The GNSS/GPS jamming and spoofing are things that require counter-actions. Theoretically, GPS jamming and spoofing is quite an easy thing to do. The system must only make the signal that disturbs the GPS code. And that denies the GPS use. Another thing that can break the GPS is the plasma shield between the satellite and the ground station. Also, the hacked GPS signal can uncover the locations of opposite troops. That means the operators must find different ways to navigate.
In submarines and naval operations, the atom-clock-based navigation systems that search the changes in the Earth's gravity field can be tools that make GPS unnecessary. The system bases the weight that is calibrated for a certain point on Earth. Then the system follows changes in the weight that is on the libra. The system also follows time dilation in the atom clock.
The atom clock can also act as a chronometer. The system can measure the time that a submarine uses at a certain speed. When the submarine changes its course, that system makes the mark and then it starts to calculate and draw the new line. That gives the ability to measure the distance accurately. Along with inertia, this system gives very high accuracy to the system. The artificial intelligence can calculate the distance even if the submarine changes its speed and makes a zic-zac movement.
In some versions, the gestational photo-recon satellites stratospheric satellites, and drone swarms send images from the operational areas. Stratospheric satellite means. An airship or balloon that hovers in an atmosphere higher than aircraft but lower than satellites. Those systems can also equipped with counter-missile systems that make them less vulnerable to AA- and aircraft-launched missiles.
Same way satellites, or at least military satellites require anti-missile systems that can destroy incoming ASAT (Anti-satellite weapons). But the lasers. And other DEW direct energy weapons are changing that situation.
The own troops send laser signals upwards that those systems see. And then they can send the location of those troops to them. The weakness of those systems is that weather affects their abilities.
Another way is to use radar satellites that activate transponders that the ground forces use. The radar satellite sees if the area is under jamming because that jamming disturbs the image that it sends. The problem with active jamming is that the jammer system is vulnerable to anti-radar missiles. The system can send the 3D map image to the users. The problem is that this kind of system is possible to jam in similar ways. As the GPS itself. The drone swarm that hovers below the clouds can also track its own troops. The limited operational time is the problem with those systems.
When we think about things like GPS-guided weapons the TERCOM-inertial combination with the optical seeker, system can make guided weapons immune to GPS jamming. The system uses the 3D map that radar satellites create to navigate aircraft into the right position. Then the aircraft launches a weapon that uses an inertial (gyroscope) to navigate to visible range to the target. Then the nose camera uses the image that recon systems took of the target. And aims a weapon into it. The system is similar to that used in Javelin missiles.
https://bigthink.com/strange-maps/gnss-jamming/
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