NUV/Blue Spectral Observations of Sprites in the 320-460 nm Region: N2 (2PG) Emissions
Abstract
A near-ultraviolet (NUV) spectrograph (320-460 nm) was flown on the EXL98 aircraft sprite observation campaign during July 1998. In this wavelength range video rate (60 fields/sec) spectrographic observations found the NUV/blue emissions to be predominantly N2(2PG). The negligible level of N+2 (1NG) present in the spectrum is confirmed by observations of a co-aligned, narrowly filtered 427.8 nm imager and is in agreement with previous ground-based filtered photometer observations. The synthetic spectral fit to the observations indicates a characteristic energy of 1.8 eV, in agreement with our other NUV observations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 2010
- Accession Number
- ADA522860
Entities
People
- C. L. Siefring
- D. D. Sentman
- D. R. Moudry
- E. J. Bucsela
- E. M. Wescott
- J. S. Morrill
- M. J. Heavner
Organizations
- United States Naval Research Laboratory