2015/09/29 by Eddy Neefs, Ann Carine Vandaele, Rachel Drummond +46 · 3 citations
Physics and Astronomy · Earth and Planetary Sciences · Engineering · #Optical and Acousto-Optic Technologies #Atmospheric Ozone and Climate #Calibration and Measurement Techniques
paper · pdf · doi:10.1364/ao.54.008494
openalex publication_date 2015/09/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
NOMAD is a spectrometer suite on board ESA's ExoMars trace gas orbiter due for launch in January 2016. NOMAD consists of two infrared channels and one ultraviolet and visible channel allowing the instrument to perform observations quasi-constantly, by taking nadir measurements at dayside and nightside, and during solar occultations. In this paper, the design, manufacturing, and testing of the two infrared channels are described. We focus upon the optical working principle in these channels, where an echelle grating, used as a diffractive element, is combined with an acousto-optical tunable filter, used as a diffraction order sorter.