Originally posted by Greg Stumpf+--><div class='quotetop'>QUOTE(Greg Stumpf)</div>
Been working on my mobile mesonet today, so far here's what I've gotten so far.
The placement of your anemometer won't work. It is way too close to the vehicle chassis to get an accurate reading. You will be measuring air speed within the compressed airflow about the car -
even if the vehicle is stationary (just think "wind tunnel"). In most situations, your measured wind speed will be an overestimate of the true wind.
NSSL engineers obtained information about the windflow about the vehicles that they mounted the mobile mesonets on. They found that the wind equipment had to be mounted pretty far away from the chassis in order to be effectively out of the vehicle airflow envelope. In later designs, this was about 3 feet high and 2 feet forward of the top side of the windshield.
Also, please strongly consider a weather logging system - make your observations useful to the rest of the community, either via post event logs, or via real-time reports to the NWS.
Greg Stumpf, Norman, OK[/b]