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RISA Direct Method for Deriving Drop-Size Distribution and Vertical Air Velocities from VHF Doppler Radar Spectra
Publisher: American Meteorological Society
Abstract: In precipitation environments, sensitive VHF Doppler radars have a capability to detect echoes from both refractive index irregularities and precipitation particles. The purpose of this paper is to propose a direct method ...
Further Discussion on Deriving Drop-Size Distribution and Vertical Air Velocities Directly from VHF Doppler Radar Spectra
Publisher: American Meteorological Society
Abstract: Raindrop size distribution and vertical air velocity are directly derived from VHF Doppler radar spectra in precipitation environments. As was first proposed by Wakasugi et al., we use a least-squares fitting parametric ...
Observations of Tropospheric Temperature Fluctuations with the MU Radar-RASS
Publisher: American Meteorological Society
Abstract: Applying the RASS (radio acoustic sounding system) technique to the MU (middle and upper atmosphere) radar, profiles of both temperature and wind velocity were observed every 90 s in the height range of about 1.5?7.0 km, ...
An Improved High-Resolution Processing Method for a Frequency Domain Interferometric Imaging (FII) Technique
Publisher: American Meteorological Society
Abstract: Frequency hopping [also recently called range imaging (RIM) or frequency domain interferometric imaging (FII)] is a pulse compression technique used to improve the range resolution ?r of Doppler radars limited by their ...
Fine Structure of Vertical Motion in the Stratiform Precipitation Region Observed by a VHF Doppler Radar Installed in Sumatra, Indonesia
Publisher: American Meteorological Society
Abstract: Vertical motion W profiles in the stratiform precipitation region of mesoscale cloud clusters were investigated using wind data observed by VHF Doppler radar installed in western Sumatra Island (0.2°S, 100.32°E). A special ...
Observational Evidence of a Saturated Gravity Wave Spectrum in the Troposphere and Lower Stratosphere
Publisher: American Meteorological Society
Abstract: Radial velocity and temperature data obtained at the MU Radar Observatory during October and November 1986 are used to examine the character of the motion spectrum in the troposphere and lower stratosphere. It is found ...
Winds Measured by a UHF Doppler Radar and Rawinsondes: Comparisons Made on Twenty-Six Days (August-September 1977) at Arecibo, Puerto Rico
Publisher: American Meteorological Society
Abstract: Vertical profiles of horizontal winds in the lower stratosphere and upper troposphere were measured by the UHF Doppler radar at Arecibo, Puerto Rico (18.35°N, 66.75°W) on 26 days in August and September 1977. On comparing ...
Moving Cellular Structure of Fog Echoes Obtained with a Millimeter-Wave Scanning Doppler Radar at Kushiro, Japan
Publisher: American Meteorological Society
Abstract: Observations of fogs with a millimeter-wave scanning Doppler radar were conducted at Kushiro in Hokkaido, Japan, in the summer seasons of 1999 and 2000. Three typical types of plan position indicator (PPI) displays were ...
VHF Doppler Radar Determination of the Momentum Flux in the Upper Troposphere and Lower Stratosphere: Comparison between the Three- and Four-Beam Methods
Publisher: American Meteorological Society
Abstract: The vertical flux of horizontal momentum in the upper troposphere and lower stratosphere can be measured by VHF Doppler radars using the mesosphere-stratosphere-troposphere (MST) radar technique. Two methods have been used: ...
Radar Measurement of Tidal Winds at Stratospheric Heights over Arecibo
Publisher: American Meteorological Society
Abstract: Wind oscillations of tidal periods that showed a marked downward phase progression were detected at the lower stratosphere using the Arecibo radar. The amplitudes of 1?5 m s?1 were inferred for both diurnal and semidiurnal ...