It may occur that you get in a terrible mess; the calibration is in chaos and you have no idea what table has what in it. It is time to start over again at this point. This requires that you simply delete the appropriate tables. The AIPS procedure CLSNZAP deletes all SN tables and all CL tables except the first. Similarly, SNZAP deletes all SN tables, and CLZAP deletes all but the first CL tables. If you want to remove the flagging tables too, use EXTZAP (delete all tables of specified type) or EXTDEST (delete the specified table). To avoid confusion, it's probably a good idea to reset the SU table too. Use SETJY to do this with sources set to your secondaries, and optype='rese'. You don't want to reset the primary flux density to zero as well, just the boot-strapped secondaries. Don't delete the SU table, as there is no way to make a new one without reloading the data. Just do this resetting on the channel 0 data base.
Last update : 27/11/93
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