There are two versions of software to match to two version of the data archive.
Noaa-14 and earlier satellites had their SEM data archived in the original format.\

Documentaion for these data are available here in file SEM1v1.0.pdf

With the launch of NOAA-15 a new archive format was developed to match the
upgraded SEM instrument referred to as SEM2. 

Documentaion for these data are available here in file SEM2vn.n.pdf