Sorry to here about the ticket, but I must say that PO radar is very accurate, all PO radar is accurate to +- 1kmph, and as like what was already mentioned going to court is most likely as waste of your time, however, you might bet on the chance that the PO's boss won't pay OT for traffic court, or that the judge will reduce your fine(feeling sorry for you), happens a lot up here. $200 American for a speeding ticket is like the fine for excessive speeding here in Canada ($350).
Case law dictates that a PO doesn't have to be a radar expert, only that he must have knowledge in the setup, testing and operation of the radar unit.