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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: The first simultaneous spectroscopic and monochromatic imaging observations of short-wavelength infrared aurora of \(\mathrm {N_{2}^{+}}\) Meinel (0,0) band at 1.1 \(\mathrm {\mu }\)m with incoherent scatter radar

Fig. 2

a 10 min averaged spectrum taken before the aurora intensification (blue) and spectrum taken at the peak of the aurora intensification (orange). b Nominal aurora spectrum (red, see details in the text) and spectrum created from convolutions of the observed \(\mathrm {N_{2}^{+}}\) (M) spectrum and the NIRAC filter transmittance functions (green)

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