Masaki:
Andi was in NYC the day the Dish man came... and a good thing, too!
I had very clear instructions about where was acceptable and not for dish placement.
She would have freaked when he pulled out the tripod to raise the dish up even higher on our roof!(but that didn't work)
Can you even think about what she would have said to me had he installed the dish on the pole you suggested or a tree (with the various wires running to the house)!
'tis a pity
Doug