Definition of pilot balloon in English:

pilot balloon

noun

  • A small meteorological balloon used to track air currents.

    • ‘Wind measurements were performed every 4 hours by tracking the ascent of a pilot balloon by radar.’
    • ‘This computes a vertical profile of wind direction and speed given the radio telemetry observations of a pilot balloon.’
    • ‘In addition to the tethered Skyhooks, Gildenberg would release small pilot balloons to measure wind speeds during the experiments.’
    • ‘With the growth of aviation activity in the country, pilot balloon observations were started in 1928 to generate daily upper air wind data for pilots.’