“高分五号”卫星大气主要温室气体监测仪(特邀)

“高分五号”卫星于2018年5月9日成功发射, 是我国第一颗高光谱观测卫星, 大气主要温室气体监测仪是其中一台有效载荷, 采用空间外差光谱技术进行高光谱分光, 是国际上首台基于该体制的星载温室气体遥感设备。阐述了载荷的基本工作原理, 包括分光原理、工作模式及通道设置等内容。载荷的光学系统主要由五部分组成, 核心单元为一体化胶合干涉仪, 为避免光谱混叠对窄带滤光片的指标参数要求较高。为提高在轨数据定量化水平, 载荷设计了基于漫反射板系统的定标装置, 可满足光谱及辐射定标要求。最后, 梳理了载荷数据处理的基本流程, 并对首批观测数据进行了光谱复原, 成功获取了1级数据产品, 为下一步温室气体反演应用奠定了基础。

Abstract

GF-5 satellite was successfully launched on May 9, 2018. It is the first hyperspectral observation satellite in China. The Greenhouse gas Monitoring Instrument is one of the payloads. It is the first satellite-borne greenhouse gas remote sensing equipment in the world to use spatial heterodyne spectroscopy technology for hyperspectral spectroscopy. The basic working principle of the payload was described, including the principle of light splitting, working mode and band setting. The optical system of the payload consisted of five parts. The core unit was a bonded interferometer. In order to avoid spectral aliasing, the parameters of narrowband filters were required to be high. In order to improve the on-orbit data quantification level, a calibration device based on diffuse reflector system was designed, which can meet the requirements of spectral and radiation calibration. Finally, the basic process of payload data processing was sorted out, and the first batch of observed data was restored by spectrum. The first-level data products are successfully obtained, which lays a foundation for the next application of greenhouse gas inversion.

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熊伟. “高分五号”卫星大气主要温室气体监测仪(特邀)[J]. 红外与激光工程, 2019, 48(3): 0303002. Xiong Wei. Greenhouse gases Monitoring Instrument(GMI) on GF-5 satellite (invited)[J]. Infrared and Laser Engineering, 2019, 48(3): 0303002.

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