El Segundo, CA:
I led development of the 1st laser-designated missile warning receiver for aircraft. We called it the “oh shit” sensor, because it told a helicopter pilot that a laser-guided missile was 2 seconds away, but the helo had no defense mechanisms to do anything about it.
It was a very cool sensor that could detect laser radiation over a hemispherical field of view, which was no easy task in the day when the imaging device was a refrigerated one pixel detector, not a CCD array.