trim_grid

Syntax

trim_grid --help
trim_grid [-vb] [-sd yyyymmdd] [-st hr:mn] [-ed yyyymmdd] [-et hr:mn] [-ex hr:mn] [-cn channel] [-exc stid...] [-i intt] name
trim_grid -old [-vb] [-sd yyyymmdd] [-st hr:mn] [-ed yyyymmdd] [-et hr:mn] [-ex hr:mn] [-cn channel] [-exc stid...] [-i intt] name

Synopsis

Extracts a section from a grd or grdmap format file.

Options

`--help`	print the help message and exit.
`--version`	print the RST version number and exit.
`-vb`	verbose. Log information to the console.
`-sd yyyymmdd`	extract starting from the date yyyymmdd.
`-st hr:mn`	extract starting from the time hr:mn.
`-ed yyyymmdd`	stop extracting at the date yyyymmdd.
`-et hr:mn`	stop extracting at the time hr:mn.
`-ex hr:mn`	extract an interval whose extent is hr:mn.
`-cn channel`	extract only those records from channel channel.
`-exc stid...`	exclude data from the stations listed in stid which is a comma separated list of station identifier codes or numbers.
`-i intt`	re-integrate the data so that each record is intt seconds in length.
`name`	filename of the `grdmap` format file to trim. If this is omitted, the file is read from standard input.
`-old`	the input file is a `grd` format file.

Description

Extracts a section from a grd or grdmap format file.

The extracted section is written to standard output.

Examples

trim_grid -old -vb -st 11:00 -et 14:00 19981020.grd > 19981020.1100.grd

Extracts a 3 hour period starting at 11:00UT from the file called "19981020.grd" to produce a file called "19981020.1100.grd". The status is logged to standard error.

trim_grid -sd 19991121 -st 22:00 -ex 4:00 -i 240 199911.grdmap > 199911.2100.grdmap

Extracts a 4 hour period starting at 22:00UT on November 21, 1999 from the file "199911.grdmap" to produce the output file "199911.2100.grdmap". The records are re-integrated to produce records at 4-minute intervals.

trim_grid -old -exc gbr,kap 20001120.grd > 20001120.2.grd

Removes vectors from the Goose Bay and Kapuskasing Radars from the file "20001120.grd" to produce the file "20001120.2.grd"