yup. the radar in my car is a 2X which means i can clock people in front and behind me at the same time.
also the radar can read you closing speed (coming at you) or away speed.
and like you found out can do it mobile or stationary.
its never a good day when you get a ticket and all the advise i can offer you is to be repectful and honest and see what happens. cops and judges are people too so we do have a soft side.
that is unless you got stopped by robocop.
cheer up buddy. smoke a cigar and lets put the past behind.