APPLICATION OF DOPPLER RADAR TO STORM DYNAMICS.
Final Scientific rept., Dec 63-Dec 66,
ALLIED RESEARCH ASSOCIATES INC CONCORD MASS ARACON GEOPHYSICS DIV
Pagination or Media Count:
The variance due to vertical wind shear is calculated for Doppler wind measurements using a realistic beam pattern. The effect of reflectivity changing with height is evaluated. The existence of horizontal wind shear is analyzed from measurements by Doppler radar in widespread precipitation. The method of determining wind velocity, divergence and deformation is summarized. By representing the distribution of precipitation fall speeds with a Gaussian function, rain intensity and liquid water content are determined as a function of the reflectivity, the mean fall velocity and the standard deviation. A case of sorting of a Marshall-Palmer drop size distribution is analyzed. Multigate Doppler observations in snow demonstrate the feasibility of measuring the translation, dimension and amplitude of microscale turbulence. Eddies at low levels have periods of about one minute and dimensions of 0.4 km. These increase at higher levels. Author
- Active and Passive Radar Detection and Equipment