Mars Atmospheric Wind Interferometer (MAWI)

Computer Science – Sound

Scientific paper

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6225 Mars, 6297 Instruments And Techniques

Scientific paper

The Mars climate system is dynamic and characterized by the seasonal cycles of dust, water, and CO2, which are coupled through global atmospheric circulation patterns. This paper describes the design of a spaceborne wind instrument, the Mars Atmospheric Wind Interferometer (MAWI) to provide systematic, global wind measurements needed for our understanding of how global-scale wind systems control these cycles. MAWI is a double-etalon Fabry-Perot Interferometer (FPI) that uses the mature limb Doppler wind sounding technique successfully implemented for FPI/Dynamic Explorer, High Resolution Doppler Imager (HRDI)/UARS, and TIMED Doppler Imager (TIDI)/TIMED. Doppler Winds are determined from emission lines in the O_2(^1Δ) 1.27~μm airglow band system. It also adds a newly developed sub-limb technique for wind measurements under dusty (optically thick) conditions from the absorption lines in the CO2 1.4~μm region. In this paper, we present the MAWI remote sensing concept, its modes of operations, and the conceptual design of the MAWI instrument. The expected wind measurement accuracies will also be discussed

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