Wow, that makes it really interesting. The huge problem with GPS is height information. My GPS devices have commonly 10-15 m practical error in height on cities (urban canyon effect).
This could be very interesting for tunnel inertial navigation as makes the inertial problem a 2d issue from 3d.
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"*and a freakin' barometer?!"
Wow, that makes it really interesting. The huge problem with GPS is height information. My GPS devices have commonly 10-15 m practical error in height on cities (urban canyon effect).
This could be very interesting for tunnel inertial navigation as makes the inertial problem a 2d issue from 3d.
"Warning, there's a storm coming. You should probably put your $800 tablet in a bag so it doesn't get wet."