GPS hook up

[bafi]

I notice that the Movi uses a GPS to help keep the horizon level in extreme moves. Is there a need to hook up a GPS to the Carvec system (is it even possible to do this?) in order to do the same? Many thanks.

[JohnC]

The movi controller is  a converted multirotor autopilot which has the GPS like most others. The GPS 'feature' is basically carried forward as a marketing ploy.

I can only imagine it to be any use when you are constantly accelerating or doing a long, sustained turn. There are many other issues involved with an IMU to track attitude angles which I think are the most important for 99% of the uses people put these things to.

There are other issues which raise questions too : to use GPS, you need compass heading as well as GPS velocity. Quite how well a compass will work under that camera tray next to all that metal and electronics of the camera (and maybe in a car) I don't know. If the compass is not accurate, the GPS will make the IMU worse, not better.

Having said all that we already have experience to integrate a GPS from the CARVEC autopilot - but at this time I'm not convinced it is useful in the real world. I'm waiting to learn of real users experiences and see their videos for the Movi. At the moment I have only seen videos from people who are involved with Freefly.