期刊
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
卷 115, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2009JA014858
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资金
- NASA [NAG5-5125, NAG5-5019, NAG5-5172]
- ONR
- NRL
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 and blue emissions to be predominantly N-2 (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 similar to 1.8 eV, in agreement with our other NUV observations.
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