Advanced Technology Demonstrator

Advanced Technology Demonstrator (ATD) is an individual experimental weather radar in Norman, Oklahoma, using s-band phased array technology seeking to enhance phased array capabilities with the addition of dual-polarity and pulse compression. Its predecessor, MPAR, was the first large-scale PAR experiment taken on by NOAA in 2003, and was deployed until its eventual decommission in favor of ATD in 2016.

Source: Wikipedia — Advanced Technology Demonstrator (CC BY-SA 4.0)