jeffreyt:
"I can tell you that a GPS signal is a 50 watt signal from a satellite 20,000 miles in space. The am/fm radio bands are 50,000 watt signals, or much greater, from a much shorter distance."


FYI, the problems with operating electronics inflight are the emissions from the device (in
this case, the receiver). Quoting the transmitter power does nothing to relate to the problems
with the emissions from the receiver (usually due to the local oscillator).

So, unfortunately, your figures do not relate to this situation.

As the GPS site link (earlier in the thread) says, there are documented cases of interference
from AM/FM radios. My concern is about the LO (local oscillator) emmissions in GPS receivers ,
which are much higher in frequency than for AM/FM radios, and may be more problematic.
.
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