There are lots of claims made for GPS signal jammers.
These have not been shown to work to date, IIRC.
The point would be to jam the missiles reception of the broadcast GPS signal, which it needs in order to know its own location. The missiles themselves would have the target coordinates loaded prior to launch.
The missile guidance system takes the missile location vs the target location and constantly updates the avionics to get the thing from point A to point B.
If Russia has effective GPS jammers these would be short range devices usable as point defense for a specific target zone.
I guess you didn’t view the video. Fact is, ALL GPS based systems can be jammed, by many methods. I will not discuss all the legs that can be cut. To date, the only guidance systems not susceptible to jamming are INS systems ( internal laser gyros) which are very expensive, and still must be “ corrected” for error over longer distances.
Ask me how I know, I used to be tasked daily with monitoring an INS systems “ drift”, up to .3 - 1.0 miles an operational hour. From memory, more than 3 miles an hour drift required replacing the very heavy IRU’s.
That said, international media has much about the Russian successes in jamming Ukie GPS systems. Enough to have our Pentagon voicing concern and re- evaluating our own systems… do remember when Iran brought down intact a very expensive US surveillance drone.
Do realize, the West is no longer fighting a bunch of goat herders.
Let me bring you up to speed.
https://spacenews.com/army-looks-for-alternatives-to-gps-as-enemies-threaten-to-jam-signals/
“ Army looks for alternatives to GPS as enemies threaten to jam signals
Gen. Murray: “We have to have multiple ways of getting PNT in the future battlefield because of the threat of jamming.”
Sandra Erwin
October 14, 2019”
Yes Johnny, our DOD has been aware of GPS jamming for awhile. You can do your own research as to what PNT systems are.
About 30 years ago a small aerospace company developed an artillery and mortar countermeasure. It detected an incoming round and then broadcast a signal to the fuze telling it the round was at the right height to detonate. The round would do so well before it was supposed to, rendering it much less harmful.