About all somewhat advanced military systems do some kind of "augmented dead reckoning", including what you suggest. Civilian systems are usually not designed

About all somewhat advanced military systems do some kind of "augmented dead reckoning", including what you suggest. Civilian systems are usually not designed to work in a hostile environment, not only it is costly for a situation that is unlikely to happen in normal use, but authorities usually don't like it when such technology is available to the public. As a result, it tends to be classified. They want to be keep the advantage over enemies and criminals.