Univ. of Bristol achieved sub-mm ranging accuracy over 400m in daylight using classical lasers that mimic energy-time entanglement correlations via optical fibres & modulators—no quantum light needed. Published in Nature Communications.
#QuantumSensing #LaserRanging #News
NASA lasers confirm accelerating global sea‑level rise
NASA’s satellite laser ranging shows global mean sea level has risen about 3.5 inches since 1993, with the rate sharply accelerating over the past two decades. Read more: getnews.me/nasa-lasers-confirm-acce... #sealevelrise #laserranging #climatechange
2/8 Current technique: Fire a laser pulse at corner-cube reflectors left on the Moon by Apollo missions. Time the round trip to calculate distance.
Problem: Only a few photons return per pulse, limiting precision to about 5-10 millimeters.
#Apollo #LaserRanging
