Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3221-3240 of 5084
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Deep-Ocean Bottom Pressure Measurement: Drift Removal and Performance
(American Meteorological Society, 1990)Sixteen records from seven Digiquartz deep-ocean bottom pressure sensors have been in deployments of 3?12 month duration under the Gulf Stream in depths of 3300 to 4400 m. Particular attention is given (i) to characterizing ... -
Studies of the Polarimetric Covariance Matrix. Part II: Modeling and Polarization Errors
(American Meteorological Society, 2003)A polarimetric radar covariance matrix model is described to study the behavior of the co-to-cross covariances in precipitation. The 2 ? 2 propagation matrix with attenuation, differential attenuation, and differential ... -
Contour Analysis: A New Approach for Melding Geophysical Fields
(American Meteorological Society, 1990)This paper introduces a new approach, contour analysis, for combining independent estimates of a geophysical field to produce a single realization incorporating data from all sources. Contour analysis divides the field ... -
Optimal Control Theory Applied to an Objective Analysis of a Tidal Current Mapping by HF Radar
(American Meteorological Society, 1990)Optimal control can provide a tool to perform an optimization of a tidal model via a data assimilation operation. A pilot study is presented here to test the theoretical and numerical feasibility of an assimilation of HF ... -
Measurement of Raindrop Size Distributions Using a Small Doppler Radar
(American Meteorological Society, 1990)A small X-band bistatic Doppler radar originally developed for use in automated weather stations as a Precipitation Occurrence Sensor System (POSS) can also measure real time raindrop size distributions. In contrast to ... -
An Operational Global-Scale Ocean Thermal Analysis System
(American Meteorological Society, 1990)The Optimum Thermal Interpolation System (OTIS) is an ocean thermal analysis product developed for real-time operational use at the U.S. Navy's Fleet Numerical Oceanography Center. It functions in an analysis-prediction-analysis ... -
Determination of the Boundary Layer Airflow from a Single Doppler Radar
(American Meteorological Society, 1990)In the warm season the optically clear boundary layer often contains scatterers that can be detected by sensitive radars to distances of 50?100 km. Inhomogeneities in the field of reflectivity lead to echo patterns that ... -
Assessment of the Geometric and Temporal Errors Associated with Airborne Doppler Radar Measurements of a Convective Storm
(American Meteorological Society, 1990)On 20 April 1984, the NOAA WP-3D aircraft, equipped with a Doppler radar in its tail, flew around a growing thunderstorm new Norman, Oklahoma. Doppler wind data was collected as the airplane flew six legs around the storm. ... -
Fourier and Moment Methods Applied to Two-Dimensional Raindrop Images
(American Meteorological Society, 1990)Two-dimensional PMS precipitation probes mounted with horizontal optical axis have been previously used to study the shapes of hydrometeors such as raindrops and graupel. Fourier and moment descriptors have been applied ... -
Radiative Measurements of Pressure Modulator Operation
(American Meteorological Society, 1990)The pressure modulator is extensively used in atmospheric measurements but is not well characterized in terms of its spectroscopic operation. A series of measurements on a carbon monoxide radiometer is described and ... -
Further Consideration of Hayashi's “Dynamic Response of a Cup Anemometer”
(American Meteorological Society, 1990)No abstract available -
Effect of Irregularities in the Diameter Classification of Raindrops by the Joss-Waldvogel Disdrometer
(American Meteorological Society, 1990)The Joss-Waldvogel Disdrometer (JWD) is an electromechanical counter designed to measure raindrop size distributions for the purpose of calculating radar reflectivities. It has performed this function successfully for 20 ... -
A Portable Lidar Boundary-Layer Wind Profiling System
(American Meteorological Society, 1990)A rugged portable laser-ranging pilot balloon tracking system was developed to measure wind profiles in the boundary layer. The portable laser-ranging system provides digital output and can be operated by one relatively ... -
A Comparison of Optical Shadowgraph Instruments for Measuring Raindrop-Size Spectra
(American Meteorological Society, 1990)No abstract available -
Comparison of Rawinsonde and Wind Profiler Radar Measurements
(American Meteorological Society, 1990)Comparisons of horizontal wind component measurements from a rawinsonde and a UHF wind profiler radar, obtained twice daily over a period of nearly 2 years (from mid-January 1984 through October 1985), showed differences ... -
Using the Inverted Echo Sounder to Measure Vertical Profiles of Gulf Stream Temperature and Geostrophic Velocity
(American Meteorological Society, 1990)The methodology for converting the travel time measurement of the inverted echo sounder (IES) into an amplitude of the first baroclinic dynamical mode, A1, is presented. For a Gulf Stream IES record the so-generated A1(t) ... -
A Technique for Characterizing Surfactants on the Air–Sea Interface
(American Meteorological Society, 1990)An optical-electronic technique has been developed for simultaneous, remote measurements of the surface tension and wave attenuation over the water surface. The technique has been fully tested in a laboratory tank, and ... -
Instrumentation to Measure the Depth/Time Fluctuations in Acoustic Pulses Propagated through Arctic Internal Waves
(American Meteorological Society, 1990)Instrumentation for measuring the evolution of volume-scattered acoustic signals in both depth and time is described. Measurements were taken for 12 days during the spring of 1985 with transmitters and receivers suspended ... -
Efficient Dealiasing of Doppler Velocities Using Local Environment Constraints
(American Meteorological Society, 1990)A Doppler velocity dealiasing algorithm is described that processes one radial at a time by comparing that radial with a previous radial. This technique has worked reliably on numerous Doppler radar datasets for clear air, ... -
Propagation Effects on Reflectivity for Circularly Polarized S-Band Radars
(American Meteorological Society, 1990)The effect of the propagation medium on the measurements of the radar reflectivity factor for circularly polarized S-band radar is assessed using model storms. The results show that for convective cells, the propagation ...