Measurements of the Centimeter-Wave Properties of H2O under Simulated Conditions for Deep Jovian Atmospheres

Details Measurements of the Centimeter-Wave Properties of H2O under Simulated Conditions for Deep Jovian Atmospheres Measurements of the Centimeter-Wave Properties of H2O under Simulated Conditions for Deep Jovian Atmospheres

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.1407k&link_type=abstract

American Astronomical Society, DPS meeting #41, #14.07

Astronomy and Astrophysics

Astronomy

Scientific paper

Over to 1800 laboratory measurements of the microwave opacity and refractivity of H2O in a H2/He atmosphere have been conducted in the 5-20 cm wavelength range (1.5-6 GHz) at pressures from 12 mBars to 100 Bars and at temperatures from 333 to 525 K. The mole fraction of H2O ranged from 0.01% to 20% with some additional measurements of pure H2O . The high accuracy of these results have enabled development of a new model for the opacity of H2O in a H2/He atmosphere under Jovian conditions. The model employs empirically-fitted line parameters for H2, He, and self-broadening. The new model for H2O opacity will provide reliable results for pressures up to 100 Bars and at frequencies up to 6 GHz. These results directly impact the retrieval of Jovian atmospheric constituent abundances from microwave emission measurements conducted with earth-based radio telescopes and with the future NASA Juno mission.
This work was supported by NASA Contract NNM06AA75C from the Marshall Space Flight Center supporting the Juno Mission Science Team, under Subcontract 699054X from the Southwest Research Institute.

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