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In the past few years, Chinese astronomical community is actively testingastronomical sites for several new optical/infrared ground-based telescopes.These site testing campaigns conducted were mainly focused on fundamentalperformances of the site, such as cloud coverage, seeing, temperature, etc.With increasing interests in sodium laser guide star adaptive optics for thesenew telescopes in the Chinese astronomical community, it is interesting toinvestigate the performance of the laser guide star at these sites, especiallyconsidering that the sodium laser guide star's on-sky performance issignificantly influenced by sites' local performances, such as geomagneticfield, sodium layer dynamics, density of air molecule, etc. In this paper, westudied sodium laser guide star's performance of a 20W class Quasi-CW pulsedlaser developed by TIPC with numerical simulation for five selected sites inChina.

Numerical study of a 20W class QCW pulsed sodium guide star laser's performances at five sites in China