That won't help in this case.Even if you lose connection like I did the location where it landed will be on the map. I just expanded the map, followed and found my drone on a front yard few blocks away.
Hey Meta4 - thanks for your time & info.Your drone shouldn't be losing GPS if it's out in the open with a good view of more than half of the sky.
But if it has lost GPS and then loses signal, there's only one place it will go.
That's straight down in autolanding +/- a little for drift with any wind there may have been.
From 178 feet, the autolanding should have taken 18 seconds which will limit how far it might have drifted while coming down.
Go to DJI Flight Log Viewer | Phantom Help
Follow the instructions there to upload your flight record from your phone or tablet.
That will give you a detailed report of the flight.
Come back and post a link to the report it gives you.
Or .. just post the txt file here.
The DJI Go app does not record data on signal strength as DJI Go 4 does.Going west I had it in view the whole time. Yet still lost the link. Going East there were a lot of trees between my and the bird, but at 137' not really too obscured. I think there is heavy Wi-Fi interference there.
Batteries degrade over time and don't last forever.
Do I need to be concerned about the battery cell deviation at a couple points? actually looks like I was hovering (0mph) the 2 times it shows in the log.
I noticed that on one of my flights yesterday. It wouldn't be surprising. I've had the batteries a long time and they've barely been used the past 3 years since I got the P4P.
But I do keep them 40~60% and check every 3 months on the charge.
I didn't think it was too bad, but now I am REALLY looking at the logs....Batteries degrade over time and don't last forever.
Those numbers look pretty good considering the age of the batteries.
Some deviations are normal.
Here's what Airdata says about cell voltage deviations:
Minor deviation is when a cell differs more than 0.01v from the other cells. The total amount of deviations per cell is then divided by the total amount of flight minutes, to get the number of minor deviations per minute.
Note that even a perfect battery would have minor deviations and it is normal. Lower values are better. Higher values may provide an early sign that the battery is not as efficient.
Major deviation is when a cell differs more than 0.07v from the other cells.
Please note that normal batteries can have a few of these.
An abnormal battery will:
A) Have most of the major deviations in one cell
B) There will be multiple major deviations per minute, and more than 10 total
C) The deviations continue longer than 1 minute
If your battery shows all symptoms (example, another) then this is considered a more severe case of an inefficient battery and may impact the battery life.
If your battery has only 1-4 instances on the same cell, don't worry too much about it. If it has 5-10 instances - then continue to track and make sure it does not degrade.
UPDATE!! FOUND !Well, finally happened. I first lost GPS, then connection to controller 3 min into a flight on a clear sunny day.
I'd turned on drone, waited a minute, took off & hovered about 10' until a got the GPS Homepoint lock, then rose to ~140', rotated around to view possible obstacles, (none nearby) as I was at West end of a decent size park, wanted to go a bit further west to show park in foreground. So rose a bit more and backed up a bit - then lost GPS, went into ATTI mode. Line of trees that had been behind me blocked immediate view of drone so I wasn't sure what direction to fly it back and wind was ~15mph.
While attempting to find my takeoff spot in camera, then lost connection, then the screen view went black.
Tried RTH, but of course, with no GPS and no connection to controller, that did not work.
Log says at 3min into flight, I was 311' away (wish I'd seen that immediately) and 178' height AGL. But it was drifting with the wind and by the time I lost connection it could have been quite far from where I was looking.
While totally bummed at losing my P4P, I am more concerned WHERE it went and how it came down.
Kind of dreading the official phone call "Mr. Ellis? Do you own a DJI Phantom 4 pro drone???"......
So immediately tried to find where & who to call to report it. Not an easy thing.
Did call local FSDO for O'Hare airport region. Voice mail. Left messages in 2 places there.
Did an online report with NASA Aviation Safety Reporting System.
And working on my Flight logs now.
What's my next move - as a Part 107 flyer?, I want to do the correct thing in reporting.
First time since I started flying in 2014 I had to do this.