Rudestuff, While this is theoretically an issue with mobile phone towers, as you normally, hopefully, fly a fair distance from them the interference received is at a very low level.
This is because the power received decreases with the square of the distance from the transmitter, (inverse square law) so although they are higher powered they induce less interference than a phone a few inches away from your wiring harness.
More of an issue are TV transmitters. I have recorded GPS tracks which are wildy wrong when flying a mile or more from the Winter Hill TV transmitter which radiates 500kw. Mobile phone towers radiate a tiny fraction of this power. (Not sure how many watts, but not many)
edit:I just did a google search and came up with a figure of 1.6 kw. for a mobile phone tower.
Last edited by Gaseous; 29th April 2006 at 08:32.