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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 internally in VAPOR Prepare by simply specifying z for Vapor Elevation Param. The computations can only be done if the input data contains temperature (t) and specific humidity (q) on model levels and geopotential (z) and logarithmic logarithm of surface pressure (lnsp) on the bottommost model level. |
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Vapor Area Selection
Specifies the data input area selection mode. The possible values are: Native and Interpolate. The default value is Native.
If it is set to Native
The name of the upper level GRIB parameter interpreted as the elevation of the upper levels. Available when Vapor Vertical Grid Type is Layered 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 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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Specifies the resolution of the output grid in dx/dy format, where dx is the grid increment in east-west direction, while dy is the grid increment in north-south direction (both in degrees units). The default value is: 1/1. Available when Vapor Area Selection is Interpolate.
Vapor Refinement Level
Specifies This option specifies the number of refinement levels in a VAPOR data approximation hierarchy. Starting with the native grid resolution, each successive level in the hierarchy is a factor of two smaller along each dimension. If level is 0 no hiearchy 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 native grid resolution, and the first approximation. And so on.
The default value is: 2 resolution of the output grid in dx/dy format, where dx is the grid increment in east-west direction, while dy is the grid increment in north-south direction (both in degrees units). The default value is: 1/1.
Vapor Vdf Name
Specifies the resolution name of the output grid in dx/dy format, where dx is the grid increment in east-west direction, while dy is the grid increment in north-south direction (both in degrees unitsresulting VDF file (the .vdf suffix is automatically appended to the filename). The default value is : 1/1 an empty string.
Vapor Output Path
Specifies the output directory (it has to be an absolute path) where the GRIB files and the AVAILABLE file VDF file and VDC directory hierarchy will be generated. If this directory does not exist Metview will create it. The output GRIB files have the following naming convention: ENyymmddhh.
Vapor Reuse Input
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it
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Flextra An Mars Expver
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. The default value is
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an empty string.
Vapor
Flextra Date
Specifies the run date of the forecast. Available when Flextra Prepare Mode is Forecast.
Flextra Time
Specifies the run time of the forecast . Available when Flextra Prepare Mode is Forecast.
Flextra Steps
Specifies the forecast steps in hours. Here a list of values is given. Available when Flextra Prepare Mode is Forecast.
Flextra Period Start Date
Specifies the start date of the period. Available when Flextra Prepare Mode is Period.
Flextra Period Start Time
Specifies the start time of the period. Available when Flextra Prepare Mode is Period.
Flextra Period End Date
Specifies the end date of the period. Available when Flextra Prepare Mode is Period.
Flextra Period End Time
Specifies the end time of the period. Available when Flextra Prepare Mode is Period.
Flextra Period Step
Specifies the time step of the period in hours. The allowed values are as follows: 3 or 6. Available when Flextra Prepare Mode is Period.
Flextra Area
Specifies the area of the output grid in south/west/north/east format. The default value is -90/-180/90/180.
Flextra Grid
Specifies the resolution of the output grid in dx/dy format, where dx is the grid increment in east-west direction, while dy is the grid increment in north-south direction (both in degrees units). The default value is: 1/1.
Flextra Top Level
Only data on and below this model level will be used to generate the FLEXTRA input fields. This level can be specified either as a model level or as a pressure value. In the latter case FLEXTRA Prepare will use the data retrieved for the first date to determine the topmost model level. The default value of this parameter is 1, which mens that all the model levels will be used if Flextra Top Level Units is set to Model Levels.
Flextra Top Level Units
Specifies the units of the value of Flextra Top Level. The allowed values are Model Levels or hPa. The default value is Model Levels.
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Reuse Input
If this parameter is set On FLEXTRA Prepare checks the existence of the data files to be generated and if they are already in place no new data is retrieved and processed. If it is Off all the fields are always retrieved and processed and the existing data files are overwritten. The same happens to the AVAILABLE file. The existence of a FLEXTRA input GRIB file is checked by using the file name and a set of GRIB API keys from the first message in the file. These keys are as follows: date, time, stepRange, gridType, iDirectionIncrement, jDirectionIncrement, latitudeOfFirstGridPoint, latitudeOfLastGridPoint, longitudeOfFirstGridPoint, longitudeOfLastGridPoint.
Flextra Output Path
Specifies the output directory (it has to be an absolute path) where the GRIB files and the AVAILABLE file will be generated. If this directory does not exist Metview will create it. The output GRIB files have the following naming convention: ENyymmddhh.
Vapor Bottom Coordinate
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