This paper presents a novel, ultra-compact hyperspectral imaging camera designed for a 3U CubeSat, leveraging the Offner optical scheme. The camera captures hyperspectral images with a spatial resolution of 200 meters and a spectral resolution of 12 nanometers across a 400 to 1000 nanometer wavelength range, covering 150 channels in the visible and near-infrared spectrums. The hyperspectrometer is specifically designed for the 3U CubeSat platform, featuring a robust all-metal cylindrical body and a coaxial arrangement of optical elements for optimal compactness and vibration stability. Numerical simulations were conducted to evaluate the performance of the imaging hyperspectrometer before construction. The 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 strong agreement at critical points, confirming the 3U CubeSat’s suitability for hyperspectral imaging in the visible and near-infrared spectrums. The ISOI 3U CubeSat can generate unique index images beyond the reach of Sentinel-2 L2A, underscoring its potential for advancing remote sensing applications.This paper presents a novel, ultra-compact hyperspectral imaging camera designed for a 3U CubeSat, leveraging the Offner optical scheme. The camera captures hyperspectral images with a spatial resolution of 200 meters and a spectral resolution of 12 nanometers across a 400 to 1000 nanometer wavelength range, covering 150 channels in the visible and near-infrared spectrums. The hyperspectrometer is specifically designed for the 3U CubeSat platform, featuring a robust all-metal cylindrical body and a coaxial arrangement of optical elements for optimal compactness and vibration stability. Numerical simulations were conducted to evaluate the performance of the imaging hyperspectrometer before construction. The 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 strong agreement at critical points, confirming the 3U CubeSat’s suitability for hyperspectral imaging in the visible and near-infrared spectrums. The ISOI 3U CubeSat can generate unique index images beyond the reach of Sentinel-2 L2A, underscoring its potential for advancing remote sensing applications.