Geostationary earth observation system concept by 3.6-meter synthetic aperture imaging
Geostationary earth observation system concept by 3.6-meter synthetic aperture imaging
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3.6米合成孔径成像对地静止地球观测系统概念
DOI：
10.1117/12.2599706
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
T. Kimura
中科院分区：
文献类型：
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作者：
T. Mizutani;Y. Shirasawa;Seichi Sato;Masuo Takahashi;T. Kimura
本文介绍了地球观测系统概念研究的结果。新系统代表了更大望远镜孔径的技术突破，这是提高空间分辨率所必需的。该系统可以提高时间分辨率，同时保持实际的空间分辨率。观察系统的设计是从观察请求到数据交付的延迟为30分钟。使命研究强调，该系统需要在发生自然灾害时立即评估情况，从而减少人类痛苦。由于所需的空间分辨率，光学系统需要有一个3.6米的光圈。研究并采用了一种分块主镜合成孔径光学传感器。分段反射镜光学系统在技术上最具挑战性，并使用全尺寸单段原型进行了研究，以评估可行性并识别技术风险。本文介绍了传感器和卫星系统的初步设计，并报告了技术演示和拟议的地球静止观测系统。
This paper presents the results of a conceptual study of an Earth observation system. The new system represents a technical breakthrough in larger telescope aperture, which is necessary to improve spatial resolution. The system makes it possible to improve temporal resolution while maintaining a practical spatial resolution. The observation system was designed to have a latency of 30 minutes from the observation request until data delivery. The mission study emphasized the system's need to immediately assess the situation when a natural disaster occurs and thus reduce human suffering. Due to the required spatial resolution, the optical system needed to have a 3.6 m aperture. A synthetic aperture optical sensor with a segmented primary mirror was investigated and adopted. The segmented-mirror optical system was the most technically challenging and was investigated using a full-scale one-segment prototype to evaluate the feasibility and identify technical risks. This paper presents the tentative design of the sensor and satellite system and reports on the technical demonstration and the proposed geostationary observation system.