The Applied Astronomy Group of Yunnan Observatories, Chinese Academy of Sciences detected the laser echo signal from the lunar-surface reflector Apollo 15 for several times, which is the first successful LLR experiment nationwide in China.
On the night of Jan 22, using the 1.2-meter Telescope Laser Ranging System, the group detected the laser echo signal from the lunar-surface reflector.
LLR is to calculate the distance between the Earth and the Moon precisely, by measuring the time of the laser pulse traveling from ground station to the lunar reflector. It is a comprehensive technology covering a number of areas from laser, photoelectric detection, automatic control to space orbit, which is also currently the most accurate technique in Earth-Moon distance measurement.
http://www.thejakartapost.com/life/2018/01/27/yunnan-observatories-detects-echo-from-moon-reflector.html
