Phys.org November 9, 2918 At extremely low temperatures, the atoms behave in a ‘quantum’ way, acting like both matter and waves. As the atoms fall, their wave properties are affected by the acceleration of the vehicle. Using an ‘optical ruler’, the accelerometer is able to measure these minute changes very accurately. Making use of this phenomenon researchers in the UK have demonstrated a transportable, standalone quantum accelerometer. The current system is designed for navigation of large vehicles, such as ships and even trains. However, the principle can also be used for fundamental science research, such as in the search for […]
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New technique locates robots, soldiers in GPS-challenged areas
Science Daily October 9, 2018 Researchers at the US Army Research Laboratory have developed a technique for determining DoA of a radio frequency signal source based on an algorithm that statistically models the received signal strength (RSS) gradient and controls for spatial outliers and correlations. When the signal is extremely noisy, the estimator correctly outputs that no DoA is present and the output is an estimated DoA and associated uncertainty. The technique works in conditions of heavy multipath, does not require any fixed infrastructure, does not rely on prior training data, knowledge about the environment, multiple antennas, or prior calibration […]