Engineering · Aerospace Engineering
Researchers used changes in the upper atmosphere recorded by distant ground stations to estimate vertical movements caused by the magnitude 7.7 Myanmar earthquake. Three distinct signal peaks helped identify the locations and relative strengths of acoustic waves linked to uplift along the fault.
Two room-temperature lutetium-ion clocks achieved fractional frequency uncertainties near one part in 10¹⁹ and agreed in a direct comparison. The result supports efforts to improve international timekeeping and develop a future definition of the second.
Scientists describe a global method for GPS-like navigation that avoids relying on a central processing hub. Using experiments with hundreds of widely distributed IGS stations, the approach produced satellite correction products similar to centralized baselines, while converging faster and cutting communication compared with other decentralized designs.
