I’ve been doing some cycling Mapillary sequences the past couple of days, and I’ve been using my new Xiaomi Yi, which I have not used on a bike much yet. I’ve been carrying a spare power bank and cable so that when the camera battery gets low I can charge on the go.
However, I’ve been noticing that when I have the camera plugged in, my GPS accuracy drops precipitously. It’s most obvious in areas which are already difficult for a GPS, like under trees or going around fast corners (takes a second for the route to ‘catch up’, so to speak).
So a couple questions: is this confirmation bias? Am I seeing a drop in accuracy because I think it should be there? Or has anyone else had this same problem? To clarify, my GPS sits right above the camera on a K-Edge mount. When I remove the GPS and hold it away from the camera, the route jumps back into position.
Secondly, does anyone have ideas of how to mitigate this? I was thinking a Faraday style barrier between the two devices might help… I cannot reasonably move the GPS, and I’m not sure where I could move the camera.
Unrelated, but I also noticed the effect that high-power overhead cables can have on the GPS.
EDIT: I did some quick and dirty testing. Signal strength drops when the camera is on, let alone charging or taking pictures, although those seem to be a little worse. Shielding with many layers of aluminum foil between the GPS and camera seemed to help a little bit, but I’m not sure if it’s shielding the GPS to some extent as well, which defeats the purpose.