Authors: Gabriela Gonzalez (CU/LASP), Phillip Chamberlin (LASP)

Using the “A” channel from the Multiple EUV Grating Spectrographs (MEGS-A) on EVE, which measures wavelengths of 5-37 nm, we improve the wavelength scale accuracy and spectral resolution during solar flares. EVE’s least processed data product, Level 0B, is used to create updated wavelength scales that are shown to make more precise spectral measurements (Gonzalez et al. 2024). An improvement range of 5.21% to 11.35% was found in the emission line widths using an X2.2 class flare that occurred on 15 February 2011, SOL2011-02-15T0156. Before Doppler calculations can be made, additional corrections must be made to account for the detector degradation.