Blue-light imagery and photometry of sprites

Details Blue-light imagery and photometry of sprites Blue-light imagery and photometry of sprites

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jastp..60..801s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 60, Issue 7-9, p. 801-809.

Physics

29

Scientific paper

We have obtained blue (350-475 nm) video images and simultaneous high-time resolution narrow-band blue (415-435 nm) photometry records of four sprite events. The brightest blue images show a sustained tendril geometry and a nearly constant intensity of emission over the entire vertical extent of the sprite (from 35-90 km altitude). Photometer light curves display an exponential decay with a 0.3 ms time constant, a FWHM on the order of 0.1-1.0 ms, and are probably dominated by 427.8 nm (N+2 1N) emission. The data support the observations of[Armstrong et al. (1998)] and support the contention that significant ionization occurs during sprite generation.

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