A new GMF is being developed for C-band scatterometers. CMOD6 is used for ERS and ASCAT and is valid for their combined incidence angle range. For low winds there is a clear mismatch between CMOD6 and the measurements. C2013 is valid for ASCAT only and performs especially well for low winds. The new GMF (CMOD7) uses both CMOD6 and C2013 and shows improvements in the retrieved wind distribution compared to CMOD6 and C2013, while retaining its validity for both ERS and ASCAT.
JA Verspeek, A Stoffelen. CMOD7