Probably not. Cop said it, court saw it written, that settles it. Now prove your innocence without the ability to face your accuser. They're a cop, of course they're 100% correct in everything they wrote down, so... yeah, pay your ticket.
I've seen this a few more times than I'm the slightest fan of, for me and other people accused of "impossible things" in cars (like "being clocked far faster than the car is capable of having accelerated to based on where it turned onto the road").
The prosecution has no problems with, "But the cop wrote that they saw you doing 70 in a 35, wrote the ticket for 45, and they're not here, so you're guilty."
The proper analogy is to say that this company is not allowing for the experience and training testimony to be shown to the court. That would be how I would argue against probable cause in this case. However, as another comment in the thread discusses, this is probably not an issue since there is a heavy dose of parallel construction argument going on.