Real-time Strehl and image quality performance estimator at Paranal Observatory

Dimitri Mawet; Alain Smette; Marc S. Sarazin; Harald Kuntschner; Julien H. Girard

doi:10.1117/12.2057263

7 August 2014 Real-time Strehl and image quality performance estimator at Paranal Observatory

Dimitri Mawet, Alain Smette, Marc S. Sarazin, Harald Kuntschner, Julien H. Girard

Proceedings Volume 9148, Adaptive Optics Systems IV; 91484T (2014) https://doi.org/10.1117/12.2057263
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Here we describe a prototype Strehl and image quality performance estimator and its integration into Paranal operations, starting with UT4 and its suite of three infrared instruments: adaptive optics-fed imager/spectrograph NACO (temporarily out of operations) and integral field unit SINFONI, as well as wide-field imager HAWK-I. The real-time estimator processes the ambient conditions (seeing, coherence time, airmass, etc.) from the DIMM, and telescope Shack-Hartmann image analyzer to produce estimates of image quality and Strehl ratio every ~ 30 seconds. The estimate is using ad-hoc instrumental models, based in part on the PAOLA adaptive optics simulator. We discuss the current performance of the estimator vs real IQ and Strehl measurements, its impact on service mode efficiency, prospects for full deployment at other UTs, its use for the adaptive optics facility (AOF), and inclusion of the SLODAR-measured fine turbulence characteristics.

Citation Download Citation

Dimitri Mawet, Alain Smette, Marc S. Sarazin, Harald Kuntschner, and Julien H. Girard "Real-time Strehl and image quality performance estimator at Paranal Observatory", Proc. SPIE 9148, Adaptive Optics Systems IV, 91484T (7 August 2014); https://doi.org/10.1117/12.2057263

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