Oh, I hadn't realized there was a power effect. Does more accuracy = more pings to the satellites?
Also, there are many spots where GPS doesn't work as well
Right. I occasionally use navigation when going somewhere after work, and I turn it on in the parking garage because I don't want to be fiddling with my phone while driving, and I'm used to getting weird or no directions until I'm on the street. There's also a stretch of a few blocks where it often cuts out because of tall buildings. Maybe the hills in Rome were a problem? (Not tall buildings, at least where we were.) Or maybe ancient gladiator ghosts think we moderns are soft and they're disrupting the signals. :-)
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Also, there are many spots where GPS doesn't work as well
Right. I occasionally use navigation when going somewhere after work, and I turn it on in the parking garage because I don't want to be fiddling with my phone while driving, and I'm used to getting weird or no directions until I'm on the street. There's also a stretch of a few blocks where it often cuts out because of tall buildings. Maybe the hills in Rome were a problem? (Not tall buildings, at least where we were.) Or maybe ancient gladiator ghosts think we moderns are soft and they're disrupting the signals. :-)