| dc.description.abstract | The hyperspectral imager is a useful optical instrument for remote sensing of Earth environments. The applications of the hyperspectral imager include land resource assessment, water pollution investigation, and survey on air pollution. The traditional hyperspectral imager consists of object lens system, the spectrometer system, and the imaging system. The detected light from the object lens system is dispersed by a spectrometer system (e.g., grating), and sequentially recorded as the hundreds of bandwidths of the visible/infrared emission by the imaging system. People use the characteristics of spectral to identify substances. Hyperspectral imaging has been applied for numerous applications, including agricultural and water resources control, medical diagnosis and military defense.
We design the engineering model of the CubeSat hyperspectral imaging system with a continuous emission band between 460-650 nm with high wavelength resolution (~5nm). The instrument features weight light, size small and cost low that uses a push-broom method to acquire hyperspectral images, FOV (field of view) is about 2.85 °. Its swath width is about 23.5 kilometers at the height of 500 kilometers. The centered wavelength of the spectral range is designed at the wavelength of 550nm, and its full width at half a maximum is ~5nm. We conducted the following experiments to confirm the performance of the instrument: assembling calibration, wavelength calibration, radiance calibration, test of spectral resolution and FOV measurement. After the experiment, we are confident that it meets the required specifications. We also scanned the outdoor view in a sideway using our hyperspectral imaging system. The recorded hyperspectral data cube is a three-dimensional data composed of two-dimensional
III
spatial and one-dimensional spectral data. In the future, we plan to develop the flight model for the sounding rocket and CubeSat missions. | en_US |