Interpolating SN1 into CL2

Once a satisfactory solution table (SN1) has been created, it needs to be interpolated into a new CL table using CLCAL. Check the results with SNPLT. The INTERPOL parameter is best set to SELF if the density of $T_{\mathrm{sys}}$ points is high. Otherwise it may be necessary to use INTERPOL='2PT' to interpolate between sources, e.g. if some sources have no $T_{\mathrm{sys}}$ data. An additional complication arises if $T_{\mathrm{sys}}$ meaurements are blanked in the SN table (this will occur when negative $T_{\mathrm{sys}}$ values appear in the antab file). In this situation it is important to interpolate over the blanked values to avoid having data automatically flagged by AIPS. This is done by setting SAMPTYP, BPARM (choose a very small number to avoid smoothing) and DOBLANK to the following values:

>TASK 'CLCAL
>ANTENNAS 0
>SOURCES ''
>TIMERANG 0
>INTERPOL ''
>SAMPTYP 'BOX'
>BPARM 0.00001
>DOBLANK 1
>SNVER 1
>GAINVER 1
>GAINUSE 2
>GO

Do not run ACCOR!

The task ACCOR should only be run on data that were produced at the VLBA correlator in Socorro.