CPTv10+ files for root mean sq anom [ NOAA NCDC ERSST version3b err ]

NOAA NCDC ERSST version3b[err anom sst ]
grid: /X (degree_east) periodic (0) to (2W) by 2.0 N= 180 pts :grid
grid: /Y (degree_north) ordered (88S) to (88N) by 2.0 N= 89 pts :grid
grid: /T (months since 1960-01-01) ordered (Jan 1854) to (May 2015) by 1.0 N= 1937 pts :grid
root mean sq anom [ NOAA NCDC ERSST version3b err ] 0.0 meters[ X zlev | T]