JJB*
Core User of DJI
Flight distance : 12566335 ft
Netherlands
Offline
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Labroides Posted at 9-19 13:03
You've lost me.
The satellite numbers were low.
The amount of sky was heavily reduced by buildings, giving a poor spread of the satellites that were visible.
You've lost me.Oops, sorry will bring you back
The satellite numbers were low.
True, but not to low to get a GPS lock, 7, 8 or more can give a GPS lock, even with a low 0-5 number.
DJI software knows this too, as with bad GPS max height is limited (with or without vision in use), so the change form 5 to user max height 500 meter shows that some part of the flight GPS was not that bad.
The amount of sky was heavily reduced by buildings, giving a poor spread of the satellites that were visible.
In theory yes, high building obscure sats, but guess we both don`t know wich sats in the sky and their positions were received.
As said, switching to back from 5 to 500 user meter max height does say it all about GPS reception.
The flight controller calculated the GPS reliability 2/5 and too low to record a home point.
True, need 4 or 5 to get HP to be set, but without HP being sat DJI drones can have a GPS lock.
The app didn't record GPS data or it recorded the same point despite drone movement.
Indeed, but with bad GPS reception normally data is written in the log, only the LatLon positions doesn`t show the actual positions.
In this log GPS lat lon is for many records the same , a copy paste action of phantomhelp if data is not there.
Question is why not ?? As in the log you can see if GPS is used or not. GPS was uses part of the flight.
But you suggest everything was fine onboard and the drone was able to fly normally?
Nah, i do not suggest that. But data shows that at25s drone was flying in Sport mode with nose down and forward stick at 100% shortly.
GPS sats 8 and 9. After releasing stick brake action, nose up, reduce speed, nose down, nose normal to hover.
Only possible if there is a GPS lock !
Acc meters does not do this, same for attitude measurement by the system.
Plus if GPS is unreliable for the sofware, it will switch to ATTI mode. It did not in this flight.
But agree, not a clever flight to do so...
cheers
JJB
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