[OM2009] airplane mode

Helge Hafting helge.hafting at hist.no
Mon Jun 29 14:56:56 CEST 2009

jeremy jozwik wrote:
> window seat makes no difference : )
> in fact for several minuets i was holding my freerunner against the 
> window and got nothing...

My experience is that a window seat is necessary. If I have a fix, I 
loose it by moving the phone half a meter away from the window. So it 
almost have to touch the glass all the time.

To get the fix quickly, aquire a good fix outside the plane shortly 
before you board it. Then, stop the gps software. It will save satellite 
ephemeris information so it can be reused when you're inside the plane.
Without this, ephemeris has to be downloaded from the satellites before 
the first fix - but downloading requires better signal quality than 
merely tracking. You may or may not get the better quality signal inside 
the plane.

Helge Hafting

More information about the community mailing list