Bibcode
Delgado, José Miguel; Jiménez Mejías, David; Rodríguez Ramos, Luis Fernando; Vázquez Ramió, Héctor
Referencia bibliográfica
Adaptive Optics Systems II. Edited by Ellerbroek, Brent L.; Hart, Michael; Hubin, Norbert; Wizinowich, Peter L. Proceedings of the SPIE, Volume 7736, pp. 77364U-77364U-7 (2010).
Advertised on:
7
2010
Número de citas
0
Número de citas referidas
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Descripción
During the last 20 years, many DIMM instruments have been developed to
measure astronomical seeing. The IAC has been involved in several
projects to run different campaigns to characterize its observatories.
However, the cost in manpower to maintain and operate these instruments
has been too high and it is mandatory to minimize this effort by
constructing a reliable, robust and available seeing monitor. A review
of all sources of errors has been done in order to fit very reliable
measurements: acquisition parameters, box size, signal threshold, SNR
threshold, flux, deformations and vibrations for centroid calculations,
best pixel scale, jitter in the images sampling, light bandwidth, CCD
noise, as well as the centroid calculation algorithm. Experimental
measurements about the influence of exposure time, number of images for
computing the seeing or defocus have been carried out to identify the
practical limits of the instrument. The IAC automatic DIMM design has
been reviewed to improve its robustness and its availability to
guarantee the minimum down-time and to maximize the time between
failures. The new design will be shown as part of this work.