Storm chasers Bill Harding and soon-to-be ex-wife Jo Harding engineer a plan to launch hundreds of data sensor/transmitters up into the funnel of a tornado, but to do so, they have to plant a 'Dorothy' instrument package right in a big one's path.
Hero sensor ball, consisting of clear and silvered acrylic hemispheres fastened by a metal bolt, encasing a printed circuit with flashing red and green status lights, with attached thin rubber whip 'antenna'. Illumination is toggled on and off by slightly twisting the top hemisphere.
From ScreenUsed.
