itx

plot the calculated travel time-distance values as lines (1), symbols of height symht (2), symbols of height symht interpolated at the observed receiver locations contained in the file tx.in (invr=1 must be used, if not, itx=2 is used) (3); or as residuals measured from the oberved data in tx.in (invr=1 must be used) (4); no calculated travel times are plotted if itx=0 (default: 1)