Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001acasn..42..101q&link_type=abstract
Acta Astronomical Sinica, vol.42, no.1, p.101-111.
Astronomy and Astrophysics
Astronomy
5
Site Survey, Three Sub-Aperture Dimm, Seeing
Scientific paper
The seeings of two sites at Yunnan Observatory of Kunming and Gaomeigu Station of Lijiang are studied by using the three sub-aperture DIMM of Yunnan Observatory. The FWHMs given by 1 m telescope and the seeing measured by DIMMs are compared. In terms of the simultaneous data of seven days' observations, the average FWHMs of 1 m telescope is 1.17", while the average seeing of DIMM is 0.84". The authors tested the effect of time exposure on the measured seeing of three sub-aperture DIMM and found that the seeing of 20 ms time exposure is 15% better than that of 8 ms time exposure. From May 1995 to December 1996 the authors compared observations of two sites and obtained the data of 234 nights in Gaomeigu and of 256 nights in Yunnan observatory. The average seeings of two sites are, respectively, 0.70" at Gaomeigu and 0.95" at Yunnan Observatory. The seeing variations with time of the two sites are also studied.
Cen Xue-Fen
Joseph Wang C.-C.
Qian Tong-Ling
Qiu Robert C.
Wang Christina Yan
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