GAMMA Questions

Hello,

I am trying to conduct an own IPTA process, based on your IPTA demo for Athen. After the initial steps I'm on the way to determine the height corrections and athmospheric phases with multi_def_pt command.
Which is the best option to determine the initial thresholds, because with the default values the generated result there is no solution.
The inputs are joined and he command is like:
multi_def_pt pt - pSLC_par - itab pbase 0 pdiffa 1 4243 pres1 pdh1 - punw1 psigma1 pmask1 90. -0.01 0.01 100 1.2 1.1 1 0 1

Thanks!