$partialdiff sub Y$ detrended-bfl $partialdiff sub X$ [ WORLDBATH432 bath ]
Longitude | grid: /X (degree_east) periodic [ (0.4166667E) (0.4166667E) (1.25E) ... (1.25W)] N= 432 pts :grid |
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Latitude | grid: /Y (degree_north) ordered (89.58334N) to (89.58334S) by 0.8333334 N= 216 pts :grid |