PT Journal AU Betz, AL Johnson, MA McLaren, RA Sutton, EC TI Heterodyne detection of CO[sub:2] emission lines and wind velocities in the atmosphere of Venus SO Astrophys. J. PY 1976 BP L141-L144 VL 208 DE carbon dioxide; emission spectra; optical heterodyning; planetary radiation; venus atmosphere; wind velocity; doppler effect; infrared radiation; ultraviolet radiation; venus clouds ER