Definition of pilot balloon in English:
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.
- 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.
Definition of pilot balloon in:
- British & World English dictionary