Not sure what the big deal is with spoofing. So we encrypt our signal and we get a jammed encrypted signal, rather than a jammed non-encryped signal. Big deal, we miss either way, which is EXACTLY what the Washington Post is now reporting.
As to whether you want to believe them, that’s your choice, but unless you can give me a GOOD REASON to think they’re lying here, when everything else they write is PRO-UKRAINIAN, I will believe this article...rather than some FReeper that I know something about.
Jamming makes the missile somewhat less accurate. If it can’t lock enough satellites to get a GPS reading, missiles generally rely on inertial systems for guidance instead. So you get, say, 10m accuracy instead of 1m.
Spoofing fakes a satellite signal, in order to change the coordinates the missile thinks it’s at. So while the missile aims at your house, it’s location is offset and it actually lands in your neighbor’s yard down the street.
You don’t spoof and jam a missile at the same time, jamming defeats the point of spoofing, you’ll just jam the spoofed GPS also. However, Russia is likely using both in different locations. Jamming is easy but less effective, and also lets the world know where you are. Spoofing is safer and more effective, but much more difficult.