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The Pulsar Astronomy Network

!sc_td

sc_td is a piece of software developed for reading [[SCAMP]] data.
It has been frequently updated since it's initial creation in 1991.

sc_td performs the following functions:

* Split multi-beam data into seperate files.
* Kill flagged frequency channels.
* Extract header information for each beam.

sc_td produces a set of output files for each beam in the file:

* *.dat contains the raw data for that beam, in the [[datfile]] format.
* *.hdr contains the coresponding header information for the beam.
* *.ascu contains the 'bookkeeping' information.



!!Killing channels
Different versions of sc_td have been known to do the channel killing differently.
Early versions read the given name of the file and used this to look up in a kill.chans file.
Later versions used a -K switch to specify the channels to kill (and in fact may fail if the -K switch is not provided).
The Parkes/Epping version of the software uses a global kill.chans file, whereas the version at JBO searches the current working directory for the kill.chans file.


The kill.chans file is a list of the Tape name followed by the centre frequency, and the channel offset.
Then there is a list of channels to kill, with each line terminated by the value -1.

For example
PM0001 1515 -3.0 5 6 7 8 25 27 94 -1