There are, however, a couple of comments I would like to make to emphasize some of the challenges but also highlight some more capabilities and systems we have.
The requirements for a sensor system-of-systems in a network, is a very different thread.
The larger drones can be countered with the same types of systems that are used for normal air defense.
First of all, detection is a challenge, because the radar return from small drones are often hard to distinguish from noise e.g. birds, leaves on trees, ground clutter etc.
They simply confuse the return signal from the drones with noise and doesn't recognize it as a track.
New radars, with drone detection capabilities, are tuned to recognize drone signatures.
THAT is the main challenge with drone detection today: Getting the balance between detecting drones without false tracks optimized.
Small drone detection is a lot harder than it sounds!
Many interceptors are really expensive and drones are very cheap, so the cost-per-kill is very high.
Guns, lasers and directed energy are the most economically sound weapons for this mission