Xiangqun Cui

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The PLATeau Observatory (PLATO) is an automated self-powered astrophysical observatory that was deployed to Dome A, the highest point on the Antarctic plateau, in 2008 January. PLATO consists of a suite of site-testing instruments designed to quantify the benefits of the Dome A site for astronomy, and science instruments designed to take advantage of the(More)
In 2008 January the twenty-fourth Chinese expedition team successfully deployed the Chinese Small Telescope ARray (CSTAR) to Dome A, the highest point on the Antarctic plateau. CSTAR consists of four 14.5 cm optical telescopes, each with a different filter (g, r, i, and open) and has a 4:5° × 4:5° field of view (FOV). It operates robotically as part of the(More)
The i-band observing conditions at Dome A on the Antarctic plateau have been investigated using data acquired during 2008 with the Chinese Small Telescope ARray (CSTAR). The sky brightness, atmospheric extinction, cloud coverage and auroral appearance are obtained from these images. The median sky brightness of moonless nights is about 20.46 mag arcsec in(More)
The high altitudes and extremely low temperatures of the Antarctic plateau result in an exceedingly low atmospheric water vapor content. In this article we estimate the precipitable water vapor at Dome A using optical spectra of the diffuse solar irradiance in the zenith direction. The spectra were obtained from the Nigel spectrometer at Dome A during 2009.(More)
Curvature wavefront sensing usually requires the measurement of two defocused images at equal distances before and after the focus. In this paper, a new wavefront recovery algorithm based on only one defocused image is proposed. This algorithm contains the following four steps: response matrix calculation, establishment of intensity distribution equations,(More)
The CNC cutting machine is the core of the CAD/CAM system and automation production line of clothing and textile industry. In this paper, propose an arc tangent interpolation algorithm for CNC cutting machine that realizes simultaneous angle control of the knife during the interpolation process and avoids complex calculation. The simulation of an arc(More)
Snodar is a high resolution acoustic radar designed specifically for profiling the atmospheric boundary layer on the high Antarctic plateau. Snodar profiles the atmospheric temperature structure function constant to a vertical resolution of 1 m or better with a minimum sample height of 8 m. The maximum sampling height is dependent on atmospheric conditions(More)
Nigel is a fiber-fed UV/visible grating spectrograph with a thermoelectrically-cooled 256 1024 pixel CCD camera, designed to measure the twilight and night sky brightness from 300 nm to 850 nm. Nigel has three pairs of fibers, each with a field-of-view with an angular diameter of 25 degrees, pointing in three fixed positions towards the sky. The bare fibers(More)
A dual-channel lateral shearing beam splitter was used in a Fourier transform imaging spectrometer, forming a dual-channel imaging spectrometer, to investigate the usability of this technique for large field-of-view (FOV) spectral detection. The large FOV obtained by stitching together the different channels' individual FOVs greatly improved the spectral(More)
For continuous observation at locations that are inhospitable for humans, the desirability of autonomous observatories is self evident. PLATO, the ‘PLATeau Observatory’ was designed to host an easily configurable instrument suite in the extremely cold conditions on the Antarctic plateau, and can provide up to 1 kW of power for the instruments. Powered by(More)