DSET ^olr_month.dat
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UNDEF -9999.0
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TITLE Monthly mean OLR data (Jan 1983  ~ Dec 2016 )        
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XDEF 144 linear   0.0 2.5 
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YDEF  73 linear -90.0 2.5    
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ZDEF 1 LEVELS 1 
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TDEF 408 LINEAR 01Jan1983  1mo
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VARS 1          
olr 1 99  monthly mean OLR (W/m*m)
ENDVARS