Abstract
The ExoMars 2020 MOMA (Mars Organic Molecule Analyzer) Gas Chromatograph Mass Spectrometer instrument is a key component of the Pasteur life detection payload on the ExoMars 2020 rover mission. As such it is subject to Planetary Protection requirements which include being sufficiently contamination controlled to preclude false positive or false negative results due to contamination. Detailed evaluation of the interaction instrument background and the other performance attributes of the Gas Chromatograph Mass Spectrometer during testing under Mars like conditions of temperature and pressure was carried out. This was the first test of the fully integrated test of the Gas Chromatograph Mass Spectrometer. The data from the testing was evaluated in four different modes of data analysis commonly used for processing gas chromatograph mass spectrometer data. This analysis showed that the instrument was capable of meeting its detection limit requirements. The analysis of the data also showed that the probability of false positives and false negatives within the specified instrument performance capabilities was minimal as evaluated at this time.
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