Optical design of the Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer

Christine L. Bradley; Erik Thingvold; Lori B. Moore; Justin M. Haag; Nasrat A. Raouf; Pantazis Mouroulis; Robert O. Green

doi:10.1117/12.2568019

22 August 2020 Optical design of the Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer

Christine L. Bradley, Erik Thingvold, Lori B. Moore, Justin M. Haag, Nasrat A. Raouf, Pantazis Mouroulis, Robert O. Green

Author Affiliations +

Proceedings Volume 11504, Imaging Spectrometry XXIV: Applications, Sensors, and Processing; 1150402 (2020) https://doi.org/10.1117/12.2568019
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

The Earth Surface Mineral Dust Source Investigation (EMIT) instrument is a high fidelity imaging spectrometer developed to characterize surface mineralogy of the Earth's dust source regions over the spectral range of 380- 2500 nm and spectral sampling of 7.4 nm. EMIT will close the current knowledge gap in dust source mineral composition by collecting over 1 billion high signal-to-noise ratio spectra in this region of our planet. These new measurements will be used in conjunction with state-of-the-art Earth System Models to understand and reduce the uncertainty in the radiative forcing effect of mineral dust aerosols. EMIT will be deployed on the International Space Station that has an orbit that is well suited for measuring the arid land regions of the Earth. The optical design utilizes a Dyson spectrometer to reduce volume and mass for a fast (F/1.8) and wide swath (1240 samples) optical system. An overview of the EMIT optical design, development, and current status are discussed.

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Christine L. Bradley, Erik Thingvold, Lori B. Moore, Justin M. Haag, Nasrat A. Raouf, Pantazis Mouroulis, and Robert O. Green "Optical design of the Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer", Proc. SPIE 11504, Imaging Spectrometry XXIV: Applications, Sensors, and Processing, 1150402 (22 August 2020); https://doi.org/10.1117/12.2568019

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