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The VAPOR Prepare Editor
Vapor Input Mode
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Specifies the list of 2D parameters from the input data to be converted into VAPOR format. The parameters are identified by their short names or parameter ids. The default value is an empty string.
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Specifies the list of 3D parameters from the input data to be converted into VAPOR format. The parameters are identified by their short names or parameter ids. The default value is an empty string.
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For the Regular type the vertical grid is supposed to be equidistant (in the user coordinate space). This type can be used when we have data on equidistant hight height levels.
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The Regular type can also be used for pressure or model level data when no height information is available. In this case the 3D scene is rendered in a pressure or model level "space". Besides, because VAPOR requires vertical coordinate values increasing along the z axis the vertical coordinate values (pressure or model level number) are multiplied by -1 for VAPOR. |
Vapor Elevation Param
Specifies the short name or parameter id of of the 3D parameter interpreted as the elevation of the 3D levels. Available when Vapor Vertical Grid Type is Layered.
This parameter has to be either the height or the geopotential (z) of the levels. If geopotential is specified it is converted into metres by Metview for Vapor. The default value is z.
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Please note that neither the height nor the geopotential of model levels are archived in MARS. It means that for model level data either of these fields has to be computed for Layered mode. These computations can be done with VAPOR Prepare by simply specifying z for Vapor Elevation Param. The computations can only be carried out if the input data contains temperature (t) and specific humidity (q) on model levels and geopotential (z) and logarithm of surface pressure (lnsp) on the bottommost model level. |
Vapor Bottom Coordinate
The name of the upper level GRIB parameter interpreted as the elevation of the upper levelsbottom elevation level. Available when Vapor Vertical Grid Type is Layered. The default value is 0.
Vapor Top Coordinate
The name of the upper level GRIB parameter interpreted as the elevation of the upper levelstop elevation level. Available when Vapor Vertical Grid Type is Layered. The default value is 16000.
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If it is set to Native the whole area of the input data is converted into VAPOR format. While if it is set to Interpolate the input data is interpolated to a specific (lat-lon) grid and area.
Vapor Area
Specifies the area of the output grid in south/west/north/east format. The default value is -90/-180/90/180. Available when Vapor Area Selection is Interpolate.
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This option specifies the number of refinement levels in a VAPOR data approximation hierarchy . Starting with where the native grid resolution , of each successive level in the hierarchy is a factor of two smaller finer along each dimension. If level is 0 no hiearchy hierarchy will be created (all data will be stored at their native resolution). If level is 1 a single approximation will be created, thus the hierarchy will have two levels: the first approximation (indexed as 0 in VAPOR) and the native grid resolution , and the first approximation(indexed as 1 in VAPOR). And so on.
The default value is: 2.
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Specifies the output directory (it has to be an absolute can be a relative path) where the VDF file and VDC directory hierarchy will be generated. If this directory does not exist Metview will create it. The default value is an empty string /tmp.
Vapor Reuse Input
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VAPOR data files can be huge (gigabytes) so the output path to store the results of the GRIB to VAPOR conversion should always be carefully selected. |