15min:

JOHN C. PEARSON, SHANSHAN YU, HARSHAL GUPTA AND BRIAN J. DROUIN, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109.

The recent detection of HD¹⁸O in Orion KL by the Herschel Space Observatory provided a strong motivation to revisit the rotational spectrum in order to obtain more accurate calculations of transition frequencies. Rotational ransitions were recorded in the 300-2700~GHz frequency range. Analysis of the combined microwave and infrared data sets with an Euler series Hamiltonian has facilitated determination of a set of precise rotational constants to support precision velocity measurements. The new rotational data also provides a means of evaluating the performance of the MARVEL algorithm used in the recent review of all available HDO data.