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MARS
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Describes the intermediate grid to which the transform is performed.
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It may be coincident with the target grid, in which case there isn't a second interpolation and the transform to the target grid is direct. For other keywords controlling the interpolation see the diagram below.
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Possible intgrid values are
| Value | Description | ||
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| NONE | Disables any intermediate grid before interpolation, i.e. the transform will go directly to what has been specified with keyword GRID. Disables any truncation before the transformation
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| AUTO | An intermediate FULL Gaussian grid is used, derived from the output target GRID, by looking at the equivalent resolution. This is the default behaviour. | ||
grid_name | Specifies a Gaussian grid name like F80, O80, N80, N640 etc. (like [FNO][1-9][0-9]*), supported by the MARS client. Specifies | number | Specifies the intermediate grid, e.g. O96 for an Octahedral Gaussian with 96 lines between Pole and Equator. |
| SOURCE | Sets the intermediate grid to Octahedral Gaussian with N=(cubic relation from input truncation)=T+1, e.g. from input T1279 INTGRID=SOURCE(=O1280) | ||
| OFF | Reserved MARS value that resets the value inherited, effectively removing the keyword from the request which then results in intgrid being set to AUTO. |
Examples:
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Dissemination
This keyword cannot be specified. Behaviour is the same as the default for MARS, i.e. AUTO.
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