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With the help of multi-aperture scintillation sensor (MASS) technology applied on small telescopes, a profile monitoring instrument for atmospheric optical turbulence intensity is developed. It will be deployed at Saishiteng Mountain in China for optical turbulence parameters measurement in 2022, where can be candidate site for the Chinese 12-meter Large Optical-infrared Telescope (LOT). The instrument is configured to sample the turbulence with elevations above 500m with a low-resolution. It is different from the classic MASS developed by Cerro Tololo Inter-American Observatory(CTIO), we use EMCCD as the spatial filter and the detector instead of concentric annular apertures and photomultipliers. We provide technological particulars of the archetype and describe a parallel comparison test of two MASS systems conducted at Xuyi Observatory in Novermber, 2021, showing the combined observation accuracy of the detection allowed by the MASS instruments is better than $0.02"$ and the intensity $C_n^2(h)dh$ of a single turbulence layer is better than $10^{-14}m^{1/3}$. In addition, the Differential Image Motion Monitor (DIMM) as well as two Lunar Scintillation (LuSci) systems were also conducted in this comparison test. The combination of DIMM and MASS permits to investigate integral turbulence intensity in ground layer, and we offer instances of the measurement results and compared it to LuSci. |
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