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Timing a car between markers isn't admissible evidence of speeding under California law. https://www.shouselaw.com/ca/defense/vehicle-code/40801/ https://www.sh

• throwawaylinux 4y ago
  That explains it, thank you. I guess the reason for not using GPS or other instruments for ground speed is also legislation?
  • travisjungroth 4y ago
    That one doesn't make any sense to me. The helicopter would certainly have ground speed via GPS. I don't get how you couldn't use that. A car can use its speedometer. I remember seeing a laser pod on the wing of a CHP airplane and talking to them about it, but it was a long time ago and I couldn't confirm it more than finding pictures that show the pod (but maybe it's a camera). Based on my experiences involving journalism and aviation, it is extremely possible that the author incorrectly described what the pilot was doing.