Letter to the Editor
Fixing the LGS tilt problem using tomography
Roberto Ragazzoni 1 and
François Rigaut 2
Received 15 June 1998 / Accepted 1 September 1998
We propose a simple scheme to solve the tilt indetermination problem in adaptive optics compensation with laser guide stars. This technique, providing tomographic turbulence analysis works, increases the area into which a tip-tilt guide star has to be found by approximately two orders of magnitude, boosting the sky coverage close to 100% at visible wavelengths. In addition, the proposed scheme provides a tilt measurement free of anisoplanatism error. It has numerous engineering advantages compared to other tilt retrieval techniques, as it does not require special auxiliary equipment nor an increased laser power.
Key words: adaptive optics atmospheric effects telescopes
This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 1998
Online publication: September 17, 1998