GEMPAK Users,
I'm wondering if anyone has information about these radar beam artifacts?
http://www.unidata.ucar.edu/staff/mjames/gempak/n0q.gif
They're present in both N0R and N0Q products, but seem to be occuring
more recently. It's less of a nuisance for N0R due to low dBZ
thresholding and limited range, but their presence in the N0Q national
composite is unwelcome. These anomalous returns are constant in time
and the reflectivity values seem to increase linearly with range/height
(you can check n0r and n0q for JAX and GRR in NMAP2 to see for
yourself). They appear less frequently in higher tilts, so perhaps
they're a result of beam ducting?
Other thoughts?
Michael James
Unidata
