grid_filter

Syntax

grid_filter --help
grid_filter [gridname]
grid_filter -old [gridname]

Synopsis

Removes grid vectors from a grdmap file using range and/or CPID criteria.

Options

`--help`	print the help message and exit.
`--version`	print the RST version number and exit.
`-cpid`	exclude data according to control program ID (CPID).
`-minrng minrange`	exclude data from slant ranges nearer than minrange km (default is 0 km).
`-maxrng maxrange`	exclude data from slant ranges greater than maxrange km (default is 10,000 km).
`gridname`	filename of the `grdmap` format file. If this is omitted, the file will be read from standard input.
`-old`	the input file is a `grd` format file.

Description

Removes grid vectors from a grid file.

The task searches for and removes grid vectors that do not meet user-defined slant range or control program ID (CPID) criteria. By default the task will not exclude any data.

Examples

grid_filter -old 20040830.grd > 20040830.grd.s

Filter the grd format file "20040830.grd" to produce the file "20040830.grd.f".