The NOAA MgII Core-to-Wing Ratio

Lawrence Puga [lawrence.puga@noaa.gov] and Rodney Viereck, NOAA-Space Environment Center, Boulder, Colorado.

            The NOAA MgII Core-to-Wing Ratio (MgII C/W) is updated, using SBUV/2 observations from both the NOAA-17 and NOAA-16 satellites. The revised data includes a new algorithm for calculating the ratio, and taking advantage of the approximately 12-hour difference in satellite observations to create two values each day.