The Emirates Mars Infrared Spectrometer (EMIRS) is one of three scientific instruments abroad the Emirates Mars Mission (EMM) spacecraft named "Hope". EMM will launch in 2020 and is designed to explore the diurnal and seasonal dynamics of the martian atmosphere on a global scale. EMM has three scientific instruments that provide an improved understanding of climate and weather in the martian lower and middle atmosphere as well as the thermosphere and exosphere. The Emirates eXploration Imager (EXI) and EMIRS instruments will focus on the lower atmosphere constituents, constraining dust and water ice optical depths, while determining the ozone and water vapor column abundances and the thermal structure up to 50 km altitude. The Emirates Mars Ultraviolet Spectrometer (EMUS) will make complementary observations, enabling important links between the lower atmospheric dynamics and the thermosphere and exosphere of the planet. The EMIRS instrument is an interferometric thermal infrared spectrometer developed by Arizona State University (ASU) and Mohammed Bin Rashid Space Centre (MBRSC). It builds on a long heritage of thermal infrared spectrometers designed, built, and managed by ASU's Mars Space Flight Facility, including the Thermal Emission Spectrometer (TES), Miniature Thermal Emission Spectrometer (Mini-TES), and the OSIRIS-REx Thermal Emission Spectrometer (OTES). EMIRS collects spectral data from 6-40+ μm at 5 cm-1 spectral sampling, which is enabled by a diamond beamsplitter and digital servo interferometer control electronics. EMIRS has a 3_3 array of pyroelectric DLaTGS detectors and a scan mirror that enable it make high-precision infrared radiance measurements over a martian hemisphere in 1/2 an hour of observing. The EMIRS instrument performance, spectral coverage, and spatial sampling are optimized to capture the integrated, lower and middle atmospheric dynamics, collecting 60 observations per week ( 20 images per orbit) at a resolution of 100-300 km/pixel. EMIRS contributes heavily to the scientific objectives of EMM and will provide a new view of the martian lower and middle atmosphere, capturing the sub-seasonal and diurnal evolution of key atmospheric constituents over the entire globe during the EMM two year primary mission.
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018