Satellites also get side-views, not just top-down. If you wanted to communicate more quickly, you would hang your clothes on a clothesline. Picture black and

Satellites also get side-views, not just top-down. If you wanted to communicate more quickly, you would hang your clothes on a clothesline. Picture black and white sheets. Day one: 01010011 Day two: 01001111 Day three: 01010011 So, that's 8 times faster. Or you lay out a bunch of tiles... Tiles are tricky, because if someone asks, "Why are you changing what's on your roof?!" it's hard to answer. Sheets on a clothesline are plausible, though. "I'm doing my laundry!"