Fan Xinghao, Liu Chunyu, Liu Shuai, Xie Yunqiang, Zheng Liangliang, Wang Tiancong, Feng Qinping
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel). 2021 Mar 24;21(7):2276. doi: 10.3390/s21072276.
The design of compact hyperspectral cameras with high ground resolution and large field of view (FOV) is a challenging problem in the field of remote sensing. In this paper, the time-delayed integration (TDI) of the digital domain is applied to solve the issue of insufficient light energy brought by high spatial resolution, and a hyperspectral camera with linear variable filters suitable for digital domain TDI technology is further designed. The camera has a wavelength range of 450-950 nm, with an average spectral resolution of 10.2 nm. The paper also analyzed the effects of digital domain TDI on the signal-noise ratio (SNR) and the spectral resolution. During its working in orbits, we have obtained high-SNR images with a swath width of 150 km, and a ground sample distance (GSD) of 10 m @ 500 km. The design of the hyperspectral camera has an improved spatial resolution while reducing the cost.
设计具有高地面分辨率和大视场（FOV）的紧凑型高光谱相机是遥感领域中一个具有挑战性的问题。本文应用数字域的时间延迟积分（TDI）来解决高空间分辨率带来的光能不足问题，并进一步设计了一种适用于数字域TDI技术的线性可变滤光片高光谱相机。该相机的波长范围为450 - 950 nm，平均光谱分辨率为10.2 nm。本文还分析了数字域TDI对信噪比（SNR）和光谱分辨率的影响。在轨道运行期间，我们获得了信噪比高的图像，其扫描宽度为150 km，在500 km高度处地面采样距离（GSD）为10 m。该高光谱相机的设计在降低成本的同时提高了空间分辨率。
