operator_help.h

/* Automatically created with makedoc, don't edit! */

static const char *InfoHelp[] = {
    "NAME",
    "    info, infon, map - Information and simple statistics",
    "",
    "SYNOPSIS",
    "    <operator>  infiles",
    "",
    "DESCRIPTION",
    "    This module writes information about the structure and contents ",
    "    of all input files to standard output.  All input files need to have ",
    "    the same structure with the same variables on different timesteps.",
    "    The information displayed depends on the chosen operator.",
    "",
    "OPERATORS",
    "    info   Dataset information listed by parameter identifier",
    "           Prints information and simple statistics for each field of all",
    "           input datasets. For each field the operator prints one line with ",
    "           the following elements:",
    "           - Date and Time",
    "           - Level, Gridsize and number of Missing values",
    "           - Minimum, Mean and Maximum \\",
    "           The mean value is computed without the use of area weights!",
    "           - Parameter identifier",
    "    infon  Dataset information listed by parameter name",
    "           The same as operator info but using the name instead of the",
    "           identifier to label the parameter.",
    "    map    Dataset information and simple map",
    "           Prints information, simple statistics and a map for each field of all input",
    "           datasets. The map will be printed only for fields on a regular lon/lat grid.",
    NULL
};

static const char *SinfoHelp[] = {
    "NAME",
    "    sinfo, sinfon - Short information",
    "",
    "SYNOPSIS",
    "    <operator>  infiles",
    "",
    "DESCRIPTION",
    "    This module writes information about the structure of infiles to standard output.",
    "    infiles is an arbitrary number of input files. All input files need to have ",
    "    the same structure with the same variables on different timesteps.",
    "    The information displayed depends on the chosen operator.",
    "",
    "OPERATORS",
    "    sinfo   Short information listed by parameter identifier",
    "            Prints short information of a dataset. The information is divided into",
    "            4 sections. Section 1 prints one line per parameter with the following ",
    "            information:",
    "            - institute and source",
    "            - timestep type",
    "            - number of levels and z-axis number",
    "            - horizontal grid size and number",
    "            - data type",
    "            - parameter identifier",
    "            Section 2 and 3 gives a short overview of all grid and vertical coordinates.",
    "            And the last section contains short information of the time coordinate.",
    "    sinfon  Short information listed by parameter name",
    "            The same as operator sinfo but using the name instead of the ",
    "            identifier to label the parameter.",
    NULL
};

static const char *DiffHelp[] = {
    "NAME",
    "    diff, diffn - Compare two datasets field by field",
    "",
    "SYNOPSIS",
    "    <operator>  infile1 infile2",
    "",
    "DESCRIPTION",
    "    Compares the contents of two datasets field by field. The input datasets need to have the",
    "    same structure and its fields need to have the same header information and dimensions.",
    "",
    "OPERATORS",
    "    diff   Compare two datasets listed by parameter id",
    "           Provides statistics on differences between two datasets.",
    "           For each pair of fields the operator prints one line with the following information:",
    "           - Date and Time",
    "           - Level, Gridsize and number of Missing values",
    "           - Number of different values",
    "           - Occurrence of coefficient pairs with different signs (S)",
    "           - Occurrence of zero values (Z)",
    "           - Maxima of absolute difference of coefficient pairs",
    "           - Maxima of relative difference of non-zero coefficient pairs with equal signs",
    "           - Parameter identifier",
    "    diffn  Compare two datasets listed by parameter name",
    "           The same as operator diff. Using the name instead of the",
    "           identifier to label the parameter.",
    NULL
};

static const char *NinfoHelp[] = {
    "NAME",
    "    npar, nlevel, nyear, nmon, ndate, ntime, ngridpoints, ngrids - ",
    "    Print the number of parameters, levels or times",
    "",
    "SYNOPSIS",
    "    <operator>  infile",
    "",
    "DESCRIPTION",
    "    This module prints the number of variables, levels or times of the ",
    "    input dataset.",
    "",
    "OPERATORS",
    "    npar         Number of parameters",
    "                 Prints the number of parameters (variables).",
    "    nlevel       Number of levels",
    "                 Prints the number of levels for each variable.",
    "    nyear        Number of years",
    "                 Prints the number of different years.",
    "    nmon         Number of months",
    "                 Prints the number of different combinations of years and months.",
    "    ndate        Number of dates",
    "                 Prints the number of different dates.",
    "    ntime        Number of timesteps",
    "                 Prints the number of timesteps.",
    "    ngridpoints  Number of gridpoints",
    "                 Prints the number of gridpoints for each variable.",
    "    ngrids       Number of horizontal grids",
    "                 Prints the number of horizontal grids.",
    NULL
};

static const char *ShowinfoHelp[] = {
    "NAME",
    "    showformat, showcode, showname, showstdname, showlevel, showltype, showyear, ",
    "    showmon, showdate, showtime, showtimestamp - Show variables, levels or times",
    "",
    "SYNOPSIS",
    "    <operator>  infile",
    "",
    "DESCRIPTION",
    "    This module prints the format, variables, levels or times of the input dataset.",
    "",
    "OPERATORS",
    "    showformat     Show file format",
    "                   Prints the file format of the input dataset.",
    "    showcode       Show code numbers",
    "                   Prints the code number of all variables.",
    "    showname       Show variable names",
    "                   Prints the name of all variables.",
    "    showstdname    Show standard names",
    "                   Prints the standard name of all variables.",
    "    showlevel      Show levels",
    "                   Prints all levels for each variable.",
    "    showltype      Show GRIB level types",
    "                   Prints the GRIB level type for all z-axes.",
    "    showyear       Show years",
    "                   Prints all years.",
    "    showmon        Show months",
    "                   Prints all months.",
    "    showdate       Show date information",
    "                   Prints date information of all timesteps (format YYYY-MM-DD).",
    "    showtime       Show time information",
    "                   Prints time information of all timesteps (format hh:mm:ss).",
    "    showtimestamp  Show timestamp",
    "                   Prints timestamp of all timesteps (format YYYY-MM-DDThh:mm:ss).",
    NULL
};

static const char *FiledesHelp[] = {
    "NAME",
    "    partab, codetab, griddes, zaxisdes, vct - Dataset description",
    "",
    "SYNOPSIS",
    "    <operator>  infile",
    "",
    "DESCRIPTION",
    "    This module provides operators to print meta information about a dataset.",
    "    The printed meta-data depends on the chosen operator.",
    "",
    "OPERATORS",
    "    partab    Parameter table",
    "              Prints all available meta information of the variables.",
    "    codetab   Parameter code table",
    "              Prints a code table with a description of all variables.",
    "              For each variable the operator prints one line listing the",
    "              code, name, description and units.",
    "    griddes   Grid description",
    "              Prints the description of all grids.",
    "    zaxisdes  Z-axis description",
    "              Prints the description of all z-axes.",
    "    vct       Vertical coordinate table",
    "              Prints the vertical coordinate table.",
    NULL
};

static const char *CopyHelp[] = {
    "NAME",
    "    copy, cat - Copy datasets",
    "",
    "SYNOPSIS",
    "    <operator>  infiles outfile",
    "",
    "DESCRIPTION",
    "    This module contains operators to copy or concatenate datasets.",
    "    infiles is an arbitrary number of input files. All input files need to have ",
    "    the same structure with the same variables on different timesteps.",
    "",
    "OPERATORS",
    "    copy  Copy datasets",
    "          Copies all input datasets to outfile. ",
    "    cat   Concatenate datasets",
    "          Concatenates all input datasets and appends the result to the end ",
    "          of outfile. If outfile does not exist it will be created.",
    NULL
};

static const char *ReplaceHelp[] = {
    "NAME",
    "    replace - Replace variables",
    "",
    "SYNOPSIS",
    "    replace  infile1 infile2 outfile",
    "",
    "DESCRIPTION",
    "    The replace operator replaces variables in infile1 by variables from infile2 and write",
    "    the result to outfile. Both input datasets need to have the same number of timesteps.",
    NULL
};

static const char *DuplicateHelp[] = {
    "NAME",
    "    duplicate - Duplicates a dataset",
    "",
    "SYNOPSIS",
    "    duplicate[,ndup]  infile outfile",
    "",
    "DESCRIPTION",
    "    This operator duplicates the contents of infile and writes the result to outfile.",
    "    The optional parameter sets the number of duplicates, the default is 2.",
    "",
    "PARAMETER",
    "    ndup  INTEGER  Number of duplicates, default is 2.",
    NULL
};

static const char *MergegridHelp[] = {
    "NAME",
    "    mergegrid - Merge grid",
    "",
    "SYNOPSIS",
    "    mergegrid  infile1 infile2 outfile",
    "",
    "DESCRIPTION",
    "    Merges grid points of all variables from infile2 to infile1 and write the result to outfile.",
    "    Only the non missing values of infile2 will be used. The horizontal grid of infile2 should ",
    "    be smaller or equal to the grid of infile1 and the resolution must be the same.",
    "    Only rectilinear grids are supported. Both input files need to have the same variables ",
    "    and the same number of timesteps.",
    NULL
};

static const char *MergeHelp[] = {
    "NAME",
    "    merge, mergetime - Merge datasets",
    "",
    "SYNOPSIS",
    "    <operator>  infiles outfile",
    "",
    "DESCRIPTION",
    "    This module reads datasets from several input files, merges them and writes the resulting dataset to outfile.",
    "",
    "OPERATORS",
    "    merge      Merge datasets with different fields",
    "               Merges time series of different fields from several input datasets. The number ",
    "               of fields per timestep written to outfile is the sum of the field numbers ",
    "               per timestep in all input datasets. The time series on all input datasets are ",
    "               required to have different fields and the same number of timesteps.",
    "               The fields in each different input file either have to be different variables",
    "               or different levels of the same variable. A mixture of different variables on",
    "               different levels in different input files is not allowed.",
    "    mergetime  Merge datasets sorted by date and time",
    "               Merges all timesteps of all input files sorted by date and time.",
    "               All input files need to have the same structure with the same variables on ",
    "               different timesteps. After this operation every input timestep is in outfile ",
    "               and all timesteps are sorted by date and time.",
    "",
    "ENVIRONMENT",
    "    SKIP_SAME_TIME",
    "        If set to 1, skips all consecutive timesteps with a double entry of the same timestamp.",
    "",
    "NOTE",
    "    The operators in this module need to open all input files simultaneously.",
    "    The maximum number of open files depends on the operating system!",
    NULL
};

static const char *SplitHelp[] = {
    "NAME",
    "    splitcode, splitparam, splitname, splitlevel, splitgrid, splitzaxis, ",
    "    splittabnum - Split a dataset",
    "",
    "SYNOPSIS",
    "    <operator>[,params]  infile obase",
    "",
    "DESCRIPTION",
    "    This module splits infile into pieces. The output files will be named <obase><xxx><suffix>",
    "    where suffix is the filename extension derived from the file format. xxx and the contents ",
    "    of the output files depends on the chosen operator. ",
    "    params is a comma separated list of processing parameters.",
    "",
    "OPERATORS",
    "    splitcode    Split code numbers",
    "                 Splits a dataset into pieces, one for each different code number.",
    "                 xxx will have three digits with the code number.",
    "    splitparam   Split parameter identifiers",
    "                 Splits a dataset into pieces, one for each different parameter identifier.",
    "                 xxx will be a string with the parameter identifier.",
    "    splitname    Split variable names",
    "                 Splits a dataset into pieces, one for each variable name.",
    "                 xxx will be a string with the variable name.",
    "    splitlevel   Split levels",
    "                 Splits a dataset into pieces, one for each different level.",
    "                 xxx will have six digits with the level.",
    "    splitgrid    Split grids",
    "                 Splits a dataset into pieces, one for each different grid.",
    "                 xxx will have two digits with the grid number.",
    "    splitzaxis   Split z-axes",
    "                 Splits a dataset into pieces, one for each different z-axis.",
    "                 xxx will have two digits with the z-axis number.",
    "    splittabnum  Split parameter table numbers",
    "                 Splits a dataset into pieces, one for each GRIB1 parameter table number.",
    "                 xxx will have three digits with the GRIB1 parameter table number.",
    "",
    "PARAMETER",
    "    swap            STRING  Swap the position of obase and xxx in the output filename",
    "    uuid=<attname>  STRING  Add a UUID as global attribute <attname> to each output file",
    "",
    "ENVIRONMENT",
    "    CDO_FILE_SUFFIX",
    "        Set the default file suffix. This suffix will be added to the output file ",
    "        names instead of the filename extension derived from the file format. ",
    "        Set this variable to NULL to disable the adding of a file suffix.",
    "",
    "NOTE",
    "    The operators in this module need to open all output files simultaneously.",
    "    The maximum number of open files depends on the operating system!",
    NULL
};

static const char *SplittimeHelp[] = {
    "NAME",
    "    splithour, splitday, splitseas, splityear, splityearmon, splitmon - ",
    "    Split timesteps of a dataset",
    "",
    "SYNOPSIS",
    "    <operator>  infile obase",
    "    splitmon[,format]  infile obase",
    "",
    "DESCRIPTION",
    "    This module splits infile into  timesteps pieces. The output files will be named",
    "    <obase><xxx><suffix> where suffix is the filename extension derived from the file format. ",
    "    xxx and the contents of the output files depends on the chosen operator. ",
    "",
    "OPERATORS",
    "    splithour     Split hours",
    "                  Splits a file into pieces, one for each different hour.",
    "                  xxx will have two digits with the hour.",
    "    splitday      Split days",
    "                  Splits a file into pieces, one for each different day.",
    "                  xxx will have two digits with the day.",
    "    splitseas     Split seasons",
    "                  Splits a file into pieces, one for each different season.",
    "                  xxx will have three characters with the season.",
    "    splityear     Split years",
    "                  Splits a file into pieces, one for each different year.",
    "                  xxx will have four digits with the year (YYYY).",
    "    splityearmon  Split in years and months",
    "                  Splits a file into pieces, one for each different year and month.",
    "                  xxx will have six digits with the year and month (YYYYMM).",
    "    splitmon      Split months",
    "                  Splits a file into pieces, one for each different month.",
    "                  xxx will have two digits with the month.",
    "",
    "PARAMETER",
    "    format  STRING  C-style format for strftime() (e.g. %B for the full month name)",
    "",
    "ENVIRONMENT",
    "    CDO_FILE_SUFFIX",
    "        Set the default file suffix. This suffix will be added to the output file ",
    "        names instead of the filename extension derived from the file format. ",
    "        Set this variable to NULL to disable the adding of a file suffix.",
    "",
    "NOTE",
    "    The operators in this module need to open all output files simultaneously.",
    "    The maximum number of open files depends on the operating system!",
    NULL
};

static const char *SplitselHelp[] = {
    "NAME",
    "    splitsel - Split selected timesteps",
    "",
    "SYNOPSIS",
    "    splitsel,nsets[,noffset[,nskip]]  infile obase",
    "",
    "DESCRIPTION",
    "    This operator splits infile into pieces, one for each adjacent",
    "    sequence t_1, ...., t_n of timesteps of the same selected time range.",
    "    The output files will be named <obase><nnnnnn><suffix> where nnnnnn is the ",
    "    sequence number and suffix is the filename extension derived from the file format.",
    "",
    "PARAMETER",
    "    nsets    INTEGER  Number of input timesteps for each output file",
    "    noffset  INTEGER  Number of input timesteps skipped before the first timestep range (optional)",
    "    nskip    INTEGER  Number of input timesteps skipped between timestep ranges (optional)",
    "",
    "ENVIRONMENT",
    "    CDO_FILE_SUFFIX",
    "        Set the default file suffix. This suffix will be added to the output file ",
    "        names instead of the filename extension derived from the file format. ",
    "        Set this variable to NULL to disable the adding of a file suffix.",
    NULL
};

static const char *DistgridHelp[] = {
    "NAME",
    "    distgrid - Distribute horizontal grid",
    "",
    "SYNOPSIS",
    "    distgrid,nx[,ny]  infile obase",
    "",
    "DESCRIPTION",
    "    This operator distributes a dataset into smaller pieces. Each output file contains a different region of the",
    "    horizontal source grid. A target grid region contains a structured longitude/latitude box of the source grid.",
    "    Only rectilinear and curvilinear source grids are supported by this operator.",
    "    The number of different regions can be specified with the parameter nx and ny. The output files will be named ",
    "    <obase><xxx><suffix> where suffix is the filename extension derived from the file format. xxx will have five digits with ",
    "    the number of the target region.",
    "",
    "PARAMETER",
    "    nx  INTEGER  Number of regions in x direction",
    "    ny  INTEGER  Number of regions in y direction [default: 1]",
    "",
    "NOTE",
    "    This operator needs to open all output files simultaneously.",
    "    The maximum number of open files depends on the operating system!",
    NULL
};

static const char *CollgridHelp[] = {
    "NAME",
    "    collgrid - Collect horizontal grid",
    "",
    "SYNOPSIS",
    "    collgrid[,nx[,names]]  infiles outfile",
    "",
    "DESCRIPTION",
    "    This operator collects the data of the input files to one output file. ",
    "    All input files need to have the same variables and the same number of timesteps on a different",
    "    horizonal grid region. A source region must be a structured longitude/latitude grid box.",
    "    The parameter nx needs to be specified only for non regular lon/lat grids.",
    "",
    "PARAMETER",
    "    nx     INTEGER  Number of regions in x direction [default: number of input files]",
    "    names  STRING   Comma separated list of variable names [default: all variables]",
    "",
    "NOTE",
    "    This operator needs to open all input files simultaneously.",
    "    The maximum number of open files depends on the operating system!",
    NULL
};

static const char *SelectHelp[] = {
    "NAME",
    "    select, delete - Select fields",
    "",
    "SYNOPSIS",
    "    <operator>,params  infiles outfile",
    "",
    "DESCRIPTION",
    "    This module selects some fields from infiles and writes them to outfile.",
    "    infiles is an arbitrary number of input files. All input files need to have ",
    "    the same structure with the same variables on different timesteps.",
    "    The fields selected depends on the chosen parameters. Parameter is a comma",
    "    separated list of \"key=value\" pairs. Wildcards can be used for string parameter.",
    "",
    "OPERATORS",
    "    select  Select fields",
    "            Selects all fields with parameters in a user given list.",
    "    delete  Delete fields",
    "            Deletes all fields with parameters in a user given list.",
    "",
    "PARAMETER",
    "    name              STRING  Comma separated list of variable names.",
    "    param             STRING  Comma separated list of parameter identifiers.",
    "    code              INTEGER Comma separated list of code numbers.",
    "    level             FLOAT   Comma separated list of vertical levels.",
    "    levidx            INTEGER Comma separated list of index of levels.",
    "    zaxisname         STRING  Comma separated list of zaxis names.",
    "    zaxisnum          INTEGER Comma separated list of zaxis numbers.",
    "    ltype             INTEGER Comma separated list of GRIB level types.",
    "    gridname          STRING  Comma separated list of grid names.",
    "    gridnum           INTEGER Comma separated list of grid numbers.",
    "    steptype          STRING  Comma separated list of timestep types.",
    "    date              STRING  Comma separated list of dates (format YYYY-MM-DDThh:mm:ss).",
    "    startdate         STRING  Start date (format YYYY-MM-DDThh:mm:ss).",
    "    enddate           STRING  End date (format YYYY-MM-DDThh:mm:ss).",
    "    minute            INTEGER Comma separated list of minutes.",
    "    hour              INTEGER Comma separated list of hours.",
    "    day               INTEGER Comma separated list of days.",
    "    month             INTEGER Comma separated list of months.",
    "    season            STRING  Comma separated list of seasons (substring of DJFMAMJJASOND or ANN).",
    "    year              INTEGER Comma separated list of years.",
    "    timestep          INTEGER Comma separated list of timesteps. Negative values selects timesteps from the end (NetCDF only).",
    "    timestep_of_year  INTEGER Comma separated list of timesteps of year.",
    "    timestepmask      STRING  Read timesteps from a mask file.",
    NULL
};

static const char *SelmultiHelp[] = {
    "NAME",
    "    selmulti, delmulti, changemulti - Select multiple fields via GRIB1 parameters",
    "",
    "SYNOPSIS",
    "    <operator>,selection-specification  infile outfile",
    "",
    "DESCRIPTION",
    "    This module selects multiple fields from infile and writes them to outfile.",
    "    selection-specification is a filename or in-place string with the selection specification.",
    "    Each selection-specification has the following compact notation format: ",
    "    ",
    "       <type>(parameters; leveltype(s); levels)",
    "    ",
    "    type      "    "    sel for select or del for delete (optional)",
    "    parameters"    "    GRIB1 parameter code number",
    "    leveltype "    "    GRIB1 level type",
    "    levels    "    "    value of each level",
    "    ",
    "    Examples:",
    "    ",
    "       (1; 103; 0) ",
    "       (33,34; 105; 10) ",
    "       (11,17; 105; 2) ",
    "       (71,73,74,75,61,62,65,117,67,122,121,11,131,66,84,111,112; 105; 0) ",
    "    ",
    "    The following descriptive notation can also be used for selection specification from a file:",
    "    ",
    "       SELECT/DELETE, PARAMETER=parameters, LEVTYPE=leveltye(s), LEVEL=levels",
    "    ",
    "    Examples:",
    "    ",
    "       SELECT, PARAMETER=1, LEVTYPE=103, LEVEL=0 ",
    "       SELECT, PARAMETER=33/34, LEVTYPE=105, LEVEL=10 ",
    "       SELECT, PARAMETER=11/17, LEVTYPE=105, LEVEL=2 ",
    "       SELECT, PARAMETER=71/73/74/75/61/62/65/117/67/122, LEVTYPE=105, LEVEL=0 ",
    "       DELETE, PARAMETER=128, LEVTYPE=109, LEVEL=* ",
    "    ",
    "    The following will convert Pressure from Pa into hPa; Temp from Kelvin to Celsius: ",
    "       SELECT, PARAMETER=1, LEVTYPE= 103, LEVEL=0, SCALE=0.01 ",
    "       SELECT, PARAMETER=11, LEVTYPE=105, LEVEL=2, OFFSET=273.15 ",
    "    If SCALE and/or OFFSET are defined, then the data values are scaled as SCALE*(VALUE-OFFSET).",
    "",
    "OPERATORS",
    "    selmulti     Select multiple fields",
    "    delmulti     Delete multiple fields",
    "    changemulti  Change identication of multiple fields",
    NULL
};

static const char *SelvarHelp[] = {
    "NAME",
    "    selparam, delparam, selcode, delcode, selname, delname, selstdname, sellevel, ",
    "    sellevidx, selgrid, selzaxis, selzaxisname, selltype, seltabnum - Select fields",
    "",
    "SYNOPSIS",
    "    <operator>,params  infile outfile",
    "    selcode,codes  infile outfile",
    "    delcode,codes  infile outfile",
    "    selname,names  infile outfile",
    "    delname,names  infile outfile",
    "    selstdname,stdnames  infile outfile",
    "    sellevel,levels  infile outfile",
    "    sellevidx,levidx  infile outfile",
    "    selgrid,grids  infile outfile",
    "    selzaxis,zaxes  infile outfile",
    "    selzaxisname,zaxisnames  infile outfile",
    "    selltype,ltypes  infile outfile",
    "    seltabnum,tabnums  infile outfile",
    "",
    "DESCRIPTION",
    "    This module selects some fields from infile and writes them to outfile.",
    "    The fields selected depends on the chosen operator and the parameters.",
    "",
    "OPERATORS",
    "    selparam      Select parameters by identifier",
    "                  Selects all fields with parameter identifiers in a user given list.",
    "    delparam      Delete parameters by identifier",
    "                  Deletes all fields with parameter identifiers in a user given list.",
    "    selcode       Select parameters by code number",
    "                  Selects all fields with code numbers in a user given list.",
    "    delcode       Delete parameters by code number",
    "                  Deletes all fields with code numbers in a user given list.",
    "    selname       Select parameters by name",
    "                  Selects all fields with parameter names in a user given list.",
    "    delname       Delete parameters by name",
    "                  Deletes all fields with parameter names in a user given list.",
    "    selstdname    Select parameters by standard name",
    "                  Selects all fields with standard names in a user given list.",
    "    sellevel      Select levels",
    "                  Selects all fields with levels in a user given list.",
    "    sellevidx     Select levels by index",
    "                  Selects all fields with index of levels in a user given list.",
    "    selgrid       Select grids",
    "                  Selects all fields with grids in a user given list.",
    "    selzaxis      Select z-axes",
    "                  Selects all fields with z-axes in a user given list.",
    "    selzaxisname  Select z-axes by name",
    "                  Selects all fields with z-axis names in a user given list.",
    "    selltype      Select GRIB level types",
    "                  Selects all fields with GRIB level type in a user given list.",
    "    seltabnum     Select parameter table numbers",
    "                  Selects all fields with parameter table numbers in a user given list.",
    "",
    "PARAMETER",
    "    params      INTEGER  Comma separated list of parameter identifiers",
    "    codes       INTEGER  Comma separated list of code numbers",
    "    names       STRING   Comma separated list of variable names",
    "    stdnames    STRING   Comma separated list of standard names",
    "    levels      FLOAT    Comma separated list of vertical levels",
    "    levidx      INTEGER  Comma separated list of index of levels",
    "    ltypes      INTEGER  Comma separated list of GRIB level types",
    "    grids       STRING   Comma separated list of grid names or numbers",
    "    zaxes       STRING   Comma separated list of z-axis types or numbers",
    "    zaxisnames  STRING   Comma separated list of z-axis names",
    "    tabnums     INTEGER  Comma separated list of parameter table numbers",
    NULL
};

static const char *SeltimeHelp[] = {
    "NAME",
    "    seltimestep, seltime, selhour, selday, selmonth, selyear, selseason, seldate, ",
    "    selsmon - Select timesteps",
    "",
    "SYNOPSIS",
    "    seltimestep,timesteps  infile outfile",
    "    seltime,times  infile outfile",
    "    selhour,hours  infile outfile",
    "    selday,days  infile outfile",
    "    selmonth,months  infile outfile",
    "    selyear,years  infile outfile",
    "    selseason,seasons  infile outfile",
    "    seldate,date1[,date2]  infile outfile",
    "    selsmon,month[,nts1[,nts2]]  infile outfile",
    "",
    "DESCRIPTION",
    "    This module selects user specified timesteps from infile and writes them to outfile.",
    "    The timesteps selected depends on the chosen operator and the parameters.",
    "",
    "OPERATORS",
    "    seltimestep  Select timesteps",
    "                 Selects all timesteps with a timestep in a user given list.",
    "    seltime      Select times",
    "                 Selects all timesteps with a time in a user given list.",
    "    selhour      Select hours",
    "                 Selects all timesteps with a hour in a user given list.",
    "    selday       Select days",
    "                 Selects all timesteps with a day in a user given list.",
    "    selmonth     Select months",
    "                 Selects all timesteps with a month in a user given list.",
    "    selyear      Select years",
    "                 Selects all timesteps with a year in a user given list.",
    "    selseason    Select seasons",
    "                 Selects all timesteps with a month of a season in a user given list.",
    "    seldate      Select dates",
    "                 Selects all timesteps with a date in a user given range.",
    "    selsmon      Select single month",
    "                 Selects a month and optional an arbitrary number of timesteps before and after this month.",
    "",
    "PARAMETER",
    "    timesteps  INTEGER  Comma separated list of timesteps. Negative values selects timesteps from the end (NetCDF only).",
    "    times      STRING   Comma separated list of times (format hh:mm:ss).",
    "    hours      INTEGER  Comma separated list of hours.",
    "    days       INTEGER  Comma separated list of days.",
    "    months     INTEGER  Comma separated list of months.",
    "    years      INTEGER  Comma separated list of years.",
    "    seasons    STRING   Comma separated list of seasons (substring of DJFMAMJJASOND or ANN).",
    "    date1      STRING   Start date (format YYYY-MM-DDThh:mm:ss).",
    "    date2      STRING   End date (format YYYY-MM-DDThh:mm:ss) [default: date1].",
    "    nts1       INTEGER  Number of timesteps before the selected month [default: 0].",
    "    nts2       INTEGER  Number of timesteps after the selected month [default: nts1].",
    NULL
};

static const char *SelboxHelp[] = {
    "NAME",
    "    sellonlatbox, selindexbox - Select a box of a field",
    "",
    "SYNOPSIS",
    "    sellonlatbox,lon1,lon2,lat1,lat2  infile outfile",
    "    selindexbox,idx1,idx2,idy1,idy2  infile outfile",
    "",
    "DESCRIPTION",
    "    Selects a box of the rectangularly understood field.",
    "",
    "OPERATORS",
    "    sellonlatbox  Select a longitude/latitude box",
    "                  Selects a regular longitude/latitude box. The user has to give the longitudes and latitudes of the ",
    "                  edges of the box. Considered are only those grid cells with the grid center inside the lon/lat box.",
    "                  For rotated lon/lat grids the parameter needs to be rotated coordinates.",
    "    selindexbox   Select an index box",
    "                  Selects an index box. The user has to give the indexes of the edges of the box. The index of the ",
    "                  left edge may be greater then that of the right edge.",
    "",
    "PARAMETER",
    "    lon1  FLOAT    Western longitude",
    "    lon2  FLOAT    Eastern longitude",
    "    lat1  FLOAT    Southern or northern latitude",
    "    lat2  FLOAT    Northern or southern latitude",
    "    idx1  INTEGER  Index of first longitude (1 - nlon)",
    "    idx2  INTEGER  Index of last longitude (1 - nlon)",
    "    idy1  INTEGER  Index of first latitude (1 - nlat)",
    "    idy2  INTEGER  Index of last latitude (1 - nlat)",
    NULL
};

static const char *SelgridcellHelp[] = {
    "NAME",
    "    selgridcell, delgridcell - Select grid cells",
    "",
    "SYNOPSIS",
    "    <operator>,indexes  infile outfile",
    "",
    "DESCRIPTION",
    "    Selects grid cells of all fields from infile. The user has to give the indexes of each",
    "    grid cell. The resulting grid in outfile is unstructured.",
    "",
    "OPERATORS",
    "    selgridcell  Select grid cells",
    "    delgridcell  Delete grid cells",
    "",
    "PARAMETER",
    "    indexes  INTEGER  Comma separated list of indexes",
    NULL
};

static const char *SamplegridHelp[] = {
    "NAME",
    "    samplegrid - Resample grid",
    "",
    "SYNOPSIS",
    "    samplegrid,factor  infile outfile",
    "",
    "DESCRIPTION",
    "    This is a special operator for resampling the horizontal grid.",
    "    No interpolation takes place. Resample factor=2 means every second grid point is removed.",
    "    Only rectilinear and curvilinear source grids are supported by this operator.",
    "",
    "PARAMETER",
    "    factor  INTEGER  Resample factor, typically 2, which will half the resolution",
    NULL
};

static const char *CondHelp[] = {
    "NAME",
    "    ifthen, ifnotthen - Conditional select one field",
    "",
    "SYNOPSIS",
    "    <operator>  infile1 infile2 outfile",
    "",
    "DESCRIPTION",
    "    This module selects field elements from infile2 with respect to infile1 and writes them ",
    "    to outfile. The fields in infile1 are handled as a mask. A value ",
    "    not equal to zero is treated as \"true\", zero is treated as \"false\".",
    "    The number of fields in infile1 has either to be the same as in infile2 or the",
    "    same as in one timestep of infile2 or only one.",
    "    The fields in outfile inherit the meta data from infile2.",
    "",
    "OPERATORS",
    "    ifthen     If then",
    "                        / i_2(t,x) if i_1([t,]x) NE 0  AND  i_1([t,]x) NE miss",
    "               o(t,x) =",
    "                        \\ miss     if i_1([t,]x) EQ 0  OR   i_1([t,]x) EQ miss",
    "    ifnotthen  If not then",
    "                        / i_2(t,x) if i_1([t,]x) EQ 0  AND  i_1([t,]x) NE miss",
    "               o(t,x) = ",
    "                        \\ miss     if i_1([t,]x) NE 0  OR   i_1([t,]x) EQ miss",
    NULL
};

static const char *Cond2Help[] = {
    "NAME",
    "    ifthenelse - Conditional select  two fields",
    "",
    "SYNOPSIS",
    "    ifthenelse  infile1 infile2 infile3 outfile",
    "",
    "DESCRIPTION",
    "    This operator selects field elements from infile2 or infile3 with respect to",
    "    infile1 and writes them to outfile. The fields in infile1 are handled as a mask.",
    "    A value not equal to zero is treated as \"true\", zero is treated as \"false\".",
    "    The number of fields in infile1 has either to be the same as in infile2 or the ",
    "    same as in one timestep of infile2 or only one.",
    "    infile2 and infile3 need to have the same number of fields.",
    "    The fields in outfile inherit the meta data from infile2.",
    "    ",
    "              / i_2(t,x) if i_1([t,]x) NE 0  AND  i_1([t,]x) NE miss",
    "    o(t,x) = <  i_3(t,x) if i_1([t,]x) EQ 0  AND  i_1([t,]x) NE miss",
    "              \\ miss     if i_1([t,]x) EQ miss",
    NULL
};

static const char *CondcHelp[] = {
    "NAME",
    "    ifthenc, ifnotthenc - Conditional select a constant",
    "",
    "SYNOPSIS",
    "    <operator>,c  infile outfile",
    "",
    "DESCRIPTION",
    "    This module creates fields with a constant value or missing value.",
    "    The fields in infile are handled as a mask. A value not equal ",
    "    to zero is treated as \"true\", zero is treated as \"false\".",
    "",
    "OPERATORS",
    "    ifthenc     If then constant",
    "                         / c      if i(t,x) NE 0  AND  i(t,x) NE miss",
    "                o(t,x) =",
    "                         \\ miss   if i(t,x) EQ 0  OR   i(t,x) EQ miss",
    "    ifnotthenc  If not then constant",
    "                         / c      if i(t,x) EQ 0  AND  i(t,x) NE miss",
    "                o(t,x) =",
    "                         \\ miss   if i(t,x) NE 0  OR   i(t,x) EQ miss",
    "",
    "PARAMETER",
    "    c  FLOAT  Constant",
    NULL
};

static const char *MapReduceHelp[] = {
    "NAME",
    "    reducegrid - Reduce fields to user-defined mask",
    "",
    "SYNOPSIS",
    "    reducegrid,mask[,limitCoordsOutput]  infile outfile",
    "",
    "DESCRIPTION",
    "    This module holds an operator for data reduction based on a user defined mask.",
    "    The output grid is unstructured and includes coordinate bounds. Bounds can be",
    "    avoided by using the additional 'nobounds' keyword. With 'nocoords' given,",
    "    coordinates a completely suppressed.",
    "",
    "PARAMETER",
    "    mask               STRING file which holds the mask field",
    "    limitCoordsOutput  STRING optional parameter to limit coordinates output: 'nobounds' disables coordinate bounds, 'nocoords' avoids all coordinate information",
    NULL
};

static const char *CompHelp[] = {
    "NAME",
    "    eq, ne, le, lt, ge, gt - Comparison of two fields",
    "",
    "SYNOPSIS",
    "    <operator>  infile1 infile2 outfile",
    "",
    "DESCRIPTION",
    "    This module compares two datasets field by field. The resulting",
    "    field is a mask containing 1 if the comparison is true and 0 if not. ",
    "    The number of fields in infile1 should be the same as in infile2.",
    "    One of the input files can contain only one timestep or one field.",
    "    The fields in outfile inherit the meta data from infile1 or infile2.",
    "    The type of comparison depends on the chosen operator.",
    "",
    "OPERATORS",
    "    eq  Equal",
    "                  /   1   if i_1(t,x) EQ i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) NE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    "    ne  Not equal",
    "                  /   1   if i_1(t,x) NE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) EQ i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    "    le  Less equal",
    "                  /   1   if i_1(t,x) LE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) GT i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    "    lt  Less than",
    "                  /   1   if i_1(t,x) LT i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) GE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    "    ge  Greater equal",
    "                  /   1   if i_1(t,x) GE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) LT i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    "    gt  Greater than",
    "                  /   1   if i_1(t,x) GT i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "        o(t,x) = <    0   if i_1(t,x) LE i_2(t,x)  AND  i_1(t,x),i_2(t,x) NE miss",
    "                  \\  miss if i_1(t,x) EQ miss      OR   i_2(t,x) EQ miss",
    NULL
};

static const char *CompcHelp[] = {
    "NAME",
    "    eqc, nec, lec, ltc, gec, gtc - Comparison of a field with a constant",
    "",
    "SYNOPSIS",
    "    <operator>,c  infile outfile",
    "",
    "DESCRIPTION",
    "    This module compares all fields of a dataset with a constant. The resulting",
    "    field is a mask containing 1 if the comparison is true and 0 if not.",
    "    The type of comparison depends on the chosen operator.",
    "",
    "OPERATORS",
    "    eqc  Equal constant",
    "                   /   1   if i(t,x) EQ c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) NE c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "    nec  Not equal constant",
    "                   /   1   if i(t,x) NE c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) EQ c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "    lec  Less equal constant",
    "                   /   1   if i(t,x) LE c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) GT c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "    ltc  Less than constant",
    "                   /   1   if i(t,x) LT c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) GE c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "    gec  Greater equal constant",
    "                   /   1   if i(t,x) GE c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) LT c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "    gtc  Greater than constant",
    "                   /   1   if i(t,x) GT c     AND  i(t,x),c NE miss",
    "         o(t,x) = <    0   if i(t,x) LE c     AND  i(t,x),c NE miss",
    "                   \\  miss if i(t,x) EQ miss  OR   c EQ miss",
    "",
    "PARAMETER",
    "    c  FLOAT  Constant",
    NULL
};

static const char *SetattributeHelp[] = {
    "NAME",
    "    setattribute - Set attributes",
    "",
    "SYNOPSIS",
    "    setattribute,attributes  infile outfile",
    "",
    "DESCRIPTION",
    "    This operator sets attributes of a dataset. Each attribute has the following structure:",
    "    ",
    "      [var_nm@]att_nm=att_val",
    "    ",
    "       var_nm  Variable name (optional). Example: pressure",
    "       att_nm  Attribute name. Example: units",
    "       att_val Comma separated list of attribute values. Example: pascal",
    "    ",
    "    The value of var_nm is the name of the variable containing the attribute (named att_nm) that",
    "    you want to set. Use wildcards to set the attribute att_nm to more than one variable.",
    "    A value of var_nm of '*' will set the attribute att_nm to all data variables.",
    "    If var_nm is missing then att_nm refers to a global attribute.",
    "    ",
    "    The value of att_nm is the name of the attribute you want to set.",
    "    ",
    "    The value of att_val is the contents of the attribute att_nm. att_val may be a single value",
    "    or one-dimensional array of elements. The type of the attribute value will be detected",
    "    automaticly from the contents of the value.",
    "    ",
    "    A special meaning has the attribute name FILE. If this is the 1st attribute then all attributes",
    "    are read from a file specified in the value of att_val.",
    "",
    "PARAMETER",
    "    attributes  STRING  Comma separated list of attributes. ",
    NULL
};

static const char *SetpartabHelp[] = {
    "NAME",
    "    setpartabp, setpartabn - Set parameter table",
    "",
    "SYNOPSIS",
    "    <operator>,table[,convert]  infile outfile",
    "",
    "DESCRIPTION",
    "    This module transforms data and metadata of infile via a parameter table and writes the result to outfile.",
    "    A parameter table is an ASCII formatted file with a set of parameter entries for each variable. Each new set have to",
    "    start with \"\\&parameter\" and to end with \"/\".",
    "    ",
    "    The following parameter table entries are supported:",
    "    ",
    "     Entry           & Type        & Description      ",
    "     name            & WORD        & Name of the variable",
    "     out_name        & WORD        & New name of the variable",
    "     param           & WORD        & Parameter identifier (GRIB1: code[.tabnum];  GRIB2: num[.cat[.dis]])",
    "     out_param       & WORD        & New parameter identifier",
    "     type            & WORD        & Data type (real or double)",
    "     standard_name   & WORD        & As defined in the CF standard name table",
    "     long_name       & STRING      & Describing the variable",
    "     units           & STRING      & Specifying the units for the variable",
    "     comment         & STRING      & Information concerning the variable",
    "     cell_methods    & STRING      & Information concerning calculation of means or climatologies",
    "     cell_measures   & STRING      & Indicates the names of the variables containing cell areas and volumes",
    "     missing_value   & FLOAT       & Specifying how missing data will be identified",
    "     valid_min       & FLOAT       & Minimum valid value",
    "     valid_max       & FLOAT       & Maximum valid value",
    "     ok_min_mean_abs & FLOAT       & Minimum absolute mean",
    "     ok_max_mean_abs & FLOAT       & Maximum absolute mean",
    "     factor          & FLOAT       & Scale factor",
    "     delete          & INTEGER     & Set to 1 to delete variable",
    "     convert         & INTEGER     & Set to 1 to convert the unit if necessary",
    "    ",
    "    Unsupported parameter table entries are stored as variable attributes.",
    "    The search key for the variable depends on the operator. Use setpartabn to search variables by the name.",
    "    This is typically used for NetCDF datasets. The operator setpartabp searches variables by the parameter ID.",
    "",
    "OPERATORS",
    "    setpartabp  Set parameter table",
    "                Search variables by the parameter identifier.",
    "    setpartabn  Set parameter table",
    "                Search variables by name.",
    "",
    "PARAMETER",
    "    table    STRING   Parameter table file or name",
    "    convert  STRING   Converts the units if necessary",
    NULL
};

static const char *SetHelp[] = {
    "NAME",
    "    setcodetab, setcode, setparam, setname, setunit, setlevel, setltype - ",
    "    Set field info",
    "",
    "SYNOPSIS",
    "    setcodetab,table  infile outfile",
    "    setcode,code  infile outfile",
    "    setparam,param  infile outfile",
    "    setname,name  infile outfile",
    "    setunit,unit  infile outfile",
    "    setlevel,level  infile outfile",
    "    setltype,ltype  infile outfile",
    "",
    "DESCRIPTION",
    "    This module sets some field information. Depending on the chosen operator the ",
    "    parameter table, code number, parameter identifier, variable name or level is set.",
    "",
    "OPERATORS",
    "    setcodetab  Set parameter code table",
    "                Sets the parameter code table for all variables.",
    "    setcode     Set code number",
    "                Sets the code number for all variables to the same given value.",
    "    setparam    Set parameter identifier",
    "                Sets the parameter identifier of the first variable.",
    "    setname     Set variable name",
    "                Sets the name of the first variable.",
    "    setunit     Set variable unit",
    "                Sets the unit of the first variable.",
    "    setlevel    Set level",
    "                Sets the first level of all variables.",
    "    setltype    Set GRIB level type",
    "                Sets the GRIB level type of all variables.",
    "",
    "PARAMETER",
    "    table  STRING   Parameter table file or name",
    "    code   INTEGER  Code number",
    "    param  STRING   Parameter identifier (GRIB1: code[.tabnum]; GRIB2: num[.cat[.dis]])",
    "    name   STRING   Variable name",
    "    level  FLOAT    New level",