral or slightly warming. Comparisons of tropospheric and surface trends for the eastern United States show similar seasonal …
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Sensing atmospheric water vapour using the global positioning system
… to measurements made by other techniques, namely radiosondes, water vapour radiometry and very long baseline interferometry (VLBI). A high degree of correlation is observed in all instances of inter-technique comparison. The usefulness of GPS-derived slant delays is demonstrated by their ability …
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Layer-layer interactions in atmospheric, cryospheric, and stellar dynamics
… stratospheric monsoon temperatures from both radiosondes and reanalysis have been cooling over the observational record, suggesting enhanced upwelling through the monsoon anticyclone, and increased stratospheric dehydration. The second system this dissertation focuses on is layered viscous …
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Three-dimensional water vapor retrieval using a network of scanning compact microwave radiometers
… profiles are obtained using in-situ sensors on radiosondes and remotely using lidars, GPS ground-based networks, CPS radio occultation from satellites and a relatively small number of space-borne microwave and infrared radiometers. In-situ radiosonde measurements have excellent vertical …
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An Observational Investigation on Gravity Wave Characteristics and Propagation in the Lower Stratosphere and Mesopause
… to reflect the fact that waves derived from radiosondes have slant propagation paths. They travel long distance horizontally before they reach higher altitudes. Long term gravity wave characteristics over Maui from 2002 to 2007 are deduced from OH airglow imager. Wave parameters from the long …
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Quantifying and reducing the uncertainties in global contrail radiative forcing
… - ERA5 and MERRA-2. Using data from 793,044 radiosondes, persistent contrails forming at cruise altitudes in 30°N – 60°N are overestimated by factors of 2.0 and 3.5 for ERA5 and MERRA-2, respectively. I also define the evaporation depth, which measures the depth to which a contrail can …
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Comparative aerosol studies based on multi-wavelength Raman LIDAR at Ny-Ålesund, Spitsbergen
… with data from other instruments on site, namely radiosondes, sun photometer, Micro Pulse LIDAR, and tethersonde system, resulted in a comprehensive data set of scattering phenomena in the Arctic atmosphere. The two spring periods March and April 2007 and 2009 were at first analyzed based on …
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Design and Development of Distributed Lower Atmospheric Instrumentation Packages
<p>The recent miniaturization of embedded electronics and widespread availability of low-cost sensors, microcontrollers and transceivers has enabled development of sensor suites that can be used for high temporal and spatial resolution measurements of atmospheric parameters such as temperature, …