Take a Walk with GPS
I have precious little GPS experience. I guess I've never gone far enough off the beatn path to require it. Plus, my car rarely leaves the confines of Vancouver, so it's not like I need GPS to guide me through, say, downtown Los Angeles.
Brian Utley has written a short article explaining how GPS works, complete with nifty illustration:
The GPS systems consists of a constellation of 24 satellites circling the earth at an altitude of about 12,000 miles. Each satellite will orbit the earth twice a day, orbiting approximately the same position on each second orbit. This is important because it makes it possible to create a calendar of appearances for any given spot on earth.
Maybe I'll buy one of those badboys and set out to get seriously lost.
Comments Off