fftplot
This program produces a quicklook on standard output from
Chilbolton FFT data. The data are stored as little-endian floats and
currently will only be read in correctly on little-endian hardware
(i.e. Intel-based PCs).
fftplot [options] profiles.fft > image.[png|eps]
Options
- -profile n
- Plot profile n in the file; 0 is the
first profile in the file and -1 is the last. By default the
first is plotted.
- -png
- Produce PNG images. This is the default.
- -eps, -ps
- Produce encapsulated postscript images. These files can be
incorporated into documents or sent directly to a postscript printer.
- -xfs s
- Contact the X font server s. By default the
program tries to contact unix/:-1, but this is not always the
appropriate port to use; on some systems you should use `-xfs
unix/:7100'. If X is running then you can find the address of the
font server by running `xset -q'. In XFree86 version 4.0 the
font server has been incorporated with the X server, so an X font
server may need to be run independently: as root run `xfs -port
7100'. Note that you can decide the default font server to
contact at compile time - just edit the top level
Makefile. Unfortunately at present there are no fall-back fonts built
into the program.
- -SNRrange f1 f2
- Set the colour scale range for the signal-to-noise ratio in dB.
- -heightrange f1 f2
- Set the height range to be from f1 km to
f2 km.
- -size {width}x{height}
- Set the size of the axes in pixels.
- -barsize {width}x{height}
- Set the size of the colourbar in pixels.
- -fontsize n
- Set the size of the font (default 12).
- -reversev
- Reverse the velocities.
- -system s
- Override the default name of the instrument; this string is
written on the plot. Note that the string can contain certain HTML
tags such as I, B, SUB, SUP, and also SYM for greek letters.