What is the typical radar beamwidth in degrees?

Radar is essentially a detection system based on distance measurement, easy to obtain high distance resolution, azimuthal resolution is relatively poor. Azimuth resolution is determined by the beam width of the radar antenna, the general ground-based radar beam width of zero degrees to a few degrees to a narrower beam, for example, set the antenna beam width is equal to 0.01 radians (i.e., about 0.57 °), it is at a distance of 50 kilometers at the lateral resolution of about 500 meters, obviously far from meeting the requirements of the scene imaging. Need to greatly improve the azimuthal resolution, that is, the beamwidth for large compression.