NSSDCA ID: 2020-047A-01
Mission Name: Emirates Mars Mission (Hope)The Emirates eXploration Imager (EXI) is a high-resolution multiband (visible and ultraviolet) camera mounted on the instrument panel on the Mars-facing side of the Hope spacecraft bus. The primary science objectives are to stimate the column integrated optical depth of dust, water-ice clouds, and ozone, and return color images of the martian surface. EXI is a 12.6 megapixel CMOS (Complementary Metal Oxide Semiconductor) imager with a filter wheel holding six filters, three UV and three visible. The 12.6 Mpixel focal plane has an aspect ratio of 4:3, 4096 x 3072 pixels, at 5.5 microns/pixel. The system has a 12-bit dynamic range.
The UV and visible imaging use two separate lens systems and channels. The UV system has a 48 mm, f/3.6 lens with a field-of-view of 19.0 x 19.0 degrees and a pixel resolution of 23 arcsec. Approximate surface resolution is 2.3 km/pixel at periapse and 4.9 km/pixel at apoapse. The three UV filter bands are (full-width half-maximum wavelength range - FWHM) UV1 (205-235 nm), UV2 (245 - 275 nm), and UV3 (305 - 335 nm).
The visible system has a 51 mm f/4.25 lens with a field-of-view of 25.8 x 19.2 degrees, a pixel resolution of 22 arcsec. Approximate surface resolution is 2.2 km per pixel at periapsis and 4.6 km/pixel at apoapsis. The three visible filter bands are (FWHM) Blue (427 - 447 nm), Green (536 - 556 nm), and Red (625 - 645 nm).
Questions and comments about this experiment can be directed to: Dr. David R. Williams
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