Analysis of data from the Pioneer Venus Sounder Probe mass spectrometer

Computer Science – Sound

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Mass Spectrometers, Pioneer Venus 2 Sounder Probe, Venus (Planet), Venus Atmosphere, Atmospheric Composition, Gas Analysis, Mass Spectra, Rare Gases

Scientific paper

The composition of the lower atmosphere of the planet Venus from 62 km to the surface was measured by a neutral gas mass spectrometer onboard of the Pioneer Venus Sounder Probe. Fifty-one mass spectra were obtained with an average altitude resolution of approximately 1 km. The instrument measured the composition of the gases relative to CO2, the dominant gas, that is sampled from the Venus atmosphere through a special leak. The mass range extended from 1 to 208 amu with a sensitivity of the order of 1 ppm relative to CO2, but for the noble gases it was nearly 100 times better. A description of the instrument and the initial results are reported.

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