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How long to update Home Point
218 11 2019-12-24
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Dean01
Captain
Flight distance : 14833015 ft
South Africa
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How long does it take for your home point to become updated?

I came across a thread on this forum where it shows that the pilots home point was updated in about 7 seconds.

I was surprised to see that because i dont think it has ever taken so quick for me. I live in south africa and perhaps that has some thing to do with it?

I never actually timed how long it takes to establish links and record the Home Point but i know it is never quick (or so seldom that i do not remember).
Typically (despite years of flying) i am still often surprised how long it seems to take.
In fact on my very recent 1000th flight i actually turned all my equipment off and restarted everything again because Home Point was taking soo long that i thought there must be some problem.

Recently i was doing flight distance tests on my original old batteries (and new ones) and with each flight test it pained me (because i had set out to try improve my distance record and the time it takes to establish HP eats into the potential flight distance) to have to wait so long for satelite connection and for home point to become updated.


2019-12-24
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R&L Aerial photography
Captain
Flight distance : 298100 ft
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United States
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It takes anywhere between 15 to 30 seconds to update...
2019-12-24
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Dean01
Captain
Flight distance : 14833015 ft
South Africa
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R&L Aerial photography Posted at 12-24 02:47
It takes anywhere between 15 to 30 seconds to update...

cool - thanks -
i
2019-12-24
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KlooGee
Captain
Flight distance : 11146883 ft
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United States
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If things are working normally, and the device has a clear view to the full sky, the time to first fix (TTFF) is dependent upon time and distance from the last time it had a fix on its location. If you just finished one flight and are just swapping batteries, the ephemeris data is fresh and accurate, so the TTFF should be nearly immediate or within a few seconds. However, if it’s been a few days or you’ve traveled some distance since the last fix, the ephemeris will need to be inaccurate, and it will take a bit longer, but generally not longer than about 30 seconds unless you’ve moved it a long distance it it’s been a really long time since it last got a fix on its location.  

I’ve got a few different drones and they all work as described above.  The Mini seems to maybe be an exception. It seems to sometimes take a bit longer than I would normally expect to acquire a fix on its location even when just swapping batteries. But nothing crazy like what you describe.

Have you timed it?  Is so, how long?

https://en.wikipedia.org/wiki/Time_to_first_fix
2019-12-24
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Dean01
Captain
Flight distance : 14833015 ft
South Africa
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KlooGee Posted at 12-24 03:09
If things are working normally, and the device has a clear view to the full sky, the time to first fix (TTFF) is dependent upon time and distance from the last time it had a fix on its location. If you just finished one flight and are just swapping batteries, the ephemeris data is fresh and accurate, so the TTFF should be nearly immediate or within a few seconds. However, if it’s been a few days or you’ve traveled some distance since the last fix, the ephemeris will need to be inaccurate, and it will take a bit longer, but generally not longer than about 30 seconds unless you’ve moved it a long distance it it’s been a really long time since it last got a fix on its location.  

I’ve got a few different drones and they all work as described above.  The Mini seems to maybe be an exception. It seems to sometimes take a bit longer than I would normally expect to acquire a fix on its location even when just swapping batteries. But nothing crazy like what you describe.

thanks kloogee for concise explanation.

I fly mostly from the same location ontop some hills with no trees to obscure skyward - or any other infrastructure, electric or other wise which may other wise have some influence.

I am going to pay proper attention today and see how it goes and how long it takes.
2019-12-24
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DAFlys
Captain
Flight distance : 933993 ft
United Kingdom
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Mine varies up to a minute.  I also wait for 11 satellites too.
2019-12-24
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Niknik
First Officer
Flight distance : 585262 ft
Greece
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The home point is almast instant the problem for the delay is the gps takes somw time to become active
2019-12-24
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RK7dronzy
First Officer
Flight distance : 495217 ft
United Kingdom
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Yes after gps locks on up to a minute then home point records, if not reboot both controller and craft.
2019-12-24
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Dean01
Captain
Flight distance : 14833015 ft
South Africa
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DAFlys Posted at 12-24 03:53
Mine varies up to a minute.  I also wait for 11 satellites too.

thanks - thats about how long i sometimes wait - i also wait for  stable 11 satelites minimum
2019-12-25
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Dean01
Captain
Flight distance : 14833015 ft
South Africa
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RK7dronzy Posted at 12-24 08:46
Yes after gps locks on up to a minute then home point records, if not reboot both controller and craft.

thanks , yes, on the odd occassion it takes longer than normal then i shut all equipment down and restart - has worked properly again every time after a restart
2019-12-25
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DJI Paladin
Super Moderator
Flight distance : 318 ft

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Hi. Thank you for reaching out to DJI Forum. With regards to this inquiry. The time it takes to update the Home Point of your DJI Mavic Pro will depend on the strength of the signal and how fast you can connect to multiple satellites ( at least around 10 satellites will be good ) to successfully register the Home Points and take off. Thank you,
2019-12-27
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DowntownRDB
Captain
Flight distance : 525 ft
United States
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On the Mavic Mini once i get GPS lock it takes upwards of a full minute for the home point to record.  This is in an open field with full view of sky.
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