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21. http://www.eso.org/sci/libraries/SPIE2012/8450-61.pdf
The ESO transportable LGS Unit for measurements of the LGS photon return and other experiments D. Bonaccini Calia1a, I.Guidolina, A.Friedenauerb, M.Hagerb, V.Karpovc, T.Pfrommera, R. Holzlhnera ... Communications Montreal, Quebec, Canada d Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monte Porzio Catone (RM), Italy ABSTRACT Sodium laser guide stars ( ... Moreover we propose measurements of relative LGS RF at Mauna Kea with the WLGSU and the four different pulsed lasers on site. ...