Iran begins attack, launching dozens of drones that'll take hours to arrive

[u/Currymvp2]

https://www.timesofisrael.com/liveblog_entry/report-iran-begins-attack-on-israel-launching-dozens-of-drones-thatll-take-hours-to-arrive/

[u/flag_ua]

Those are probably being jammed too. All of these systems basically just work by satellites screaming their position and time, while the receiver does the math to triangulate its position. Jamming these systems just means making something that pretends that to be those satellites, by screaming false position and time data

[u/Psshaww → u/flag_ua]

I would figure they used encrypted military signals so you can’t just spoof it

[u/[deleted] → u/Psshaww]

Doesn't matter how well encrypted your message is if your destination can't hear it because of noise. Jamming is basically blaring a soundhorn in a conversation, doesn't matter witch language is being spoken.

[u/Psshaww → u/[deleted]]

Wonder if there's some directionality built in that only looks for a signal emanating from above it, where a satellite would be, and ignore a jammer that's below the aircraft.

[u/RecentlyUnhinged → u/Psshaww]

Doesn't really work like that because satellites move horizon to horizon, they don't just sit above you (GEO not withstanding ofc).

Meaning there's plenty of instances where a sat you want to talk to is low above the horizon, where as the aircraft jamming you is "above" it.

Edit: just saw you were referring to GPS rcv's on airborne assets too. Still doesn't work for much the same reasons, including that the equipment to identify where the signal is in relation to you adds a ton of weight and complexity.