Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 4001-4020 of 5084
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A 50-MHz Logarithmic Amplifier for Use in Lidar Measurements
(American Meteorological Society, 2002)A high-speed logarithmic amplifier that has been successfully used to improve the dynamic range of a scanning lidar is described. The amplifier incorporates built-in baseline correction and calibration circuits, allowing ... -
Microburst Detection Using Agent Networks
(American Meteorological Society, 2002)Automatic detection of microbursts with Doppler radar data is an interesting challenge. Traditionally, manual detection is performed by trained meteorologists who scan through the volumetric radar data for appropriate ... -
A Methodology for Estimating the Parameters of a Gamma Raindrop Size Distribution Model from Polarimetric Radar Data: Application to a Squall-Line Event from the TRMM/Brazil Campaign
(American Meteorological Society, 2002)A methodology is proposed for estimating the parameters of a gamma raindrop size distribution model from radar measurements of Zh, Zdr, and Kdp at S band. Previously developed algorithms by Gorgucci et al. are extended to ... -
Scanning the Earth's Limb from a High-Altitude Balloon: The Development and Flight of a New Balloon-Based Pointing System
(American Meteorological Society, 2002)The development and first flight of a new balloon-borne pointing system is discussed. The system is capable of pointing a platform of optical instruments at an inertial target from a pendulating platform suspended below a ... -
Alignment of fee Crystals due to Transient Electric Fields
(American Meteorological Society, 1986)The alignment of columnar ice crystals due to the electric field surrounding a moving charged object, such as an aircraft, is modeled. The model allows the conditions of charge, velocity, ambient electric field, and size ... -
Two-Dimensional Video Disdrometer: A Description
(American Meteorological Society, 2002)This paper describes the design and operation of a two-dimensional video disdrometer (2DVD) for in situ measurements of precipitation drop size distribution. The instrument records orthogonal image projections of raindrops ... -
Using MODIS to Estimate Cloud Contamination of the AVHRR Data Record
(American Meteorological Society, 2002)A study of the improvement in cloud-masking capability of data from a Moderate Resolution Imaging Spectroradiometer (MODIS) relative to data from an Advanced Very High Resolution Radiometer (AVHRR) is performed. MODIS ... -
Optoelectronic Simulation of the PMS 260X Optical Array Probe and Application to Drizzle in a Marine Stratocumulus
(American Meteorological Society, 2002)Measurement of drizzle drop sizes and concentrations are often made using optical probes with linear arrays. Their accuracy is affected by both diffraction of light and response times of the electronics connected to the ... -
Use of the Vorticity Equation in Dual-Doppler Analysis of the Vertical Velocity Field
(American Meteorological Society, 2002)The anelastic vertical vorticity equation is imposed as a flow constraint in dual-Doppler wind analysis techniques, with emphasis on improving retrievals of the vertical velocity field. Several new techniques in which the ... -
Editorial
(American Meteorological Society, 2002) -
Effects of Unresolved High-Frequency Signals in Altimeter Records Inferred from Tide Gauge Data
(American Meteorological Society, 2002)Rapid sea level signals are poorly resolved, or ?aliased,? by the TOPEX/Poseidon altimeter, due to its ?10-day repeat cycle (Nyquist period TN ? 20 days). To assess the potential for temporal aliasing in the altimeter data, ... -
A Reduced-Order Information Filter for Multilayer Shallow-Water Models: Profiling and Assimilation of Sea Surface Height
(American Meteorological Society, 2002)A reduced-order information filter (ROIF) for the Miami Isopycnal Coordinate Ocean Model (MICOM) is implemented for assimilation of the TOPEX/Poseidon sea surface height (SSH) data. ROIF is an approximate Kalman filter ... -
An Evaluation of Above- and In-Water Methods for Determining Water-Leaving Radiances
(American Meteorological Society, 2002)A high-quality dataset collected at an oceanographic tower was used to compare water-leaving radiances derived from simultaneous above- and in-water optical measurements. The former involved two different above-water systems ... -
Parallax Errors and Corrections for Dual-Antenna Millimeter-Wave Cloud Radars
(American Meteorological Society, 2002)Dual-antenna radar designs avoid using a transmit/receive switch. In order to measure radar reflectivity accurately and to avoid a general decrease in system sensitivity, these systems require precise alignment of their ... -
Near-Field Reflectivity and Antenna Boresight Gain Corrections for Millimeter-Wave Atmospheric Radars
(American Meteorological Society, 2002)Millimeter-wavelength (MMW) cloud radars operating at Ka band (35 GHz) and W band (95 GHz) are popular atmospheric research tools because they are compact, have low prime power requirements, and are highly sensitive to ... -
Drag Coefficients of Oceanographic Mooring Components
(American Meteorological Society, 1986)The inclination of oceanographic mooring lines due to current drag causes errors in time series observations of currents and temperatures. The prediction of this effect requires knowledge of the drag coefficients for the ... -
Atmospheric Liquid Water Retrieval Using a Gated Experts Neural Network
(American Meteorological Society, 2002)Gated experts (GE) neural networks have been developed in order to retrieve atmospheric liquid water content over ocean from radiometer data. Gated experts neural networks are statistical models, which can model any general ... -
A Unified Formalism of Incoherent, Quasi-coherent, and Coherent Correlation Signals on Pulse-Pair Doppler Operation for a Cloud-Profiling Radar: Aiming for a Space Mission
(American Meteorological Society, 2002)The correlation signals of the incoherent, quasi-coherent, and coherent backscatterings from clouds have been analytically calculated from a unified formalism based on the Eulerian description for a generic weather radar ... -
Full-Time, Eye-Safe Cloud and Aerosol Lidar Observation at Atmospheric Radiation Measurement Program Sites: Instruments and Data Processing
(American Meteorological Society, 2002)Atmospheric radiative forcing, surface radiation budget, and top-of-the-atmosphere radiance interpretation involve knowledge of the vertical height structure of overlying cloud and aerosol layers. During the last decade, ... -
Application of the SZ Phase Code to Mitigate Range–Velocity Ambiguities in Weather Radars
(American Meteorological Society, 2002)It has been demonstrated through simulations that the SZ phase code method of mitigating range ambiguities has a performance that exceeds any other known phase-coding scheme. This paper describes an implementation of this ...