The Emirates Mars Mission (EMM) – Hope Probe – was developed to understand Mars atmospheric circulation, dynamics, and processes through characterization of the Mars atmosphere layers and its interconnections enabled by a unique high-altitude (19,970 km periapse and 42,650 km apoapse) low inclination orbit that will offer an unprecedented local and seasonal time coverage over most of the planet. EMM has three scientific objectives to (A) characterize the state of the Martian lower atmosphere on global scales and its geographic, diurnal and seasonal variability, (B) correlate rates of thermal and photochemical atmospheric escape with conditions in the collisional Martian atmosphere, and (C) characterize the spatial structure and variability of key constituents in the Martian exosphere. The EMM data products include a variety of spectral and imaging data from three scientific instruments measuring Mars at visible, ultraviolet, and infrared wavelengths and contemporaneously and globally sampled on both diurnal and seasonal timescale. Here, we describe our strategies for addressing each objective with these data in addition to the complementary science data, tools, and physical models that will facilitate our understanding. The results will also fill a unique role by providing diagnostics of the physical processes driving atmospheric structure and dynamics, the connections between the lower and upper atmospheres, and the influences of these on atmospheric escape.
<p>Martian mesospheric clouds are observed in the Martian atmosphere around 50 to 100 km. H<sub>2</sub>O and CO<sub>2</sub> clouds are known to form in the mesosphere. We present a systematic study of mesospheric clouds cataloged from images at a wavelength of ~180 nm acquired by the Emirates Ultraviolet Spectrometer (EMUS) instrument onboard the Emirates Mars Mission (EMM) Hope spacecraft. The study is focused on data from the mission's early Science Phase, when clouds are known to be abundant in aphelion season, and it provides insight into the distribution and pattern of mesospheric clouds, as well as showcasing corresponding near-simultaneous images of mesospheric clouds apparent in EMM&#8217;s Emirates eXploration Imager (EXI) images at a longer UV wavelength. This work is expected to provide valuable information on understanding the coupling between the lower and upper atmosphere.</p> <p>&#160;</p> <p>&#160;</p>
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