Does On-body Location of a GPS Receiver Matter?

We present an elaborate experimental study of the influence of device placement on the GPS location accuracy in three different mobile appliances: iphone 3gs, nokia n95 and nokia 810. On a total of some 52 km of walking traces we shaw that there are statistically significant difference in the errors between 5 on body locations: hand, front pocket of trousers, inner pocket of the jacket, inside a backpack. While the fact that such difference exists was well known before, this paper is the first to systematically study the effect.