All you can do is present your testimimony, your evidence (e.g. date log), and side of the story as you presented it here--but expect that you will most likely lose anyway. It comes down to credibiity: you have an obvious bias or agenda--avoid a fine and points. The officer, on the face of things, does not: he has nothing to gain from your ticket. He is neutral; you are biased. He is sworn to uphold the law; you are not. He is a trained observer; you are not. Not surprisingly, the police overwhelmingly believe the police officers, not the people they ticket.