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Number is a bit high but may be counting GPS, and EU GPS satellites you would have to block. You can "see" 4-12 GPS satellites at a time for one system. Assumin
by jabart 3y ago
Number is a bit high but may be counting GPS, and EU GPS satellites you would have to block. You can "see" 4-12 GPS satellites at a time for one system. Assuming the EU system has the same style layout.
- Jtsummers 3y agoYou don't need to block line-of-sight to the GPS satellites to create a GPS jamming attack. You just need a more powerful emitter near enough your intended target. No need for 30 planes trying to interpose themselves between the target and satellites.
- orangepurple 3y agoSuch a powerful jamming emitter is also a wonderful automatic target for loitering munitions
- Jtsummers 3y agoIf it's within a region that can be attacked and the opponent has those capabilities, yes.
- hef19898 3y agoIf you ask "the internet", the answer is drones. Regardless of the question being asked...
- orangepurple 3y agoRecently huge drone swarms have been launched recently to increase the chance of mission success.
- XorNot 3y agoAnd to hope your enemy doesn't just launch a couple of anti-radiation missiles at your most powerful radiation source nearby.
- londons_explore 3y agoYou do if the victim uses a phased array antenna. And any decent military receiver will do that, precisely to prevent jamming.
- throw0101c 3y ago> Number is a bit high but may be counting GPS, and EU GPS satellites you would have to block. All of which transmit on the same 3-4 frequencies: * https://gssc.esa.int/navipedia/index.php?title=GNSS_signal https://gssc.esa.int/navipedia/index.php?title=GNSS_signal so you'd only have to have high-power transmitters on those and you can block things. * https://gpsjam.org https://gpsjam.org Do it from a plane, or drone, and directional antennas become less effective as the jamming is coming from the same direction as the real signal (the sky).
- londons_explore 3y agoPhased arrays can have a beamwidth of 1 degree... Which means the enemy has to get their jamming signal within 1 degree of the victim and the satellite. And now you need to do that 30 times when there are 30 visible satellites.
- throw0101c 3y agoA phased array can transmit to with-in a small angle, but how does that help the receiver? It is still coming from "the sky", so if you have an airborne jammer (EW fighter, drone), how will the receiver what's signal and what's noise? I am aware of the spot beam functionality, which has higher power, which could help with overcoming noise: * https://en.wikipedia.org/wiki/GPS_Block_III#Military_(M-code) https://en.wikipedia.org/wiki/GPS_Block_III#Military_(M-code... The biggest recent help against jamming was the introduction of the L2C signal on a different frequency with the Block IIR-M satellites, and then the more powerful L5 signal on Block IIF.
- londons_explore 3y agoA phased array antenna can both transmit and receive within a small beam angle.