DSET ^gpi_mth_2.5_mmday_198601-yyyymm          
UNDEF  -9999.0                                                                  
TITLE Monthly GPI   (2.5 x 2.5 deg lat/lon)                             
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format yrev big_endian                                                          
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XDEF 144 LINEAR   1.25  2.5                                                         
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YDEF  32 LINEAR -38.75  2.5                                                        
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ZDEF 01 LEVELS 1                                                                
TDEF 900 LINEAR Jan1986 1mo                                                     
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VARS 1                                                                          
gpi    1 0     mm/day                                                   
ENDVARS