Multi-instrument characterization of optical turbulence at the Ali observatory

Adapting to the Atmosphere Conference 2014

物理学;地球科学

Liu, L.-Y.^1 ; Yao, Y.-Q.^1 ; Vernin, J.^2 ; Wang, H.-S.^1 ; Yin, J.^1 ; Qian, X.^1

National Astronomical Observatories, Chinese Academy of Sciences, Beijing

100012, China^1

Université de Nice-Sophia Antipolis, Observatoire de la Côte d'Azur, Laboratoire Lagrange, Nice Cedex 2

06108, France^2

关键词: Coherence time;    Instrument characterization;    Isoplanatic angles;    Micro thermal sensor;    Optical turbulence;    Optics application;    Seeing monitors;    Site evaluation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/595/1/012019/pdf
DOI  :  10.1088/1742-6596/595/1/012019

来源: IOP

【 摘 要 】

In order to characterize the atmospheric optical turbulence at Ali observatory, we have deployed multi-instruments, which are able to continuously monitor the optical turbulence for site evaluation. These instruments include the DIMM, MASS, Single Star SCIDAR and Polaris seeing monitor, and we also plan to install SNODAR and Micro-thermal sensors for the turbulence on surface layer by the end of this year. This configuration allows us to collect a substantial database and make cross-comparison of the results. We have successfully obtained the profiles of optical turbulence and wind speed with Single Star SCIDAR, as well as the key parameters for adaptive optics application, such as seeing, coherence time, and isoplanatic angle. The DIMM seeing measurements are also carried out simultaneously. The median seeing measured by the DIMM and SSS in 2013 is 0.69 and 0.79 arcsec, respectively.