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9 February 2001 Imaging spectrometer VIRS in remote sensing experiments for simulation of the Skymed/Cosmo system
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12 SkyMed/Cosmo is a research project, supported by the Italian Space Agency, devoted to develop a satellite constellation for the monitoring of the Earth surface in the optical and microwave spectral ranges. The system is devised for such operational purposes as disaster monitoring and observation of marine and terrestrial ecosystems over regional scale, and will be characterized by a very short re-visitation time. Nowadays the SkyMed/Cosmo project is expected to equip some satellites with different optical sensors comprising also a hyperspectral push-broom imager, having not less than roughly 40 spectral bands with a spectral resolution of 10 nm and radiometric resolution of 12 bit. This is a remarkable achievement that also requires a lot of theoretical and experimental work to be executed. An airborne hyperspectral instrument was selected for simulating the performance of this advanced push-broom satellite-based imager and our Institute was charged for carrying out some research and experiments. The selected airborne instrument is the VIRS-200, a push-broom hyperspectral sensor manufactured by the Officine Galileo and operating in the visible and near infrared spectral ranges (from 400 nm up to 1000 nm). This sensor measures a reflectance spectrum constituted of 20 spectral samples (tuneable channels) whose wavelength position can be user- selected with a step-increment of 2.5 nm. The bandwidth of each spectral channel is 2.5 nm and the spectral samples are digitized with a quantization accuracy of 10 bits.
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Alessandro Barducci, Ivan Pippi, and Marco Poggesi "Imaging spectrometer VIRS in remote sensing experiments for simulation of the Skymed/Cosmo system", Proc. SPIE 4169, Sensors, Systems, and Next-Generation Satellites IV, (9 February 2001);

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