## SLA_NNG ##

Normalised and seasonally adjusted monthly averages of the mean GSLA
in the region bounded by lats: 0 - 10N and lons: 125-145E

Seasonal adjustment: O(+/-0.03m)
Normalization: (H - mean)/standard_deviation

Nov 22 2017: SLA_NNG is now detrended as well as normalised and seasonally adjusted

File format is
Year January February ... December