Just remember to factor in the wind (probably convert to mph unless you
have a radar gun that works in knots). Radar gun will be measuring
ground speed, not airspeed.

EDR wrote:

As a followup posting to my "Why fly fast approaches?", I have an idea
for some evening entertainment.
Does anyone have an old police radar gun?
If Jay parks in the same area as last year, we can "grade" each
approach of arrivals based on their aircraft type and approach speed.
If someone brings a laptop, we can create a spreadsheet and develop
some realworld statistics about pilots and their approach speeds.