NCAR's CP-2 Doppler radar in 1983 during Project MAYPOLE (May Polarization Experiment). In this joint experiment, scientists with NCAR and Ohio State and Colorado State Universities modified the CP-2 radar to perform dual-polarization measurements and tested the new radar technique over a six-week period. For more information: http://n2t.net/ark:/85065/d7cz35xh