We propose to demonstrate the ability to map electric fields in clouds not producing lightning by using dual polarization radar, a technique we demonstrated in 1991 at Kennedy Space Center. This technique utilizes behavior of the large ice-crystal population in a thunderstorm as an indicator of electric fields: ice crystals become aligned with the electric field when the field is sufficiently strong. Dual-polarization radar can detect the degree and direction of alignment.We will develop an economical strategy for adding an electrification hazard detection modification to existing surface-based and airborne weather radars. The ability of existing radars to evaluate storm lightning potential would offer a significant enhancement in margin of safety to aircraft operations, missile launches, explosives handling, and recreational activities. Providing airline pilots with the capability to accurately predict the development of regions of intense electrical and convective activity will further improve safety and comfort for the traveling public.
