Absolute tip-tilt determination with laser beacons.

Details Absolute tip-tilt determination with laser beacons. Absolute tip-tilt determination with laser beacons.

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...305l..13r&link_type=abstract

Astronomy and Astrophysics, v.305, p.L13

Physics

Optics

22

Adaptative Optics, Laser Stars

Scientific paper

It is shown that the absolute determination of the tip-tilt can be inferred from two artificial laser beacons in the high atmosphere (e.g. in the Sodium layer) generated from two ground stations located away from the observing place.The technique is limited by the required Field of View for such a telescope. Assuming a retro-fit to existing telescopes, the technique is feasible only for small (D~4m) telescopes in very good seeing conditions (r_0_=0.20m). The applicability to largest telescopes or worst seeing condition is possible in some cases with a dedicated telescope's optics.

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