Development of visible and short-wave infrared hyperspectral imager onboard GF-5 satellite. Journal of Remote Sensing(Chinese),24(4):333-344 [DOI: 10.11834/jrs.20209196] 400-2500 nm, with spectral resolutions of higher than 5 nm in the VNIR and 10 nm in the SWIR, respectively. The swath width is 60 km, and the spatial resolution is 30 m. Compared with Hyperion, which is a classical hyperspectral instrument, the imaging width of the AHSI is superior (eight times), the number of spectral bands has increased by hundreds, and the Signal-to-Noise Ratio (SNR) has improved by four times. Compared with the instruments recently developed/planned by Germany, Italy, Indian, and Japan, the AHSI has competitive performance and has evident advantages in terms of swath width and number of spectral channels. The AHSI has achieved the widest swath width and broadest spectral range to shorten the revisit time, improve the observation and monitoring efficiency, and refine the Earth' s observation.As one of the six main payloads on GF-5 satellite, the AHSI demonstrates the development of spaceborne hyperspectral imaging technology in China. It features a large FOV telescope, a low-distortion large flat-field fine spectrometer, a large-size infrared focal plane detector, a long-life large cooling capacity cryocooler, a high-precision calibration system, and a high-precision image compensation mechanism. The AHSI has outstanding capability of detecting and identifying ground objects, making it suitable to precision applications, such as ecological environment monitoring, land and resource survey, and oil/gas exploration.
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