You should mail out a "Request for Discovery" letter to the ticket-writing officer. In this letter - which you send before your court date - you ask any question you may have to prepare for your defense. The last time I fought a speeding ticket, I sent the officer a two-page RFD with about 7 questions. He never responded (I forget if they are legally bound to do so). However, before the case even began, the magistrate offered me a non-point violation in substitute for the 21mph-over speeding ticket. I think my RFD had something to do with it because before I was called into the "court room" the magistrate talked to the officer behind closed doors and I'm sure the cop said "this person is going to put up a fight, let's cut a deal quick so we can get this over with." Speculation, of course, but I did avoid the speeding ticket.
In the RFD, you can request copies of the officer's radar operation certification, records of the radar's calibration, where the squad car was located, what position it faced (for angles and such). Speeding tickets p!ss me off, so I recommend sending the RFD just to hassle the cops a little...and if you are truly not guilty, you need all the information you can get to avoid a false conviction. It's your legal right, just as pleading not-guilty is your legal right.