Uhmmm… I am not an expert, but what if use a second drone, one for TX and one for RX? Isn’t it just what IceEye does in the space with satellites? With GPS based time synchronization this could not only be feasible but at least decrease the noise floor from lack of TX-RX leakage. Would it also increase the angular resolution? Any other benefits?

After I read this, I thought it would be really cool to try to make this myself. But then I realized I’m barely able to get a simple circuit working much less one that involves complex RF signalling.