The Carbon Balance Observatory (CARBO) instrument for remote sensing of greenhouse gases from space

Shannon Kian Zareh; Charles E. Miller; Andre Wong; Peter Sullivan; Mayer Rud; Yuri Beregovski; Daniel W. Wilson; J. Kent Wallace; Glenn Sellar; Didier Keymeulen; Cynthia B. Brooks; Annmarie Eldering; Dejian Fu; Amy Mainzer

doi:10.1117/12.2539078

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15 October 2019 The Carbon Balance Observatory (CARBO) instrument for remote sensing of greenhouse gases from space

Shannon Kian Zareh, Charles E. Miller, Andre Wong, Peter Sullivan, Mayer Rud, Yuri Beregovski, Daniel W. Wilson, J. Kent Wallace, Glenn Sellar, Didier Keymeulen, Cynthia B. Brooks, Annmarie Eldering, Dejian Fu, Amy Mainzer

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Proceedings Volume 11152, Remote Sensing of Clouds and the Atmosphere XXIV; 111520Z (2019) https://doi.org/10.1117/12.2539078
Event: SPIE Remote Sensing, 2019, Strasbourg, France

Abstract

We present the current development of the Carbon Balance Observatory (CARBO). CARBO is a wide-swath mapping, low Earth orbit (LEO) new generation of instruments that expands on the ground-breaking CO₂ and Solar Induced Fluorescence (SIF) measurements pioneered by the Orbiting Carbon Observatory (OCO-2/3) by adding CH₄ and CO detection. The instrument’s spatial coverage is delivered at 2 km by 2 km resolution with a field-of-view of 10° to 15° from LEO for a ~200 km wide swath. It achieves roughly 20x better spatial coverage than the OCO-2 instrument, and 3x better Solar Induced Chlorophyll Fluorescence (SIF) detection sensitivity, in a smaller package. CARBO will measure CO₂ at <1.5 ppm, CH₄ at <7 ppb, CO at <5 ppb and SIF < 20%. The measurement of CO₂/CH4_/CO/SIF at these concentrations will significantly increase our ability to disentangle carbon fluxes into their constituent components. CARBO utilizes innovative immersion grating technology and enables high resolving power spectroscopy (roughly 20,000) in a smaller and lighter package that is more cost effective than current space-based CO₂ remote sensing instruments. CARBO modules cover 4 different spectral ranges (from 740 nm to 2.3μm), where two channels will be built and field tested. CARBO’s modular architecture reduces implementation risk, accelerates access to space, and extends opportunities to a more diverse set of platforms and launch vehicles. CARBO significantly improves our understanding of the global carbon cycle. Here we discuss an overview of the design elements and focus on the expected radiometric performance of channels 1 (~760 nm) and 2 (~1600 nm).

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Shannon Kian Zareh, Charles E. Miller, Andre Wong, Peter Sullivan, Mayer Rud, Yuri Beregovski, Daniel W. Wilson, J. Kent Wallace, Glenn Sellar, Didier Keymeulen, Cynthia B. Brooks, Annmarie Eldering, Dejian Fu, and Amy Mainzer "The Carbon Balance Observatory (CARBO) instrument for remote sensing of greenhouse gases from space", Proc. SPIE 11152, Remote Sensing of Clouds and the Atmosphere XXIV, 111520Z (15 October 2019); https://doi.org/10.1117/12.2539078

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