The effective layer height for star wandering and the accuracy of tilt sensing in multicolour laser stars
Astronomical Observatory of Padova, vicolo dell'Osservatorio 5, I–35122 Padova, Italy
2 CISAS, vicolo dell'Osservatorio 5, I–35122 Padova, Italy
3 Center for Astronomical Adaptive Optics, 933 N Cherry Ave. Tucson, U.S.A.
Send offprint request to: R. Ragazzoni
Accepted: 20 June 1996
Due to the finite height of the mesospheric sodium laser guide star, it is shown that the measurement of absolute tilt done with the multi–colour laser star technique is affected by an uncertainty depending upon the distribution. Two case studies for and meter telescopes are given.
Key words: atmospheric effects / techniques: miscellaneous / telescopes
© European Southern Observatory (ESO), 1997