Abstract
The recovery of absolute tip-tilt information from a LGS-based adaptive optics system is (together with conical anisoplanatism) one of the open problems that the LGS community is faced with. Here a number of approaches are discussed in some detail. While there is no evidence that some specific technique is clearly better than the others, it is pointed out that more investigation is still required to assess the performance and to eventually point out some new uncovered schemes. The first experimental evidence of how some technique really work are also reported.
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Ragazzoni, R. (2000). Laser Guide Star Advanced Concepts: Tilt Problem. In: Ageorges, N., Dainty, C. (eds) Laser Guide Star Adaptive Optics for Astronomy. NATO ASI Series, vol 551. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9624-4_7
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DOI: https://doi.org/10.1007/978-94-015-9624-4_7
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