The Geostationary Fourier Transform Spectrometer

Richard Key; Stanley Sander; Annmarie Eldering; Jean-Francois Blavier; Dmitriy Bekker; Kenneth Manatt; David Rider; Yen-Hung (James) Wu

doi:10.1117/12.930257

15 October 2012 The Geostationary Fourier Transform Spectrometer

Richard Key, Stanley Sander, Annmarie Eldering, Jean-Francois Blavier, Dmitriy Bekker, Kenneth Manatt, David Rider, Yen-Hung (James) Wu

Author Affiliations +

Proceedings Volume 8515, Imaging Spectrometry XVII; 851506 (2012) https://doi.org/10.1117/12.930257
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

The Geostationary Fourier Transform Spectrometer (GeoFTS) is an imaging spectrometer designed for a geostationary orbit (GEO) earth science mission to measure key atmospheric trace gases and process tracers related to climate change and human activity. GEO allows GeoFTS to continuously stare at a region of the earth for frequent sampling to capture the variability of biogenic fluxes and anthropogenic emissions from city to continental spatial scales and temporal scales from diurnal, synoptic, seasonal to interannual. The measurement strategy provides a process based understanding of the carbon cycle from contiguous maps of carbon dioxide (CO₂), methane (CH₄), carbon monoxide (CO), and chlorophyll fluorescence (CF) collected many times per day at high spatial resolution (~2.7km×2.7km at nadir). The CO₂/CH₄/CO/CF measurement suite in the near infrared spectral region provides the information needed to disentangle natural and anthropogenic contributions to atmospheric carbon concentrations and to minimize uncertainties in the flow of carbon between the atmosphere and surface. The half meter cube size GeoFTS instrument is based on a Michelson interferometer design that uses all high TRL components in a modular configuration to reduce complexity and cost. It is self-contained and as independent of the spacecraft as possible with simple spacecraft interfaces, making it ideal to be a “hosted” payload on a commercial communications satellite mission. The hosted payload approach for measuring the major carbon-containing gases in the atmosphere from the geostationary vantage point will affordably advance the scientific understating of carbon cycle processes and climate change.

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Richard Key, Stanley Sander, Annmarie Eldering, Jean-Francois Blavier, Dmitriy Bekker, Kenneth Manatt, David Rider, and Yen-Hung (James) Wu "The Geostationary Fourier Transform Spectrometer", Proc. SPIE 8515, Imaging Spectrometry XVII, 851506 (15 October 2012); https://doi.org/10.1117/12.930257

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