Communications: directive radio wave systems and devices (e.g. – Radar for meteorological use
Patent
1990-03-12
1991-06-25
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Radar for meteorological use
G01S 1395
Patent
active
050271229
ABSTRACT:
A method and apparatus for real time de-aliasing of the Doppler velocity data in a weather radar system by using a Process Radials routine which processes every valid range gate along a radar dwell by determining if each range gate is within the Nyquist velocity of either the average of four preceding range gates or data from a Windfield Model. To further enhance the de-aliasing process a Process Dual Scans routine is used prior to the Process Radial routine to de-alias velocity data by comparing velocity data from two scans of different pulse repetition frequencies. Subsequent to the Process Radials routine, a Minimize Azimuthal Shear routine checks velocity discontinuities from azimuth to azimuth. The de-aliased data is transferred to an Update Windfield Model routine for quality checks of the de-aliased velocity data and updating of the Windfield Model. This complete method of de-aliasing the velocity data is performed during the real time operation of the radar system.
REFERENCES:
Efficient Dealiasing of Doppler Velocities Using Local Environmental Constraints, Michael D. Eilts and Steven D. Smith, NOAA, Environmental Research Laboratories, National Severe Storms Laboratory, Norman, Okla., Technical Report Documentation, p. i, preface pp. iii-vii, pp. 2-37 (Jan. 1989).
Two-and Three-Dimensional De-aliasing of Doppler Radar Velocities, William R. Bergen and Steven C. Albers, Journal of Atmospheric and Oceanic Technology, American Meteorological Society 1988, vol. 5, pp. 305-319 (Apr. 1988).
De-Aliasing First-Moment Doppler Estimates, Peter S. Ray and Conrad Ziegler, Journal of Applied Meteorology, National Severe Storms Laboratory, Norman, Okla., May 1977, vol. 16, pp. 563-564.
Automatic Velocity De-Aliasing for Real-Time Applications, Mark W. Merritt, Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Mass., Sep. 1984, 22nd Conference on Radar Meteorology, pp. 528-533.
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Reducing the Effects of Doppler Radar Ambiguities, Larry Hennington, Journal of Applied Meteorology, National Service Storm Laboratory, Norman, Okla., 1981, pp. 1543-1546.
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The Simple Rectification to Cartesian Space of Folded Radial Velocities from Doppler Radar Sampling, L. Jay Miller, Carl G. Mohr and Andrew J. Weinheimer, Journal of Atmospheric and Oceanic Technology, National Center for Atmospheric Research, Boulder, Colo., vol. 3, Mar. 1986, pp. 162-174.
Barron Jr. Gilberto
Dawson Walter F.
Raytheon Company
Sharkansky Richard M.
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