By Joan Bech; Jorge Luis Chau
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Extra resources for Doppler radar observations : weather radar, wind profiler, ionospheric radar, and other advanced applications
The processing is called adaptive pseudowhitening. It requires initial estimates of SNR and spectrum width. 12, and caption). The gradient of Doppler velocities (indicated with an arrow) is at the interface of the storms outflow and the environmental flow. This type of discontinuity is the key feature detected by algorithms for locating gust fronts and quantifying wind shear across the boundary; such information is extremely useful for air traffic management and safety at airports. In contrast to whitening techniques pulse compression does not degrade the SNR (Doviak and Zrnic, 2006) but is not considered due to excessive bandwidth and current hardware constraints.
The characteristics and proportion of severe weather is climatologically or geographically dependent. S. whereas the tallest thunderstorms are found in Argentina (Zipser et al, 2006). Warning services developed at National Hydrological and Meteorological Services (NHMS) often originate because of a particular damaging severe weather event and ensuing expectations of the public. Office organization, resources and expertise are critical considerations in the use of radar for the preparation of severe weather warnings.
Severe Weather Criteria in Canada: Heavy Rainfall Warning Weather Centre Newfoundland Maritimes Quebec Ontario Prairie Alberta Arctic Yukon Pacific Warning Criteria 75 km/h and/or gusts of 100 km/h 65 km/h and/or gusts to 90 km/h 50 km/h with gusts to 90 km/h or with only gust to 90 km/h 60 km/h for 3 hours, or gusts of 90 km/h for 3 hrs 60 km/h and/or gusts to 90 km/h for 1 hr 60 km/h or gusts to 100 km/h except in Lethbridge Region: 70 km/h or gusts to 120 km/h. C. 65 km/h or gusts of 90 km/h Table 4.
Doppler radar observations : weather radar, wind profiler, ionospheric radar, and other advanced applications by Joan Bech; Jorge Luis Chau