The electrodynamics of sprites

[1] A balloon campaign was conducted in summer, 1999, to measure the stratospheric electromagnetic fields associated with sprites. The balloon payloads were instrumented with electric field detectors, magnetometers, an upward looking photometer, and other instruments. Ground observations for detection of sprites included low light level TV (LLTV) observations from three sites, Jelm Mt., Wyoming, Bear Mt., South Dakota, and Yucca Ridge, Colorado. Flight 3 of the campaign flew from Ottumwa, Iowa at 00: 39: 32 UTC to 11: 12: 00 UTC on 08/21/99. A sprite at 0955: 36.980 UTC produced a vertical electric field perturbation of similar to 0.275 V/m that was similar in time profile to the light emission. There was also a positive azimuthal magnetic pulse of similar to 3 nT.