High quality dead reckoning over a long duration + an initial fix solves the reliable instantaneous absolute fix. So different technically but OP is correct it would be relevant to the problem of solving GPS jamming.
It absolutely does not. Dead reckoning has error that accumulates over time, and even "high-quality" dead reckoning will be beaten by a crappy GPS fix very quickly.
The dead reckoning I’m referring to (and I suspect op is too and seemingly you are as well), is the work being done by the military in the usage of submarines that stay submerged for extremely long periods of time. The error accumulated is many orders of magnitude less than traditional accelerometers + gyroscopes over the same time frame. The point is you can dead reckon within your error bounds even when GPS is unavailable and the accuracy from fusion will beat GPS by itself (not that that matters for the applications we’re discussing). For the duration of a flight it should be well within the capabilities of such sensors to dead reckon accurately from a last GPS fix before blackout and OP is correct this would be a complementary solution to more accurate clocks making it harder to jam GPS in the first place.
Indeed it’s being examined precisely for this application:
High quality dead reckoning over a long duration + an initial fix solves the reliable instantaneous absolute fix. So different technically but OP is correct it would be relevant to the problem of solving GPS jamming.
It absolutely does not. Dead reckoning has error that accumulates over time, and even "high-quality" dead reckoning will be beaten by a crappy GPS fix very quickly.
The dead reckoning I’m referring to (and I suspect op is too and seemingly you are as well), is the work being done by the military in the usage of submarines that stay submerged for extremely long periods of time. The error accumulated is many orders of magnitude less than traditional accelerometers + gyroscopes over the same time frame. The point is you can dead reckon within your error bounds even when GPS is unavailable and the accuracy from fusion will beat GPS by itself (not that that matters for the applications we’re discussing). For the duration of a flight it should be well within the capabilities of such sensors to dead reckon accurately from a last GPS fix before blackout and OP is correct this would be a complementary solution to more accurate clocks making it harder to jam GPS in the first place.
Indeed it’s being examined precisely for this application:
https://newatlas.com/aircraft/quantum-navigation-infleqtion-...