I think the MDT's CHP uses run off cellular networks so it should be just some type of aircard in the laptop.I would hope that they're not just for decoration. The antenna with the large loading coil in the center is obviously the main low band antenna. The hockey puck is GPS. I'm curious about the mag mount with the cable stretched across the roof. The trunk lip mount is probably for 460 channels. The antenna in front of the GPS is probably for the 700Mhz extender. Of the other two, one could be for a 150Mhz extender. There could also be a scanner antenna. The are also MDT's that would need an antenna.
Those are my best guesses.