Calculation of lineshape parameters for self- broadening of water vapor transitions via complex Robert-Bonamy theory Bobby Antony, Steven Neshyba* & Robert Gamache Department of Environmental, Earth, and Atmospheric Sciences, Intercampus Graduate School of Marine Sciences and Technology, University of Massachusetts Lowell, MA *Department of Chemistry, University of Puget Sound, Tacoma, WA 98416 Introduction Studies on atmospheric water vapor by the NASA EOS mission AIRS on Aqua TES and HIRDLS on Aura Lack of sufficient data On spectral parameters like Half-width & Line Shift Only 440 out of half-width measurements have uncertainty