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So wouldn't inertial sensor be better
than GPS?GPS is very limited in accuracy because of the signal time delay, gravitational variances on the satelites, solar wind, satelite locations have to be re-calibrated frequently.(I don't know why they haven't automated that.)
But ring laser gyros, and nanoscale torsion arms are much more can even be used on high speed trains for accelerometers.(I don't care about monorails unless they are for extremely high speed.)As well, a 1225 kph train in an evacuated (perhaps underground) tunnel wouldn't be able to use lanned trajectories come into play here.
But vision guidance could be used, as well as possibly ultra low pressure aerodynamics and certainly safety-critical embedded ty like on a jet, not safety like on an unmanned missile.
As for usefulness, snow and rainstorms become 1+ extreme drag becomes weight and volume become nding to 10,000 ft runways becomes less l mass becomes less o space and passenger seating becomes more in transit is uctivity is increased.
And like missile design, all (and I mean all) forms of are heavily tax of the thousands of US airports are built from tax grants.