Azimuthal frame change

Q&A
1

I try
pscoast -JE0/90/16c -R-90/90/-89/90 -Bg0/g90 - Di -S109/202/220 -N1 >map.ps
to get half an azimuthal projection including a semi-circular frame at the SP along with a line through -90/90 long. How do I remove the line but keep the semi-circle ?

2

Seems a weird use of the projection but this plots only the South border

pscoast -JE0/90/16c -R-90/90/-89/90 -Bg0/g90S -Di -S109/202/220 -N1 >map.ps
3

I agree that it’s weird. Many many thanks.