Acoustic tomography is a method of measuring wind fields by making multiple simultaneous samples of the wind field from different directions using sound, and then finding the single wind field that best fits those observations. Acoustic tomography systems simultaneously measure velocity and temperature. Originally used for measuring currents in the ocean on mesoscales, acoustic tomography has since been applied to the atmosphere and extended into multiple dimensions and different scales (Barth and Raabe 2011; Holstein et al. 2004). Ostashev et al. (2009) provides a useful summary of measurements in the atmospheric boundary layer and demonstrates the ability to measure winds in an 80-m square grid with errors of less than 10%, temporal resolution of 1.5 s, and horizontal resolution of a few meters, albeit it in a plane a few meters thick. Acoustic tomography in the atmosphere has not been commercialized and should be considered a TRL of 6.
Acoustic Tomography has a TRL of 6.