To address the increasing demand for diurnal information on trace gases and aerosols, a series of geostationary (GEO) satellite programs called GEO-constellation have been initiated, with the launch of the Geostationary Environment Monitoring Spectrometer (GEMS) onboard Geostationary Korea Multi-Purpose Satellite 2B (GK2B). To assess the sensor performance of GEMS in orbit, the current work suggests employing an inter-calibration methodology involving the Advanced Meteorological Imager (AMI) aboard its twin satellite, GK2A. Twin satellites have a significant advantage in obtaining collocation data sets across diverse spatiotemporal, angular, and atmospheric conditions, enabling rigorous collocation criteria effectively reducing mismatch uncertainty. The results present robust correlation coefficients over 0.99, revealing the current calibration characteristics of the sensors. This research emphasizes the advantages of the GEO-GEO inter-calibration, particularly the capability of analyzing spatial and temporal dependencies. These findings confirm the mutual benefit of utilizing the sensors in similar configurations, highlighting their importance for future satellite monitoring endeavors.

中文翻译：

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双星同步卫星传感器互标定的优势


为了满足对痕量气体和气溶胶每日信息日益增长的需求，一系列称为 GEO 星座的对地静止 (GEO) 卫星计划已经启动，韩国对地静止多用途卫星搭载了对地静止环境监测光谱仪 (GEMS) 2B（GK2B）。为了评估 GEMS 在轨道上的传感器性能，当前的工作建议采用一种相互校准方法，涉及其双卫星 GK2A 上的高级气象成像仪 (AMI)。双卫星在获取不同时空、角度和大气条件下的搭配数据集方面具有显着优势，可以实现严格的搭配标准，有效减少失配的不确定性。结果呈现出超过 0.99 的稳健相关系数，揭示了传感器的当前校准特性。这项研究强调了GEO-GEO相互校准的优势，特别是分析空间和时间依赖性的能力。这些发现证实了在类似配置中使用传感器的互惠互利，突出了它们对未来卫星监测工作的重要性。