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The input data must be defined on a 3D grid, which has to be regular horizontally. Vertically the grid The vertical grids are described here.
VAPOR uses a right-handed coordinate system which means that :
- the horizontal grid has to start at the SW corner
- the vertical coordinates have to increase along the z axis (upwards).
VAPOR vertical grids
Vertically the 3D data to be visualised can be:
- regular: equidistant
- layered: the height along a layer can change from point-to-point. The elevation above sea level of each layer has to be available as a variable called ELEVATION. VAPOR internally interpolate all the data to height levels.
- spherical: it is used for solar physics
VAPOR uses a right-handed coordinate system which means that :
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| Level type | Elevation present or can be derived (as z or h) | Vertical grid type | Surface data can be used |
|---|---|---|---|
| pressure | yes | layered | yes |
| pressure | no | regular | no |
| model | yes | layered | yes |
| model | no | regular | no |
| height | yes | regular | yes |