Diagnosis of lightning return stroke channel temperature according to different band spectra

The spectral data of a lightning discharge process are captured by high-speed slit-less grating spectrograph. Based on the plasma spectrum theory, return stroke channel temperature is estimated according to information different bands. results show that average temperatures Boltzmann plot method 43270, 17660 and 17730 K, respectively, when line group single ionized nitrogen atom (NII), neutral oxygen (OI) (NI) selected respectively. 24770 which based Saha-Boltzmann using NII NI groups. corona sheath model radiation it can be inferred obtained only should core, or OI around core. Using both groups, entire section (including core sheath) in exposure time.