The current status of GOSAT and the concept of GOSAT-2
The current status of GOSAT and the concept of GOSAT-2
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DOI：
10.1117/12.974954
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
M. Nakajima;A. Kuze;H. Suto
中科院分区：
文献类型：
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作者：
M. Nakajima;A. Kuze;H. Suto
GOSAT是专门用于监测CO2和CH 4柱浓度的卫星，在近3年半的时间里，在标定和验证的基础上，对数据处理算法进行了多次改进，提高了浓度数据的精度。这些数据使我们认识到从空间进行温室气体观测的可行性。它被要求扩大这一使命，使其对人类有用。因此，我们研究了下一代温室气体空间观测的要求，并确定了GOSAT-2的使命要求。本使命要求中定义的二氧化碳浓度测量精度目标分别为陆地和海洋上空500公里和2,000公里网格空间分辨率下的0.5 ppm，以及1个月平均值。为了实现这一目标，GOSAT-2将采用傅里叶变换光谱仪（FTS）和GOSAT沿着成像仪，但功能和性能将得到改进。如增加CO观测波段，采用CAI的紫外波段光栅光谱仪测量NO2，提高气溶胶反演效果等。在介绍GOSAT观测结果之后，将介绍GOSAT-2的概念。
GOSAT which is dedicated to monitor the column concentration of carbon dioxide and methane was launched almost 3 and half years ago, and the data processing algorithm have been improved a few times based on the calibration and validation, and the precision of the concentration data have been increased. These data gave us a realization of the availability of the GHG observation from space. And it has been required to expand this mission to make it useful for mankind. So we have investigated the requirements for the next generation greenhouse gases observations from space and have defined the mission requirements for GOSAT-2. The measurement accuracy target of Carbon Dioxide concentration defined in this mission requirement is 0.5 ppm at 500km and 2,000km mesh spatial resolution over the land and ocean, respectively and 1 month average. To achieve this target, GOSAT-2 will adopt the Fourier Transform Spectrometer (FTS) and the imager along with GOSAT, but the functions and performances will be improved. For example, the CO observation band will be added and the grating spectrometer for UV band of CAI will be adopted to measure NO2 and to improve the aerosol retrievals. Following the presentation of the GOSAT observation results, the concept of GOSAT-2 will be shown.