Cited for VC 22356 b in CA.

I received a speeding ticket recently while I was traveling southbound on the I-5 in CA. When I got pulled over the officer immediately said he got me going at 97 mph in a 70 mph. I was not going at this speed, the max speed I hit was 80 mph and there was traffic in front of me to prevent me from traveling at the 97 mph he claims. Anyway, I'm always very careful and was scanning the roadway for CHP units. Because the I-5 is flat, I had a clear view of both sides of the road for miles and no CHP car was in sight. There was no aircraft or overpass where another unit could hide. I also scan behind me by using my rearview mirror and there were no cars within a couple miles of me. A few min later I see a CHP behind me and about a min later he puts on his lights and pulls me over. I was driving at around 63 mph due to traffic at the time I saw him approaching my car. I believe that he was traveling (not situated) in the northbound direction and crossed the grass median to travel southbound and come after me. I was frazzled and did not ask him how he clocked my speed and tried to ask for a warning based on my 14 year record of no tickets and no warnings. He refused and was belligerent and condescending. He said the ticket would cost over $300. He told me I had to show up to court even though I live over 100 miles away from the courthouse and did not tell me about my option to do a trial by written declaration, but I read about it on the back of my ticket. Is it possible for me to ask for a dismissal based on my 14 year clean record or have it reduced to a warning or anything like that?? If not, what are some good options for when I submit my trial by written declaration statement. I have no idea how he clocked the speed, but I know it cannot be accurate.