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     Ingrid:
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     HTMLwords
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    WORLDBATH[bath
]
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    grid: /X  (degree_east) periodic (0.04166667W) to (0.125W) by 0.08333333 N= 4320 pts :grid
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    grid: /Y  (degree_north) ordered (90.04166S) to (90.04166N) by 0.08333333 N= 2162 pts :grid
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    detrended-bfl   $partialdiff sub X$   $integral dY$ [ WORLDBATH bath ]    [ X | Y]
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