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Table 1 Spectrometer wavelength bands

From: Universat-SOCRAT multi-satellite project to study TLEs and TGFs

#

Wavelength (nm)

Comment

1.

240–400

UFS1, UFS2, KS11 filters for comparison with MSU experiments (Tatiana-1, Tataina-2, and Vernov)

2.

270–380

 

3.

>  600

 

4.

762.7

TLE marker—atomic oxygen absorption line

5.

777.4

Lightning marker—the brightest line in lightning spectrum, used for lightning detection in LIS ((Orville and Henderson 1984)) and convergence ((Sharkov et al. 2018)) experiments

6.

500.1

Lightning marker—bright line in lightning spectrum and absent in sprite spectrum ((Milikh et al. 1998))

7.

337

N22P line—marker of low latitude and should absent in lightning spectrum due to ISUAL data

8.

391.4

N\(_{2}^{+}\)1N—line of ionized atomic nitrogen

9.

427.8

N\(_{2}^{+}\)1N present in aurora light and marker of ionization source (energetic charge particle flow)

10.

470.9

 

11.

690

Meinel band—marker of high latitude and high energy of electrons involved into the process

12.

388.3

Cyanogen (CN) emission, a spectral signature of lightning flashes with continuing current (monitoring of lightning that can cause forest fires ((Christian et al. 1983; Fuquay et al. 1967)).

13.

294

Signature of extremely high altitude event (lines of N2(VK) system)

14.

313

 

15.

399.8

N22P(1,4) analyzed by (Armstrong et al. 2000), in comparison to 427.8 nm and 470.9 nm lines

16.

Without filter

Total emission of lightning or TLE measurements