Ivliev Nikolay, Podlipnov Vladimir, Petrov Maxim, Tkachenko Ivan, Ivanushkin Maksim, Fomchenkov Sergey, Markushin Maksim, Skidanov Roman, Khanenko Yuriy, Nikonorov Artem, Kazanskiy Nikolay, Soifer Viktor
Image Processing Systems Institute NRC "Kurchatov Institute", Molodogvardeyskaya 151, 443001 Samara, Russia.
Samara National Research University Named after S.P. Korolev, Institute of IT and Cybernatics, Moskovskoye Shosse 34, 443086 Samara, Russia.
Sensors (Basel). 2024 Apr 30;24(9):2885. doi: 10.3390/s24092885.
This paper presents findings from a spaceborne Earth observation experiment utilizing a novel, ultra-compact hyperspectral imaging camera aboard a 3U CubeSat. Leveraging the Offner optical scheme, the camera's hyperspectrometer captures hyperspectral images of terrestrial regions with a 200 m spatial resolution and 12 nanometer spectral resolution across a 400 to 1000 nanometer wavelength range, covering 150 channels in the visible and near-infrared spectrums. The hyperspectrometer is specifically designed for deployment on a 3U CubeSat nanosatellite platform, featuring a robust all-metal cylindrical body of the hyperspectrometer, and a coaxial arrangement of the optical elements ensures optimal compactness and vibration stability. The performance of the imaging hyperspectrometer was rigorously evaluated through numerical simulations prior to construction. Analysis of hyperspectral data acquired over a year-long orbital operation demonstrates the 3U CubeSat's ability to produce various vegetation indices, including the normalized difference vegetation index (NDVI). A comparative study with the European Space Agency's Sentinel-2 L2A data shows a strong agreement at critical points, confirming the 3U CubeSat's suitability for hyperspectral imaging in the visible and near-infrared spectrums. Notably, the ISOI 3U CubeSat can generate unique index images beyond the reach of Sentinel-2 L2A, underscoring its potential for advancing remote sensing applications.
本文介绍了一项利用搭载在3U立方星上的新型超紧凑型高光谱成像相机进行的星载地球观测实验的结果。该相机的高光谱仪采用奥夫纳光学方案，在400至1000纳米波长范围内，以200米的空间分辨率和12纳米的光谱分辨率捕捉陆地区域的高光谱图像，覆盖可见光和近红外光谱中的150个通道。该高光谱仪专为部署在3U立方星纳米卫星平台而设计，其高光谱仪主体采用坚固的全金属圆柱体，光学元件同轴排列，确保了最佳的紧凑性和振动稳定性。在制造之前，通过数值模拟对成像高光谱仪的性能进行了严格评估。对长达一年的轨道运行期间获取的高光谱数据的分析表明，3U立方星能够生成各种植被指数，包括归一化差异植被指数（NDVI）。与欧洲航天局哨兵 - 2 L2A数据的对比研究表明，在关键点上两者高度一致，证实了3U立方星在可见光和近红外光谱中进行高光谱成像的适用性。值得注意的是，ISOI 3U立方星能够生成哨兵 - 2 L2A无法获取独特指数图像，凸显了其在推进遥感应用方面的潜力。
