The comment I was replying to implied that checking with the inertial measurement system was an alternative to checking against GPS.
I still think I'll be surprised if accelerometers provide useful velocity information over timescales useful to a pilot. But maybe that's because I only have experience with cheap MEMS accelerometers from around 15 years ago.
I still think I'll be surprised if accelerometers provide useful velocity information over timescales useful to a pilot. But maybe that's because I only have experience with cheap MEMS accelerometers from around 15 years ago.