Template grads

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Graduation invitations. Dark graduation photo album. Graduation party printables. Explore premium templates. Graduation party invitation Graduation Party design, half-fold. Middle school graduation flyer. Hats off graduation card. Bright future graduation card. Emoji graduation card. Elementary school graduation flyer. Modern gown graduation card. Graduation announcement Graduation Party design, quarter-fold. For individual ensemble forecasts PDT 1 and 11 , two comma-delimited grib2 codes are required: the ensemble type and perturbation number.

For derived forecasts based on all ensemble members PDT 2 and 12 , only one grib2 code is required: the derived forecast. Two examples are given below. GrADS has to retrieve both the u and v component in order to do the rotation calculation. Using this entry replaces the old technique of putting 33 for U or 34 for V in the first element of the units field in the variable declaration.

They are separated by a comma, with no spaces. More than one pair of components may be listed; in this case, the pairs should be separated by a space. This ensemble of entries describes all the variables contained in the data set. The format of the variable records is as follows: varname levs units description Version 2. The syntax of varname and units is different depending on what kind of data format DTYPE you are describing.

Details provided below:. For NetCDF files, this name appears in the output from ncdump. The classic varname syntax i. This is an integer that specifies the number of vertical levels the variable contains. If levs is 0, the variable does not correspond to any vertical level. Surface variables e. For DTYPE station or bufr, surface variables have a levs value of 0 and upper air variables have a levs value of 1.

Exception to this rule for bufr data: replicated surface variables are given a levs value of 2. The first number in the list is the number of vertical levels the variable contains or zero if the variable doesn't vary in Z. The remaining numbers are the GRIB2 parameters that specify the veritcal level or layer. The levs field may contain up to five comma-delimited numbers:. Some level types such as "mean sea level" or "tropopause" do not require an LVAL. In this case, LVAL may be omitted see the "slp" example below.

The external utilities grib2scan and wgrib2 are quite useful in determining what the values for the levs field should be for a GRIB2 data file. Version 2. This information is used by the gribmap utility for mapping the variables listed in the descriptor file to the data records in the GRIB files.

The order of the dimensions listed in the units field does matter. They must describe the shape of the variable as it was written to the SDF data file.

For NetCDf files, this information appears in the output from ncdump next to the variable name. If your data file contains a variable that also varies in a non-world-coordinate dimension e. Another option in this example would be to fill the unused Z axis with the histogram intervals:. In this case, it would appear to GrADS that variable 'hist' varies in Z, but the user would have to remember that the Z levels correspond to histogram intervals.

The latter technique makes it easier to slice through the data, but is not the most accurate representation. And if you don't have an unsued world-coordinate axis available, then you still have a way to access your data. For non-standard binary files, the units field is used to instruct GrADS how to read binary files that do not conform to the default structure or do not contain 4-byte float data. GrADS assumes the data were written in the following order starting from the fastest varying dimension to the slowest : longitude X , latitude Y , vertical level Z , variable VAR , time T.

If your binary data set was created or "packed" according to a different dimension sequence, then you can use the units field to tell GrADS exactly how to unpack the data. For these non-standard binary files, the units field is a series of one or more comma-delimited numbers, the first of which is always Some of these options have additional attributes which are specified with arg. GrADS 1. Thus, all variables are written out one level at a time. The upper air prognostic variables were transposed, but the diagnostic variables were not.

Thus an arg of 1 means the variable has been var-z transposed, and an arg of 2 means the variable has not. Thus, all times for one variable are written out in order followed by all times for the next variable, etc. Data files for which "VAR" and "T" have been transposed may not be templated together.

This option causes GrADS to work very inefficiently. However, it is useful for initial inspection and debugging. If there are multiple variables in the same file, they must all be the same type. The dimension sequence is assumed to be the default. The old technique for versions older than 1. The u-component variable must have a units value of 33, and the v-component variable must have a units value of This is the GRIB convention.

Max characters. The first two characters of the attribute comment must be " " followed by a space -- this distinguishes it from an ordinary comment see below. Attribute comments may appear anywhere in the descriptor file, and they will be ignored if used with older versions of GrADS. All file attributes may be retrieved with the 'query attr' command.

Set varname to "lon", "lat", "lev", or "time" to describe attributes of the four coordinate axes; otherwise, use one of the variable names listed in the variable declarations.

Attribute names are case sensitive, and it is assumed that the names are identical for all variables in the netcdf or hdfsds data file. If the names given do not match any attributes, the scale factor will be assigned a value of 1.

The transformation of packed data is done after the undef test has been applied. This entry specifies the filename of the data file being described.

There are four options: grib, hdfsds, netcdf, or station. Data file is an indexed GRIB version 1 file. The index file is created by the gribmap utility. This data type requires a special entry in the units field of the variable declaration.