PSRCHIVE user documentation: psrsh examples

Shell script

The following script reduces the number of phase bins in each profile to 512, performs scattered power correction, and weights each profile by its signal-to-noise ratio: 
#!/usr/bin/env psrsh

# reduce the number of phase bins to 512
bscrunch 512

# perform scattered power correction
spc

# weight each profile by its S/N
weight snr
If the above example were saved with the filename spc.psh, and made executable (chmod a+x spc.psh), it could be used to reduce a list of archives by running a command like the following: 
spc.psh -m archive1 [archive2 ...]
Here, the -m command line option is used to overwrite the original data files.