I am retrieving winds from KVNX and KICT using PyDDA. The magnitude of the vertical velocity maximizes right near the axis between the radars and decreases with distance in what seems to be an unphysical manner. Do you have any suggestions on what could be causing this or how to resolve it? I am using tensorflow and Co and Cm = 1; the resolution is 0.5 km vertically and horizontally. A plot of the vertical velocities at 4.5 km is shown below.
@rcjackson@mgrover1 There are some pre-operational HRRR runs for our case. The runs initialize hourly and run out 15 hrs. For retrieval purposes, I assume we would want HRRR runs that initialize closest to our time of interest. Is that correct?
Yes, I would use the runs that initialize closest to the time of interest. The HRRR assimilates NEXRAD observations into its initialization while the rest of the time periods would be prognosed from that initialization. Therefore, we would expect the initialization (0h) step to be most representative of the storm.