Unrealistic velocity corrections
Opened this issue · 5 comments
Hi!
I had contacted @vlouf earlier regarding unrealistic velocity corrections performed on a sample tropical cyclone data. (SAMPLES ATTACHED).
I am using data from a C-band radar at a Tropical Station, with obvious velocity aliasing. Following is a code snippet.
`
###select only dprf files###
if mode == "dprf" and num_bins == 1600 and num_elev == 11 and az.size==3960:
radar = convert_to_pyart(sortedfiles[i])
velcor = unravel.unravel_3D_pyart(radar, velname='VEL', dbzname='DBZ', nyquist_velocity=8.0)
`
The input data looks quite noisy, Unravel might not work very well here. What I don't understand is that there's part without any data south to the center that is absent from the dealiased data. Has the noise been filtered out of the DBZ field?
No scatterer in the eye of the cyclone is normal, the problem is why the output (badly) dealiased velocity shows data where there should be none.
Yes, despeckeling the data is a good thing.
Here my comments:
#8 (comment)