Next: Using SPC Up: SPC (formerly S) A Previous: Contents Contents . SPC was originally written to process data written by SPECTRA , the spectral-line observing program of the Parkes radiotelescope. While SPC 's data structure and many of its commands are Parkes-specific it has been adapted for use by a variety of other telescopes (e.g. the AT, Nobeyama). ... The basic idea in using SPC is to load in a sequence of up to 110 spectra and then use various commands to operate on these spectra. ...