The Doppler Sodar Remtech PA1 is a commercial Sodar that can measure, besides the atmospheric backscatter of the emitted signal, also the three-component wind speed vertical profile, calculated by the Doppler shift of the backscattered echo.

The antenna is a ‘phased array’ type, with just one low weight portable  antenna element instead of three (one for each wind component). It uses also a multi-frequency emitted signal. This allows to obtain measurements up to about 1 km height in favourable conditions  with low acoustic power (1 Watt), by means of cross validations of the Doppler shift peaks on the different emitted frequencies by an automated analysis system of the backscattered signal.

However, for the characteristics of the ‘phased array antenna’, that cannot focus on a small air volume element, and for the automated ‘black-box’ data acquisition and validation, the system is more suitable for long term monitoring of wind profiles than for research data analysis.