Maximum height with no GPS

[chriscuk]

I'll try this. I have had a number of errors so anything might help

 

[DanMan32]

Its It's possible you have GPS lock but other aspects of the IMU are not ready yet. On my M2, when I get a delay, attempting to fly shows IMU not receiving attitude. IMUs can take some time to warm up. In P3 days, supposedly calibrating IMU when cold would speed up initialization.

 

[BerndM]

I appreciate that you are trying to help but I am fully aware of urban environments impacting GPS reception much like cloudy weather has an impact. Some of my tests that have taken over 2 minutes to get a GPS lock have been in a field a good 100m from any buildings and the only RF noise that I could pick up on the drone or my phone was my home WiFi. I didn't check for noise on 1.2ghz or 1.5ghz but it's the lock time that is really annoying I find. I sat there watching it go 5->9->10->12->9->10->12 satellites. I'm not sure but maybe the more expensive models have a-gps or something that gets them a better lock speed. If they at least cache its location they might get an assisted GPS log to help speed up location finding. It's why phones can get a much quicker lock as they'll have a complete database to cross reference rather than pure triangulation of the signals.

I take off from this point normally.

According to the general consensus from many scientific studies of GPS signals, the overwhelming conclusions are that CLOUDS have extremely little to no effect on the GPS signals.
There are countless uses of GPS in commercial aviation and military applications that would be useless if clouds were detrimental and dangerous to the users.

 

[tcope]

I see this as bad programming. DJI should allow flight above 16' with no GPS by simply having the user confirm from a pop up window that this is what they want to do. I was in a slot canyon and wanted to get some shots flying up and out of the canyon. Was not able to get good shots because of this.

 

[old man mavic]

According to the general consensus from many scientific studies of GPS signals, the overwhelming conclusions are that CLOUDS have extremely little to no effect on the GPS signals.
There are countless uses of GPS in commercial aviation and military applications that would be useless if clouds were detrimental and dangerous to the users.

i can concur with you, when i started flying some two and a half years ago with cheaper drones, it was the norm then, clouds affect GPS signals and i avoided flying on very cloudy days because that is what i was being told by the media,

so either todays drones are different ,or that theory was wrong ,because now it makes no difference to my satellite count or speed of lock, whether cloudy or clear sky, my first few flights with my MM were done ,on a very overcast grey day and it locked on to 12 sats with no issues

 

[chriscuk]

GPS accuracy won't be impacted by rain/bad weather but it will attenuate the signal meaning it'll be slower to get a locks there will be a weaker signal to work with.

The worst thing for GPS is when the mod are playing silly buggers with their jamming gear.