Institution(s): 1. Jet Propulsion Laboratory, California Institute of Technology
The MIRO (Microwave Instrument on the Rosetta Orbiter) is a dual frequency (560 GHz and 190 GHz) heterodyne instrument consisting of two broadband channels for continuum measurements, and a high spectral resolution (44 kHz) spectrometer interfaced with the submillimeter radiometer. The spectroscopic receiver is fixed tuned to measure molecular transitions of water, carbon monoxide, ammonia, and methanol. The continuum channels measure the nucleus sub-surface temperatures; the spectrometer channels are sensitive to gas abundance, velocity, and temperature. Broad scientific objectives are to understand heat transport and ice sublimation in comets as interrelated processes reflecting properties acquired at time of formation and subsequent evolution and to understand important processes in the coma. This paper will present an overview of the MIRO data obtained from early June 2014 through March 2015, and discuss status of the data analysis to date.
A part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. We thank the Rosetta operational support teams from the ESA.