On-orbit calibration and performance of the EMIT imaging spectrometer

被引：15

作者：

Thompson, David R. ^{[1
]}

Green, Robert O. ^{[1
]}

Bradley, Christine ^{[1
]}

Brodrick, Philip G. ^{[1
]}

Mahowald, Natalie ^{[15
]}

Ben Dor, Eyal ^{[2
]}

Bennett, Matthew ^{[1
]}

Bernas, Michael ^{[1
]}

Carmon, Nimrod ^{[1
]}

Chadwick, K. Dana ^{[1
]}

Clark, Roger N. ^{[3
]}

Coleman, Red Willow ^{[1
]}

Cox, Evan ^{[11
]}

Diaz, Ernesto ^{[1
]}

Eastwood, Michael L. ^{[1
]}

Eckert, Regina ^{[1
]}

Ehlmann, Bethany L. ^{[4
]}

Ginoux, Paul ^{[5
]}

Ageitos, Maria Gonsalves ^{[6
,10
]}

Grant, Kathleen ^{[8
]}

Guanter, Luis ^{[9
]}

Pearlshtien, Daniela Heller ^{[2
]}

Helmlinger, Mark ^{[1
]}

Herzog, Harrison ^{[1
]}

Hoefen, Todd ^{[11
]}

Huang, Yue ^{[12
,13
]}

Keebler, Abigail ^{[4
]}

Kalashnikova, Olga ^{[1
]}

Keymeulen, Didier ^{[1
]}

Kokaly, Raymond ^{[11
]}

Klose, Martina ^{[12
]}

Li, Longlei ^{[14
]}

Lundeen, Sarah R. ^{[1
]}

Meyer, John

Middleton, Elizabeth ^{[16
]}

Miller, Ron L.

Mouroulis, Pantazis ^{[1
]}

Oaida, Bogdan ^{[1
]}

Obiso, Vincenzo ^{[13
]}

Ochoa, Francisco ^{[17
]}

Olson-Duvall, Winston ^{[1
]}

Okin, Gregory S. ^{[17
]}

Painter, Thomas H. ^{[17
,18
]}

Garcia-Pando, Carlos Perez ^{[6
,7
]}

Pollock, Randy ^{[19
]}

Realmuto, Vincent ^{[1
]}

Shaw, Lucas ^{[1
]}

Sullivan, Peter ^{[1
]}

Swayze, Gregg ^{[11
]}

Thingvold, Erik ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA

[2] Tel Aviv Univ, Tel Aviv, Israel

[3] Planetary Sci Inst, Tucson, AZ USA

[4] CALTECH, Pasadena, CA USA

[5] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA

[6] Barcelona Supercomp Ctr, Barcelona, Spain

[7] ICREA, Catalan Inst Res & Adv Studies, Barcelona, Spain

[8] Univ Southern Calif, Los Angeles, CA USA

[9] Univ Politecn Valencia, Valencia, Spain

[10] Univ Politecn Cataluna, Barcelona, Spain

[11] United States Geol Survey, Denver, CO USA

[12] Karlsruhe Inst Technol, Karlsruhe, Germany

[13] NASA, Goddard Inst Space Studies, New York, NY USA

[14] Columbia Univ, New York, NY USA

[15] Cornell Univ, Ithaca, NY USA

[16] NASA, Goddard Space Flight Ctr, New York, MD USA

[17] Univ Calif Los Angeles, Los Angeles, CA USA

[18] Airborne Snow Observ Inc, Mammoth Lakes, CA USA

[19] Victoria Univ Wellington, Wellington, New Zealand

来源：

REMOTE SENSING OF ENVIRONMENT | 2024年 / 303卷

基金：

欧洲研究理事会; 美国国家航空航天局;

关键词：

Imaging spectroscopy; Hyperspectral imagery; Mineral dust cycle; Radiative forcing; EMIT; NASA; International space station; Remote sensing; Mineralogy; Calibration; Validation; Atmospheric correction; Visible-shortwave infrared spectroscopy; ATMOSPHERIC CORRECTION; SPECTROSCOPY MISSION; SENSORS;

D O I：

10.1016/j.rse.2023.113986

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The Earth surface Mineral dust source InvesTigation (EMIT) is a remote visible to shortwave infrared (VSWIR) imaging spectrometer that has been operating onboard the International Space Station since July 2022. This article describes EMIT's on-orbit spectroradiometric calibration and validation. Accurate spectroscopy is vital to achieve consistent mapping results with orbital imaging spectrometers. EMIT takes a unique approach to this challenge, with just six optical elements, no shutter, and no onboard calibration systems. Its simple design focuses on uniformity and stability to enable vicarious spectroradiometric calibration. Our experiments demonstrate that this approach is successful, approaching the fidelity of manual field spectroscopy in some cases, and enabling new and more accurate products across diverse Earth science disciplines. EMIT achieves several notable firsts for an instrument of its class. It demonstrates successful on-orbit adjustments of Focal Plane Array (FPA) alignment with sub -micron precision. It offers spectral uniformity better than 98%. Optical artifacts in the measurement channels are at least three orders of magnitude below the primary solar -reflected surface signals. Its noise performance enables percent -level discrimination in the depths of mineral absorption features. In these aspects, EMIT satisfies the stringent performance needs for the next generation of VSWIR imaging spectrometers to observe the Earth's ecosystems, geology, and water resources.

引用

页数：16

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