Submillimeter-Wave Atmospheric Transmission Measured at Ali in Tibet

A terahertz Fourier Transform Spectrometer (FTS) system is developed to measure the precipitable water vapor (PWV) at Ridge A of Ali observatory in western Tibet. The measurement has been carried out at the site since the winter of 2017. The measurement results, in good agreement with those based on the the reanalysis data from the satellites, suggest that this site is a good candidate for submillimeter astronomy.