Plotting data for yourself

These instructions are designed for use by JCMT staff with access to the relevant data and programs.

TPOINT is a powerful plotting and analysis package which is used at JCMT to generate and update the pointing model.

Pointing data files are held at the summit in directories/filenames like
/jac_logs/20050106/20050105-173329.pnt
Copy the relevant file into your working space. The command sequence below will provide collimations (IE & CA) and a plot of the residuals:

• tpoint
• indat yyyymmdd-hhmmss.pnt
• inmod /home/imc/pointing/models/jcmt.mod_070412
• plton xw
• fix
• use ie ca
• fit
• call a9 - - or 'g s a' or 'g a a' or 'g z z' or gdist, gscat, ghyst, gsmap, gdist, gam etc
• gc P to produce tpoint.ps of last plot
• slist - to tabulate results/residuals
• mask n - to remove the nth datum, after which you could repeat the fitting . . .
• end