CATS: an autonomous station for atmospheric turbulence characterization

Ziad, Aziz; Chabé, Julien; Yan, F.; Aristidi, Éric; Renaud, Catherine; Rahhal, Malak Ben

doi:10.1117/12.2313386

Cited by 13 publications

(16 citation statements)

References 12 publications

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“…In this goal, since 2015, the Observatoire de la Côte d'Azur (OCA) has built and installed a new generation station for atmospheric turbulence characterization on the Calern Observatory. The Calern Atmospheric Turbulence Station [1][2][3] (CATS) came out from a long and recognized expertise of the OCA/Lagrange Laboratory (OCA) in Atmospheric Optics. Indeed this laboratory played an important role in selection of the major astronomical sites over the world: GranTeCan (Canary Islands), Very Large Telescope (Chile), Southern Gemini (Chile), Keck, Northern Gemini & Subaru (Hawaii, USA).…”

Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

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CATS: continuous turbulence characterization station for both optical link and astronomical support

Giordano¹,

Ziad

Aristidi

et al. 2021

International Conference on Space Optics — ICSO 2020

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The optical turbulence measurement and characterization has become an essential information for optical link (telecommunication, telemetry, time transfert, ...) and for high-angular resolution imagining in astronomy. It has an impact on the quality, on the bit error rate of optical communication signals and it decreases the resolution of astronomical images. The J.L. Lagrange Laboratory of the Observatoire de la Côte d'Azur has a long and recognized expertise in atmospheric optics and turbulence for astronomical purposes. We have developed recently a new generation of autonomous instruments for daytime and nighttime atmospheric optical turbulence measurement. In 2015, a complete instrumental platform, the Calern Atmospheric Turbulence Station (CATS) has been installed at the Calern observatory. CATS is an automatic station equipped with a set of complementary instruments using original techniques for monitoring optical turbulence from the first meters above the ground up to the top of the atmosphere including the dome seeing. The station is based on four instruments. PML measures continuously the vertical profiles of the refractive index structure constant C 2 n with a high vertical resolution (∼ 100m at ground level). GDIMM monitors the wavefront coherence parameters (seeing, isoplanatic angle, coherence time, scintillation, wavefront coherence outer scale). A weather station provides the ground meteorological conditions (pressure, temperature, relative humidity, wind speed and direction). And the nighttime cloud fraction is given by an all-sky camera. Another instrument called INTENSE (INdoor TurbulENce Sensor) is occasionally associated with CATS station to measure the seeing inside the dome of the 1.5m MeO telescope to evaluate its contribution to the whole turbulence. A new tool has been integrated to CATS station consisting in a forecasting model using the Weather Research and Forecasting (WRF) system coupled to a turbulence model to predict daytime and nighttime meteorological and optical turbulence conditions for the next 48h.

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Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

“…The CATS station [1][2][3] (see figure 1) is a fully autonomous station working without human needs. It is composed of a set of complementary instruments allowing the measurements of both optical and meteorological parameters:…”

Section: The Calern Atmospheric Turbulence Station: Catsmentioning

confidence: 99%

CATS: continuous turbulence characterization station for both optical link and astronomical support

Giordano¹,

Ziad

Aristidi

et al. 2021

International Conference on Space Optics — ICSO 2020

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“…As presented in previous papers, 13,[17][18][19][20] the Calern Observatory is dotted, since 2015 the CATS station which measures the whole set of meteorological and turbulence parameters thanks to a new generation of complementary instruments:…”

Section: On-site Measurementsmentioning

confidence: 99%

“…We call this upgrade the site learning (SL) method. This work has been done on the Calern Observatory (France) where a turbulence station (Calern Atmospheric Turbulence Station: CATS [17][18][19][20] ) monitors, since 2015, the daytime and nighttime turbulence and meteorological conditions. The large database acquired during these years allows us to run statistical analysis and upgrade of the aforementioned empirical model.…”

Section: Introductionmentioning

confidence: 99%

Statistical learning as a new approach for optical turbulence forecasting

Giordano

Rafalimanana

Ziad

et al. 2020

Adaptive Optics Systems VII

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…Radiosondes have also been applied to study optical turbulence, and their information forms the basis for the calculation of C 2 n (C 2 T ) both in the ABL and in higher layers [10][11][12]. The vertical profiles of C 2 n can also be calculated from analysis of observations of both artificial and natural atmospheric and extra-atmospheric sources of optical radiation [13][14][15]. Scintillometers are widely employed for estimation of C 2 n at near-surface paths.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Structural Characteristic of the Refractive Index of Optical Waves in the Atmospheric Boundary Layer with Remote Acoustic Sounding Facilities

Odintsov¹,

Гладких²,

Kamardin³

et al. 2019

Atmosphere

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The structural characteristic of the refractive index of optical waves was calculated from experimental data on the microstructure of the temperature turbulence in the atmospheric boundary layer. The experimental data were obtained with an acoustic meteorological radar (sodar), ultrasonic anemometer–thermometer, and meteorological temperature profilometer. Estimates of the structural characteristics for different conditions in the atmospheric boundary layer are presented and were compared with model profiles.

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CATS: an autonomous station for atmospheric turbulence characterization

Cited by 13 publications

References 12 publications

CATS: continuous turbulence characterization station for both optical link and astronomical support

CATS: continuous turbulence characterization station for both optical link and astronomical support

Statistical learning as a new approach for optical turbulence forecasting

Determination of the Structural Characteristic of the Refractive Index of Optical Waves in the Atmospheric Boundary Layer with Remote Acoustic Sounding Facilities

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