Over the 1992/93 summer the Fabry-Perot spectrometer at Mawson, Antarctica (67.6¿S, 62.9¿E), was modified to permit observations of two lines in the OH (6--2) band near &lgr; 840 nm. Preliminary observations were obtained on 5 nights in early February. Analysis of these lines, permitting estimates of mesospheric winds and temperatures, will be presented. Lambda-doubling of OH (6--2) Q1(2) and P1(3) lines was measured to be 5.50¿0.01 pm and 19.17¿0.06 pm respectively. The results show that mesospheric temperatures can be obtained from Q1(2) profiles even though the doublet is not fully resolved. This emission is significantly more intense than the P1(3) emission so its use will allow better resolution of temporal variations. ¿ American Geophysical Union 1994