CommentsAdd a comment
The modules I have played with have been doppler radar sensors so can only detect the speed of the object and not the distance. Most have a range of about 30m and I did see some at 100m, but nothing approaching 1000m.
If you want to measure distance then that's a very different scenario as I believe you then need time of flight devices, you may find some suitable devices for the autonomous vehicle developments and I found this by Bill Marshall which is interesting.
https://www.rs-online.com/designspark/lidar-radar-digital-cameras-the-eyes-of-autonomous-vehicles but even here nothing approaching your proposed range.