Re:Quantum Physicists Found a New, Safer Way to Navigate
by bee_rider on Thursday August 08, 2024 @10:00AM
(#41191620)
Sure, I’m not saying it is a GPS replacement or anything.
But, a measurement of absolute position is a fundamentally different thing from trying to figure out a position by integrating from an IMU, right? The latter inevitably accumulates errors. The former should not accumulate error. The measurements might be extremely noisy, but noisy and error accumulating are different from a signal processing point of view.
Re:Quantum Physicists Found a New, Safer Way to Navigate
by pclmulqdq on Thursday August 08, 2024 @11:39AM
(#41192712)
The magnetometer's reference data is so inaccurate for positioning and shifts so much that error will still accumulate.
Magnetometers have been used in IMUs for over 50 years. Their shortcomings have little to do with the precision of the instrument.
Re:Quantum Physicists Found a New, Safer Way to Navigate
by roelschroeven on Thursday August 08, 2024 @10:29AM
(#41191933)
(I think you meant to say "The former should not accumulate error" instead of the latter.)
The subtle parts of the magnetic field of the Earth shift a lot related to the movement of metal through the mantle. NOAA and the DoD periodically create new maps of the magnetic field, but they have a lot of error and noise.