I'd advise people to disregard the above quoted. It is wholly wrong on several points. I speak from years of experience operating several different types of medium / long range air defence radars,associated command systems and datalinks. The bread & butter is in the "blips" - the track idents come afterwards in many cases. I could go on but that would be a bit naughty.
Thank you very much. I did work as Track Monitor and Identification Officer. You would not be able to recognize a 'blip' on a screen unless it is already assigned as valid track. For this you need valid returns. I know my work, not sure about yours.
I am sure you could go on a bit. So could I!