Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3161-3180 of 5084
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Analysis of a Radome Air-Motion System on a Twin-Jet Aircraft for Boundary-Layer Research
(American Meteorological Society, 1991)A ?radome gust probe? system was installed on a twin-jet aircraft for the purpose of boundary-layer research. This system provided a useful relatively low-cost method for air motion and turbulence measurements on an aircraft ... -
Test and Calibration of the DLR Falcon Wind Measuring System by Maneuvers
(American Meteorological Society, 1991)After a short survey of the flight maneuvers of the Falcon the high-frequency pitching and yawing oscillations are treated in detail. It is shown that nearly all measured quantities essential for turbulence can be synchronized ... -
Operational Systems for Observing the Lower Atmosphere: Importance of Data Sampling and Archival Procedures
(American Meteorological Society, 1990)A brief field project was conducted during July 1988 to assess the potential for Next Generation Weather Radar (NEXRAD), 404-MHz radar wind profilers, and digital sounding systems to monitor the low-level wind field during ... -
Effects of Raindrop-Size Distribution Variation within the Radar Scattering Volume on Radar Observables
(American Meteorological Society, 1990)Dual linear polarization weather radars measure as primary observables the mean power P?H, and P?V, corresponding to returns at horizontal and vertical polarizations, respectively. Differential reflectivity ZDR is defined ... -
Preliminary Evaluation of the First NOAA Demonstration Network Wind Profiler
(American Meteorological Society, 1990)The first wind profiler for a demonstration network of wind profilers recently passed the milestone of 300 h of continuous operation. The horizontal wind component measurements taken during that period are compared with ... -
A Simple Technique for Multiple-Parameter Pattern Recognition with an Example of Locating Fronts in Model Output
(American Meteorological Society, 1990)A statistical pattern recognition technique called IREW is described. IREW has several strengths, such as fast execution, small storage requirements, and increments learning, that may make the technique useful for many ... -
The Colorado Wind-Profiling Network
(American Meteorological Society, 1984)Remote sensing instrumentation has advanced to the point where serious consideration is being given to a next-generation tropospheric sounding system that uses radars and radiometers to provide profiles of tropospheric ... -
Estimating the Temperature Error of the Radiosonde Rod Thermistor under Different Environments
(American Meteorological Society, 1990)A technique was developed to calculate the radiosonde temperature error as a function of altitude under different environmental conditions. The environmental conditions analyzed include the surface (or cloud) temperature, ... -
High-Spectral Resolution Lidar Measurement of Tropospheric Backscatter Ratio Using Barium Atomic Blocking Filters
(American Meteorological Society, 1990)Initial measurements of the aerosol backscatter ratio using a new atomic barium filter (FWHM from 2.0?3.0 GHz at 553.7 nm) in conjunction with a narrowband-pulsed dye laser system are reported. Using analog detection and ... -
Single-Doppler Radar Analysis of Banded Precipitation Structures
(American Meteorological Society, 1990)A method for the analysis of single-Doppler radar data called band-velocity-processing (BVP) is presented. The BVP method was designed to exploit the two-dimensional nature of banded precipitation systems with crossband ... -
Evaluation of the Maximum Cross-Correlation Method of Estimating Sea Surface Velocities from Sequential Satellite Images
(American Meteorological Society, 1990)We evaluate the method of estimating sea surface velocities from sequences of AVHRR and CZCS images using the maximum cross-correlation (MCC) technique. A set of synthetic images is created by advecting an AVHRR-SST field ... -
Turbulence Sensor Dynamic Calibration Using Real-Time Spectral Computations
(American Meteorological Society, 1990)The integration of plug-in Fast Fourier Transform (FFT) boards in data acquisition computers allows a considerable development in the dynamic calibration of turbulence sensors. The spectral transfer function of a fast and ... -
An Examination of Propagation Effects in Rainfall on Radar Measurements at Microwave Frequencies
(American Meteorological Society, 1990)Propagation effects in rainfall are examined at three microwave frequencies corresponding to S (3.0 GHz), C (5.5 GHz), and X (10.0 GHz) bands. Attenuation at horizontal polarization, as well as differential attenuation and ... -
Evolution of Dropsize Distributions in Liquid Precipitation Observed by Ground-Based Doppler Radar
(American Meteorological Society, 1990)A technique is described for using ground-based Doppler radars to monitor the development of the drop-size spectra of number density, liquid-water density, and liquid flux, in time and height. It is shown how such observations ... -
Three-Wavelength Method of Measuring Path-Averaged Turbulent Heat Fluxes
(American Meteorological Society, 1990)Conceptually, electro-optical measurements of the path-averaged refractive index structure parameter Cn2 at three wavelengths should yield measurements of the vertical fluxes of sensible (Hs) and latent (HL) heat. With ... -
Dependence of Reflectivity Factor—Rainfall Rate Relationship on Polarization
(American Meteorological Society, 1990)The reflectivity factor (Z), rainfall rate (R) relationship for weather radars that probe precipitation at low elevation angles is sensitive to polarization. It is shown how to transform a relation that is valid with one ... -
A Two-Dimensional Hydrometeor Machine Classifier Derived from Observed Data
(American Meteorological Society, 1984)Classification algorithms have been developed to distinguish six categories of cloud ice particles. These algorithms have been incorporated in schema which, when applied to shadowgraph images produced by the Precision ... -
Measurements of the Directional Spectra of Shallow Water Waves Using the Maximum Entropy Principle and a Single Ocean Bottom Seismometer
(American Meteorological Society, 1990)A new method for measurement of the directional spectra of surface gravity (water) waves is presented here. Measurements are made at a single point by orthogonally mounted seismometers buried 0.5 meters below the seabed ... -
BLIPS: A System for Studying Benthic Boundary Layer Dynamics
(American Meteorological Society, 1990)A Boundary Layer Interaction Profiting System (BLIPS) has been developed to measure kinematic quantities necessary for verification of theoretical, two-phase boundary layer flow models. BLIPS sensors include electromagnetic ... -
A Method for Improving Rain Estimates from Vertical-Incidence Doppler Radar Observations
(American Meteorological Society, 1990)For an exponential drop size distribution, the mean Doppler velocity at vertical incidence, after correction for vertical air motion, depends only on the slope of the distribution. The intercept of the distribution can ...