Comparison of Version 1 and Version 2 SNOE databases In the preparation of the Version 1 nitric oxide database, we used a value for the g-factor of the (0,1) nitric oxide gamma band of 2.25 x 10-6 photons/sec-molecule [Barth et al., 2003]. We took into account the varying heliocentric distance of the Earth. The solar flux at 226 nm was taken from measurements by the Spacelab 2 SUSIM instrument. In the preparation of the Version 2 nitric oxide database, we used a value for the g-factor of 2.62 x 10-6 photons/sec-molecule [Barth et al., 2004]. We took into account the varying heliocentric distance of the Earth and we used daily values of the solar flux at 226 nm measured by the SOLSTICE instrument on UARS. We have adopted the Stevens [1995] g-factors as normalized to SOLSTICE on February 25, 1992. The ratio between the Version 1 g-factor and the Version 2 database is 0.856. References Barth, C. A., K. D. Mankoff, S. M. Bailey, and S. C. Solomon, Global observations of nitric oxide in the thermosphere, J. Geophys. Res., 108(A1), 1027, doi:10.1029/2002JA009458, 2003. Barth, C. A. and S. M. Bailey, Comparison of a thermospheric photochemical model with SNOE observations of nitric oxide, J. Geophys. Res., doi:10.1029/2003JA010227, 2004. Available on the lasp website: lasp.colorado.edu/snoedata. Stevens, M. H., Nitric oxide gamma band fluorescnt scattering and self-absorption I the mesosphere and lower thermosphere, J. Geophys. Res., 100, 14,735-14,742, 1995.