The frontal area for the antenna is only a couple of inches, which will govern the wavelength of the radar waves, which will govern how useful they are for detecting or penetrating cloud, aircraft, rocks etc.
The rotation rate of 5 per second is pretty fast and will govern the range of the radar (short), though I suppose it is only for really close-in stuff. There will also be doppler shift to deal with, as the antenna is not fixed.