DSET ^cmorph.spei.12.mo.bin
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UNDEF  -999.
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TITLE  SPI at 12-mo time scale 
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XDEF 720 LINEAR  0.25  0.5
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YDEF 240 LINEAR -59.75  0.5
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ZDEF   1 LINEAR  1 1 
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TDEF 1 LINEAR Apr2024 1mo
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VARS 1
p 1 00 spei
ENDVARS