SSC all-sky maps used in Nakahira et al. 2020 PASJ 72 17N (https://doi.org/10.1093/pasj/psz139).

These files are identical to those released from HEASARC at https://heasarc.gsfc.nasa.gov/FTP/maxi/data/allskymaps/ssc2years/,
besides difference of the filenames and minor fixes of the keywords.

notes:
2022.03.23 fixed units from " counts/deg**2/cm**2" to "counts/deg**2/cm**2/sec"