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Octahedral reduced Gaussian (O grids)1O1280O1024O640O512O400O320O256O200O160O128O96O80O64O48O32
Original reduced Gaussian  (N grids)-N1280N1024N640N512N400N320N256N200N160N128N96N80N64N48N32
Regular (Full) Gaussian (F grids)F1280F1024F640F512F400F320F256F200F160F128F96F80F64F48F32

1 Additional grids include O192, O800, O912, O2000, O8000.


MARS requests specifying an unsupported grid will fail. For example, a retrieval request with grid=O123 will return an error.  If the letter denoting the type of Gaussian grid is omitted, e.g. grid=320, a full (or regular) Gaussian grid with 320 grid lines is returned.

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grid = av,           # will return the archived model grid
grid = 0.1251/0.125,    1,            # will return an 0.125 1 x 0.125 1 deg longitude/latitude grid
grid = F320,                 # will return a full Gaussian grid with 320 latitude lines between the pole and equator

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