Phantom 4 losses satellite signal mid flight any idea what can cause this ?

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This is my first time to experience this with my P4
I was flying FPV from home , and all of sudden the Mode switched on the screen to atti , I examined the flight record , and I found deterioration of the number of satellite in certain place from 14 to 10 to 7 then to 0 , I was not under a bridge or any overhead structure , it was an open area "Walmart parking lot " the gps signal came back in few seconds then went off again , so I decided to hit Return home once I got the gps again . I do fly Atti some times but I do that intentionally with full gps signal.
I included the flight log down here.
The lost gps signal around the 5 minute of the flight


Phantom Log Viewer - PhantomHelp.com




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Have you done any mod on your AC?


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Where are you? There are scheduled GPS interruptions on the east coast near the Carolinas due to military operations.
 
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Where are you? There are scheduled GPS interruptions on the east coast near the Carolinas due to military operations.
How can people find out about these GPS interruptions and other NOTAM worthy stuff before they happen?
 
Read cozy Canucks post. There's quite a lot of info on this. Same thing happened to him. Turns out it was warranty issue


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Geo magnetic storms caused by coronal mass ejections shocking the earths magnetic field and causing interference across all radio and microwave bands


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As explained this could be caused by atmospheric conditions. If this continues to happen regularly though I'd contact DJI as it would indicate a hardware issue of some kind.
 
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As seen in the log I am in Dallas Texas and yes I fly with this P4 since I got it about 45 hours , first time this happened


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K-Index was at 6 today.
I never fly when K-Index is above 4.

F3honda4me
As explained this could be caused by atmospheric conditions. If this continues to happen regularly though I'd contact DJI as it would indicate a hardware issue of some kind.

I use this app regularly (Android)

K-Index monitor - Android Apps on Google Play

Or..
iOS

Sun Activity (kp-index) on the App Store


K-INDEX is currently at 5


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