to export the maximum elevation you know how to generate elevation plots. Then right click on the El area and select Export to Excel.
The plot will export the elevation values with an automatic time step, typ. 30 second for a oe day simulation. You can select a different time step in “Edit / Properties / Gantt / Plots time step”. Set it to CUSTOM and select a plot of 1sec time step. This will give you the max elevation of each pass at 1 sec resolution.
