Development and application of the field imaging spectrometer system
地面成像光谱辐射测量系统及其应用

This paper describes the field imaging spectrometer system (FISS) based on a cooling area CCD, describing its imaging principle, structural design, main technology parameters, and data processing flow. Geometric rectification of the FISS was implemented using precise indoor markers and outdoor measured data. Spectral calibration of the FISS was conducted using self-programmed spectral calibration software which determined the center wavelength and the full width at half maximum of each band. An integrating sphere was used to achieve absolute radiometric calibration of the FISS with less than 5% calibration error for each band. In addition, a look-up table of radiometric calibration coefficients for various measured conditions was gen-erated and various laboratory and field tests were carried out. Crop-weed discrimination, offshore marine environment monitor-ing, milk discrimination, and estimation of vegetation biochemical information were studied using previously acquired data. The FISS provided successful results for all of the above examples, suggesting its potential application in other fields, including geo-logy, food science, agriculture, forestry, and urban research.