Since 1977, EMA® has been developing and providing technologies and services to promote the design, certification and performance of safety- and mission-critical systems. EMA® was founded by David Meriwether and Rod Perala. In its early years, EMA® focused on the effects of nuclear weapon induced ionizing and non ionizing (Nuclear Electromagnetic Pulse) radiation on a wide variety of military and civilian systems, as well as lightning effects upon systems.
https://www.ema3d.com/