Journal of Atmospheric and Oceanic Technology: Recent submissions
Now showing items 3521-3540 of 5084
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An Airborne Laser Air Motion Sensing System. Part II: Design Criteria and Measurement Possibilities
(American Meteorological Society, 1987)A conically scanning Doppler lidar technique for measuring air motions from an aircraft is proposed in the companion paper (Keeler et al.). A theoretical analysis of this technique shows that, assuming isotropic turbulence, ... -
An Airborne Laser Air Motion Sensing System. Part I: Concept and Preliminary Experiment
(American Meteorological Society, 1987)Measurement of air motion relative to an aircraft by a conically scanned optical Doppler technique has advantages over measurements with conventional gust probes for many applications. Advantages of the laser air motion ... -
The Design and Operation of a Microbarograph Array to Measure Pressure Drag on the Mesoscale
(American Meteorological Society, 1987)During the ALPEX field program, pressure was measured along three Alpine cross sections. In order to attain high accuracy, pressure sensors had to be protected against the influence of wind-induced dynamic pressure effects ... -
A Field Evaluation of NDBC Moored Buoy Winds
(American Meteorological Society, 1987)Several field intercomparisons of buoy winds were conducted to investigate the quality of the observations. Differences between dual anemometers on the same buoy were calculated during tropical cyclones. The speed and ... -
Comparison of Upper Ocean VACM and VMCM Observations in the Equatorial Pacific
(American Meteorological Society, 1987)Measurements from a Savonius rotor and vane vector-averaging current meter (VACM) and dual orthogonal propeller vector-measuring current meter (VMCM) placed 1 m apart beneath a surface-following buoy moored on the Pacific ... -
A Technique to Measure Entrainment in Cloud by Dual-Polarization Radar and Chaff
(American Meteorological Society, 1987)A new method for studying the entrainment of air into clouds has been developed and tested, and initial results demonstrating the technique are presented here. This new method is superior to other chaff techniques that ... -
Analysis Models for the Estimation of Oceanic Fields
(American Meteorological Society, 1987)A general model for statistically optimal estimates is presented for dealing with scalar, vector and multivariale datasets. The method deals with anisotropic fields and treats space and time dependence equivalently. Problems ... -
A 94-GHz Doppler Radar for Cloud Observations
(American Meteorological Society, 1987)A Doppler radar operating at 3.2 mm wavelength was designed and assembled primarily for observation of clouds and precipitation. Phase detection of the radar signals which is required for Doppler operation is implemented ... -
Scenario-Driven Automatic Pattern Recognition in Nowcasting
(American Meteorological Society, 1987)The purpose of this paper is to illustrate how the construction of a knowledge-based system (KBS) to support nowcasting, can be used to guide and facilitate the development of objective pattern recognition algorithms for ... -
METEOR: An Artificial Intelligence System for Convective Storm Forecasting
(American Meteorological Society, 1987)An experienced forecaster can use several different types of knowledge in forcing. First, there is his theoretical understanding of meteorology, which is well entrenched in current numerical models. A second type is his ... -
Recognizing Low-Altitude Wind Shear Hazards from Doppler Weather Radar: An Artificial Intelligence Approach
(American Meteorological Society, 1987)This paper describes an artificial intelligence-based approach for automated recognition of wind shear hazards. The design of a prototype system for recognizing low-attitude wind shear events from Doppler radar displays ... -
Artificial Intelligence—The Challenge and the Opportunity
(American Meteorological Society, 1987)tract -
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Comment on “Comparison of Radar and Navaid Windfinding Systems”
(American Meteorological Society, 1986)No abstract available. -
The Determination of Sky View-Factors in Urban Environments Using Video Imagery
(American Meteorological Society, 1986)A technique is described whereby sky view-factors may be determined using a video camera equipped with a fish-eye lens. The video image is digitized and then analyzed to distinguish between ?sky? and ?non-sky? pixels. ... -
Surface Sampling of a Snowstorm by a 2D-C Probe with and without Aspiration
(American Meteorological Society, 1986)A 2D-C probe was mounted on the front of a truck for operation in a horizontal orientation, as on an aircraft, and also in a vertical orientation using an aspirator. A snowstorm with calm conditions was sampled by alternatively ... -
Calibrating an Altimeter: How Many Tide Gauges Is Enough?
(American Meteorological Society, 1986)The dominant contributor to the random error of an altimetric satellite system is the long wavelength uncertainty in the orbital radius. It is shown that calibration by a comparatively modest tide gauge system can drastically ... -
On Irradiance Measurement Errors at Sea Due to Tilt of Pyranometers
(American Meteorological Society, 1986)Calculations are made of errors in the measurement of solar irradiance at the sea surface. which occur when pyranometers are tilled. Tilts due to buoy or ship motion caused by wave action or a preferential tilt due to drag ...