This data set contains mean normalized backscatter coefficient (sigma-naught); backscatter variance; and other associated data files from Seasat SASS carrying a Ku-band scatterometer (1978), European Space Agency (ESA) Earth Remote Sensing (ERS) -1 and -2 missions carrying a C-band scatterometer (1992-2001), the NASA Scatterometer (NSCAT) mission (1996-1997), SeaWinds on QuikSCAT (1999-2009), SeaWinds on ADEOS-II/Midori2 (2003), and the ESA Advanced scatterometer (ASCAT) (2009+). Global, overlapping swath data were accumulated over a fixed interval of time. The data were then gridded, binned, and averaged, before it was processed using the Scatterometer Image Reconstruction (SIR) and SIR w/filtering algorithms developed at Brigham Young University.