3 ms·
But after a few tens of meters in the air we see a noise signal. [...] The noise signal is on GPS L1 (1575.42 MHz) with 1 MHz bandwidth, see Figure 3-5. So the
by danbruc 9y ago
But after a few tens of meters in the air we see a noise signal. [...] The noise signal is on GPS L1 (1575.42 MHz) with 1 MHz bandwidth, see Figure 3-5.
So the signal is jammed by something sending a noise signal around the L1 frequency, whether intentionally or not.
- Animats 9y agoLook at the screenshot from the spectrum analyzer. That's a very specific signal, uniform in power, centered on the L1 frequency, and contained to a 1MHz bandwidth. That's intentional, not some random event.
- danbruc 9y agoIt surly looks like intentional jamming but I did not want to draw any conclusions that are not in the source. It certainly does not look like any random event but it could still be unintentional, e.g. someone just forgot to turn of his GPS jammer or accidentally broadcasts on that frequency, but that is admittedly not the most plausible explanation. I am also not sure how big a deal the whole thing is, I would assume that GPS jamming is not too uncommon to protect potential high profile target.
- jhayward 9y agoThe jamming is very highly specific to GPS. Chances of it being unintentional are miniscule.