Abstract. The demonstration satellite GHGSat-D or “Claire”, launched on June 21, 2016, is the first in a planned constellation of small satellites designed and operated by GHGSat, Inc. to measure greenhouse gas emissions at the facility scale from space. Its instrument measures methane concentrations by collecting and spectrally decomposing solar backscattered radiation in the shortwave infrared using a compact fixed-cavity Fabry-Perot imaging spectrometer. The effective spatial resolution of 50 × 50 m² over targeted 12 × 12 km² scenes is unprecedented for a space-based gas sensing spectrometer. Here we report on the instrument design, forward model and retrieval procedure, and present several examples of retrieved methane emissions observed over industrial facilities. We discuss the sources of error limiting the performance of GHGSat-D and identify improvements for our follow-on satellites. Claire's mission has proven that small satellites can be used to identify and quantify methane emissions from industrial facilities, enabling operators to take prompt corrective action.

中文翻译：

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GHGSat-D成像光谱仪

摘要。GHGSat-D或“ Claire”示范卫星于2016年6月21日发射，是GHGSat，Inc.设计和运营的计划中的小卫星星座中的第一颗，用于测量设施规模的太空温室气体排放。它的仪器使用紧凑型固定腔Fabry-Perot成像光谱仪通过收集和光谱分解短波红外中的太阳反向散射辐射来测量甲烷浓度。的50×50微米的有效空间分辨率²超过目标12×12公里²空基气体传感光谱仪的场景是前所未有的。在这里，我们报告了仪器的设计，正向模型和取回程序，并提供了在工业设施上观察到的取回甲烷排放的几个示例。我们讨论了限制GHGSat-D性能的误差源，并确定了我们后续卫星的改进。克莱尔（Claire）的任务已证明，小型卫星可用于识别和量化工业设施中的甲烷排放，从而使操作员能够迅速采取纠正措施。