Performance and Early Results from the Earth Surface Mineral Dust Source Investigation (EMIT) Imaging Spectroscopy Mission

Robert O. Green, Natalie Mahowald, David R. Thompson, Charlene Ung, Phil Brodrick, Randy Pollock, Matthew Bennett, Sarah Lundeen, Michael Joyce, Winston Olson-Duvall, Bogdan Oaida, Christine Bradley, Ernesto Diaz, Roger Clark, Suresh Vannan, Gregg Swayze, Ray Kokaly, Paul Ginoux, Ron Miller, Gregory OkinCarlos Perez Garcia-Pando, Bethany Ehlmann, Olga Kalashnikova, Thomas H. Painter, Vincent Realmuto, Dana Chadwick, Eyal Ben-Dor, Daniela Heller Pearlshtien, Luis Guanter, Benjamin Phillips, Kevin Reath, Andrew Thorpe, Lucas Shaw, Abigail Keebler, Francisco Ochoa, Kathleen Grant, Amit Sen, Riley Duren, Vincenzo Obiso, Maria Goncalves-Ageitos, Yue Huang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Earth Surface Mineral Dust Source Investigation (EMIT) acquires new observations of the Earth from a state-of-the-art, optically fast F/1.8 visible to short wavelength infrared imaging spectrometer with high signal-to-noise ratio and excellent spectroscopic uniformity. EMIT was launched to the International Space Station from Cape Canaveral, Florida, on July 14, 2022 local time. The EMIT instrument is the latest in a series of more than 30 imaging spectrometers and testbeds developed at the Jet Propulsion Laboratory, beginning with the Airborne Imaging Spectrometer that first flew in 1982. EMIT's science objectives use the spectral signatures of minerals observed across the Earth's arid and semi-arid lands containing dust sources to update the soil composition of advanced Earth System Models (ESMs) to better understand and reduce uncertainties in mineral dust aerosol radiative forcing at the local, regional, and global scale, now and in the future. EMIT has begun to collect and deliver high-quality mineral composition determinations for the arid land regions of our planet. Over 1 billion high-quality mineral determinations are expected over the course of the one-year nominal science mission. Currently, detailed knowledge of the composition of the Earth's mineral dust source regions is uncertain and traced to less than 5,000 surface sample mineralogical analyses. The development of the EMIT imaging spectrometer instrumentation was completed successfully, despite the severe impacts of the COVID-19 pandemic. The EMIT Science Data System is complete and running with the full set of algorithms required. These tested algorithms are open source and will be made available to the broader community. These include calibration to measured radiance, atmospheric correction to surface reflectance, mineral composition determination, aggregation to ESM resolution, and ESM runs to address the science objectives. In this paper, the instrument characteristics, ground calibration, in-orbit performance, and early science results are reported.

Original languageEnglish
Title of host publication2023 IEEE Aerospace Conference, AERO 2023
PublisherIEEE Computer Society
ISBN (Electronic)9781665490320
DOIs
StatePublished - 2023
Event2023 IEEE Aerospace Conference, AERO 2023 - Big Sky, United States
Duration: 4 Mar 202311 Mar 2023

Publication series

NameIEEE Aerospace Conference Proceedings
Volume2023-March
ISSN (Print)1095-323X

Conference

Conference2023 IEEE Aerospace Conference, AERO 2023
Country/TerritoryUnited States
CityBig Sky
Period4/03/2311/03/23

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