Evaluation of the Watchdog Weather Station to Reduce Drift from MDOT Spray Trucks

Wind speed data collected with the Spectrum Watchdog Sprayer Station were compared to data recorded with a Young 05103-5 anemometer at the Rodney R. Foil Plant Science Research Center on the Mississippi State University campus June and July, 2014 and 2015. The manufacturer’s specifications advertise the Sprayer Station wind speed accuracy for wind speeds less than 12 mph is +1.1 mph and wind speeds greater than 12 mph is +2.3 mph. While the wind speed data recorded by the Watchdog Sprayer Station followed the same trend as the data recorded with the Young anemometer, variations in wind speed both above and below that recorded by the Young anemometer indicate the Watchdog precision is not sufficiently reliable of the actual wind speed. Wind speed data recorded by the Young anemometer and Watchdog Sprayer Stations were poorly correlated at 0.61 and 0.49 for collection periods in 2014 and 2015, respectively. These data indicate the Watchdog Sprayer Station does not measure wind speed with sufficient reliability to provide a Mississippi Department of Transportation (MDOT) spray truck driver, a true indication when wind speeds are above or below safe parameters for spray applications to avoid drift.

  • Supplemental Notes:
    • This report was done in cooperation with the US Department of Transportation Federal Highway Administration (FHWA). MDOT final research reports are available at http://mdot.ms.gov/portal/research.aspx?open=Reports.


  • English


  • Status: Completed
  • Sponsor Organizations:

    Mississippi Department of Transportation

    401 North West Street, P.O. Box 1850
    Jackson, MS  United States  39215-1850

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Performing Organizations:

    Mississippi State University, Mississippi State

    P.O. Box 9542
    Mississippi State, MS  United States  39762
  • Principal Investigators:

    Byrd, John

  • Start Date: 20130923
  • Expected Completion Date: 0
  • Actual Completion Date: 20150930
  • Source Data: State Study 262

Subject/Index Terms

Filing Info

  • Accession Number: 01668390
  • Record Type: Research project
  • Source Agency: Mississippi Department of Transportation
  • Files: RIP, STATEDOT
  • Created Date: May 3 2018 9:58AM