comment : @nkpoint l
rta w/o the mask keyword
Array 1: set pointing 8.1 -22.3
Array 2: set pointing 11.3 -22.3
Array 3: set pointing 7.0 -21.0
rta with the mask keyword
Array 1: set pointing 8.1 -20.6
Array 2: set pointing 11.8 -20.6
Array 3: set pointing 7.6 -19.4
set pointing 12 -21