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There must be a formula
589 10 2018-9-5
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Dronin
lvl.4
Flight distance : 1688973 ft
Mexico
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As we all know the drone seems to get lower as it gets further away.  Even to maintain contact the further away you fly the higher you must fly.   In a relatively flat open area, how high must one be to maintain contact at 4 kilometers away.  Does anyone know the formula for distance to height?

2018-9-5
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thehippoz
Captain
Flight distance : 23 ft
United States
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In the city I can get around 6500 feet distance @ 170 ft up. Try 400 ft alt. Open farmland without wifi around shouldn't be a problem.
2018-9-5
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A CW
Captain
Flight distance : 13838848 ft
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United Kingdom
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DJI advise max flight altitude (120m) when maximising the range
2018-9-5
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MrArcher
Second Officer
Flight distance : 401706 ft
United States
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Logically I would think, all else equal, you should get less ground interference and more distance at 400ft altitude.
2018-9-5
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Dronin
lvl.4
Flight distance : 1688973 ft
Mexico
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MrArcher Posted at 2018-9-5 11:53
Logically I would think, all else equal, you should get less ground interference and more distance at 400ft altitude.

200 ft altitude flying above a street with normal buildings I recieved "weak remote signal" at 3000 ft  as I flew higher it cleared.  It was repeated at 300 ft and 5,000ft distance..    I believe it is related to the line of site angle...  I may be crazy. but it seems that one would need to be well over 400' agl to be 4 kilometers from the controller and have line of sight...
2018-9-5
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DJI Tony
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Hi, Thanks for your inquiry. The maximum distance would depend on your country and also the environment. There's should a strong GPS signal and no interferences to reach further distances when flying your drone. Please refer to the antenna for best practices as well to gain distance.

2018-9-6
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Dronin
lvl.4
Flight distance : 1688973 ft
Mexico
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DJI Tony Posted at 2018-9-6 11:38
Hi, Thanks for your inquiry. The maximum distance would depend on your country and also the environment. There's should a strong GPS signal and no interferences to reach further distances when flying your drone. Please refer to the antenna for best practices as well to gain distance.

https://www.youtube.com/watch?v=P7M9JtfVwQE

thank you.

sincerely
Steve
2018-9-6
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Hellsgate
Captain
Flight distance : 1991555 ft
Australia
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It all depends on many things. If you start from a flat level environment without any buildings or trees ie no obstructions you will certainly get further than say in a city or bush land.
If you can elevate your take of point say from a hill top then you can fly much further without having to gain altitude.
Ive flown out from a hill top at an altitude agl 35 meters for just over 5 klms still had strong signal.
I dont think there is a formula as every different location has its own set of variables that would need to be introduced that can effect your signal.
2018-9-6
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DJI Tony
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Dronin Posted at 2018-9-6 12:54
thank you.

sincerely

You're welcome. Please don't hesitate to reach us in any case you need our assistance. Thank you for the support.
2018-9-9
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thehippoz
Captain
Flight distance : 23 ft
United States
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Dronin Posted at 2018-9-5 13:46
200 ft altitude flying above a street with normal buildings I recieved "weak remote signal" at 3000 ft  as I flew higher it cleared.  It was repeated at 300 ft and 5,000ft distance..    I believe it is related to the line of site angle...  I may be crazy. but it seems that one would need to be well over 400' agl to be 4 kilometers from the controller and have line of sight...

It's weird but once I shielded all the rear motor wiring inside the mavic.. I believe my distances went up, not to mention it's practically immune from emi now. Here's a video I flew summer 2017- I know says published this year because I made it public on youtube then unlisted it back.

2018-9-9
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Dronin
lvl.4
Flight distance : 1688973 ft
Mexico
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Hellsgate Posted at 2018-9-6 13:53
It all depends on many things. If you start from a flat level environment without any buildings or trees ie no obstructions you will certainly get further than say in a city or bush land.
If you can elevate your take of point say from a hill top then you can fly much further without having to gain altitude.
Ive flown out from a hill top at an altitude agl 35 meters for just over 5 klms still had strong signal.

Thanks,   as I thought about it more I realized I had had a brain fart.   It is clear now.
2018-9-10
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