Speed Measuring Device (SMD) vs Aircraft

[Lilone168]

My question involves a speeding ticket from the State of: Washington. I was headed east bound on I-90 near ellensburg, I noticed I was doing about 77 in a 70 so I slowed down and set my cruise at 70. About 5-8 miles later I pass a cop sitting on top of an overpass, facing in the direction of traffic flow, and as I pass he turns his lights on and proceeds to pull me over. He told me I was monitored by AIRCRAFT doing 85 in a 70. I never remember going that fast. So of course he gave me the ticket, however when he wrote the ticket instead of checking aircraft he checked SMD. I know for a fact I wasn't going 85 when I passed him by that overpass. I have asked for a hearing date, however my reply will be done by letter form as I'm overseas and can't make it back. Is there anything I can put in my reply about that? Why wouldn't he put aircraft? Is that something big enough to get the ticket tossed?? any help is greatly appreciated!

[Mr. Knowitall]

Read the thread on discovery in Washington ticket cases. The answer to discovery will help you determine how your speed was measured and possible defenses.