Seeing measured by DIMM reflects the adverse effect on observations from the total atmospheric turbulence above the instrument. After seeing has been monitored at Dome A for a few years, we plan to measure the vertical turbulence profile, which enables us to understand the observing conditions better and is essential for the development and operation of future adaptive optics instruments. A...
All-sky cameras are widely used in site testing, fireball triangulation, meteorite recovery, and time-domain astronomy. However, they intrinsically require optics with nonlinear projections, making it challenging to use traditional astrometric and photometric methods. Based on the all-sky camera KunLun Cloud and Aurora Monitor (KLCAM) in Dome-A, we have developed a method to analyse cloud...
The light at wavelength around 1.4 μm is heavily absorbed by water vapor in the atmosphere， creating a spectral gap between the J and H bands. However, Dome A’s exceptionally dry conditions provide a unique opportunity for observations in this band. We developed a custom 1.4 μm filter (1.34 to 1.48 μm), similar to JWST’s F140M filter. After initial testing in Daocheng, China, the filter...
Antarctica is the perfect site for infrared (IR) astronomy, especially at inland sites. At Concordia station, previous observations have shown that the air is cold and dry, such that the IR background at 2.4 micron is only 1% compared to sites at temperate latitudes. Leveraging this "K dark" window unique to Antarctica, we are planning to install a 26-cm fully cryogenic wide-field (16 sq deg)...
