Problem	“National” or “My subjective” rating 	
Vertical reflectivity profile		
Attenuation by precip. 		
Total beam overshooting 		
Sea clutter		
Ground clutter		
AP clutter		
Hail		
Propagation changes		
Beam blockage		
Gauge adjustment		
Radar siting		
Suboptimal compositing algorithms		
Availability of polar data		
Orographic enhancement and lee effects		
Hardware		
Absence of metadata		
Meteorological algorithms		
Data assimilation to models		
Birds		
Overhanging precipitation		
Interfering emitters, jamming		
Wet radome attenuation		
Attenuation by icy, sleety, salty or dirty radome		
Infrastructure: electricity, tower structure		
Water phase		
Miscalibration		
Pointing error (elevation)		
Z (R, S)		
Ships		
Scan strategy		
Second trips
(Cb + AP)		
Sidelobes		
Chaff		
Windmills		
Dry radome attn		
Attn. by gases		
Attn. by clouds		
Insects		
Sun		
Specular reflections (Neighbours)		
Forest fires, volcanic ash		
Bragg scattering from clear air		
Clouds		
Aircraft in noise samples		
Flare echo