The Emirates Mars Mission (EMM) Emirates Mars InfraRed Spectrometer (EMIRS) Instrument.

Autor: Edwards CS; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Christensen PR; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Mehall GL; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Anwar S; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Tunaiji EA; Mohammed bin Rashid Space Center, Emirates Institute for Advanced Science and Technology, Al Khawaneej Area, Dubai, UAE., Badri K; Mohammed bin Rashid Space Center, Emirates Institute for Advanced Science and Technology, Al Khawaneej Area, Dubai, UAE., Bowles H; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Chase S; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Farkas Z; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Fisher T; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Janiczek J; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Kubik I; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Harris-Laurila K; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Holmes A; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Lazbin I; Arizona Space Technologies, Tempe, AZ USA., Madril E; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., McAdam M; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Miner M; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., O'Donnell W; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Ortiz C; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Pelham D; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Patel M; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Powell K; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Shamordola K; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Tourville T; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Smith MD; Goddard Space Flight Center, Greenbelt, MD USA., Smith N; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Woodward R; School of Earth and Space Exploration, Arizona State University, Tempe, AZ USA., Weintraub A; Department of Physics and Astronomy, Northern Arizona University, NAU BOX 6010, Flagstaff, AZ 86011 USA., Reed H; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO USA., Pilinski EB; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO USA.
Jazyk: angličtina
Zdroj: Space science reviews [Space Sci Rev] 2021; Vol. 217 (7), pp. 77. Date of Electronic Publication: 2021 Sep 22.
DOI: 10.1007/s11214-021-00848-1
Abstrakt: The Emirates Mars Mission Emirates Mars Infrared Spectrometer (EMIRS) will provide remote measurements of the martian surface and lower atmosphere in order to better characterize the geographic and diurnal variability of key constituents (water ice, water vapor, and dust) along with temperature profiles on sub-seasonal timescales. EMIRS is a FTIR spectrometer covering the range from 6.0-100+ μm (1666-100 cm -1 ) with a spectral sampling as high as 5 cm -1 and a 5.4-mrad IFOV and a 32.5×32.5 mrad FOV. The EMIRS optical path includes a flat 45° pointing mirror to enable one degree of freedom and has a +/- 60° clear aperture around the nadir position which is fed to a 17.78-cm diameter Cassegrain telescope. The collected light is then fed to a flat-plate based Michelson moving mirror mounted on a dual linear voice-coil motor assembly. An array of deuterated L-alanine doped triglycine sulfate (DLaTGS) pyroelectric detectors are used to sample the interferogram every 2 or 4 seconds (depending on the spectral sampling selected). A single 0.846 μm laser diode is used in a metrology interferometer to provide interferometer positional control, sampled at 40 kHz (controlled at 5 kHz) and infrared signal sampled at 625 Hz. The EMIRS beamsplitter is a 60-mm diameter, 1-mm thick 1-arcsecond wedged chemical vapor deposited diamond with an antireflection microstructure to minimize first surface reflection. EMIRS relies on an instrumented internal v-groove blackbody target for a full-aperture radiometric calibration. The radiometric precision of a single spectrum (in 5 cm -1 mode) is <3.0×10 -8 W cm -2  sr -1 /cm -1 between 300 and 1350 cm -1 over instrument operational temperatures (<∼0.5 K NE Δ T @ 250 K). The absolute integrated radiance error is < 2% for scene temperatures ranging from 200-340 K. The overall EMIRS envelope size is 52.9×37.5×34.6 cm and the mass is 14.72 kg including the interface adapter plate. The average operational power consumption is 22.2 W, and the standby power consumption is 18.6 W with a 5.7 W thermostatically limited, always-on operational heater. EMIRS was developed by Arizona State University and Northern Arizona University in collaboration with the Mohammed bin Rashid Space Centre with Arizona Space Technologies developing the electronics. EMIRS was integrated, tested and radiometrically calibrated at Arizona State University, Tempe, AZ.
Competing Interests: Compliance with Ethical StandardsThere are no conflicts of interest identified by the lead author or any co-author in the production of this research product. The research presented here did not involve human participants or animals.
(© The Author(s) 2021.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje