  A Single Star Scidar system(SSS) has been developed for remotely sensing
atmospheric turbulence profiles. The SSS consists of computing the spatial
auto/cross-correlation functions of short exposure images of the scintillation
patterns produced by a single star, and provides the vertical profiles of
optical turbulence intensity C2n(h) and wind speed V(h). The SSS needs only a
40 cm aperture telescope, so that can be portable and equipped easily to field
candidate sites. Some experiments for the SSS have been made in Beijing last
year, successfully retrieving atmospheric turbulence and wind profiles from the
ground to 30 km. The SSS observations has recently been made at the Xinglong
station of NAOC, characterizing atmospheric parameters at this station. We plan
to automatize SSS instrument and run remote observation via internet; a more
friendly auto-SSS system will be set up and make use at the candidate sites in
Tibet and Dome A.
