No.Doesn't GPS show where North, South ... is ?
The Phantom needs to know which way it is facing for you to be able to control it properly, have RTH work properly etc.If the compass is only for the direction of the drone then how does that cause flyaways? You here about bad compass calibrations causing flyaways. Wouldn't letting off the sticks override it having the wrong direction info and just cause it to hover in place? And wouldn't putting it in homelock override that as well and bring it home?
GPS provides position, compass provides direction even when not changing position. You would think though that the AC could compensate for compass loss by using GPS as long as it was moving. It might be erratic as it tries to get it's true bearings but still would be better than no GPS at all.
As I was writing, I realized what the others were saying. Sure, the AC could determine it is moving north, but is it causing it's movement north or are external forces, hopefully only wind, moving it north? If external forces are causing movement, which way should the AC apply it's force? Forward? Aft? Your 3 o'clock? It could probably figure that out though by some trial and error as long as the wind isn't too bad.
The electronic compass ( or two for redundancy) will give your bird a direction input when the GPS cannot. If you're in a steady hover, you aren't moving relative to the GPS birds, it needs the relative motion to calculate direction and speed.
The GPS system requires a minimum of 4 satellites to give a good fix.2) Why need so many GPS Satellites before you take off ?
I always thought of GPS being ONE signal that tells me where I am on earth. That's latitude and longitude. I was assuming
you need more satellite s to locate it in space ? Right ?
Compass gives direction nose is pointing ONLY.The electronic compass ( or two for redundancy) will give your bird a direction input when the GPS cannot. If you're in a steady hover, you aren't moving relative to the GPS birds, it needs the relative motion to calculate direction and speed.
GPS provides position, compass provides direction even when not changing position. You would think though that the AC could compensate for compass loss by using GPS as long as it was moving. It might be erratic as it tries to get it's true bearings but still would be better than no GPS at all.
Thanks guys. What is AC ? !!! Air Craft ? I thought I knew all he acronyms of this hobby
It is clear as mud ( I didn't know that) that GPS is for position of the drone and compass is for direction. How does that translate to the sticks controlling the drone ?
1) Does YAW (mode 2, left stick left/right) only CHANGE the compass telemetry and NOT Compass telemetry ?
I am a retired Software/Firmware engineer and really like to know how the the bird flies from a Software point of view. I know it can differ from manufacturer to another, depending on how they implement their firmware.Thanks for pointing out how dji implements
So, let me ask and please reply according:
2) Why need so many GPS Satellites before you take off ?
I always thought of GPS being ONE signal that tells me where I am on earth. That's latitude and longitude. I was assuming
you need more satellite s to locate it in space ? Right ?
Thanks