24 October 2013 Validation and simulation examples of an end-to-end simulator for optical imaging systems
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Abstract
A software tool for a simplified end-to-end simulation of data products from space-borne and airborne visible, nearinfrared and short-wave infrared imaging spectrometers, starting from either synthetic or airborne hyper-spectral data, has been developed and tested. Such a simulator is conceived as a preliminary aid tool (during phase 0⁄A) for the specification and early development of new Earth observation optical instruments, whose compliance to user’s requirements is achieved through a process of cost/performance trade-off. The proposed simulator is based on three principal core modules: the reflectance scenario simulator, the atmospheric simulator and the instrument simulator. High spatial/spectral resolution images with low intrinsic noise and the sensor/mission specifications are used as inputs. Examples of hyper-spectral and panchromatic images for existing and future instruments are reported, showing the capabilities for simulating target detection scenarios and image quality assessment. The Selex-ES simulator, as compared with other existing software, implements all modules necessary for a complete image simulation, allowing excellent flexibility and expandability for new integrated functions because of the adopted IDL-ENVI software environment. The simulation modeling has been validated and assessed through the matching between synthetized and true spectra acquired at ground and airborne level for clay soil mapping. A simulation of the same clay map at satellite scale has also demonstrated a more than acceptable agreement considering the coarser spatial resolution as compared to the airborne scale.
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Peter Coppo, Leandro Chiarantini, Luciano Alparone, "Validation and simulation examples of an end-to-end simulator for optical imaging systems", Proc. SPIE 8889, Sensors, Systems, and Next-Generation Satellites XVII, 88891N (24 October 2013); doi: 10.1117/12.2028965; https://doi.org/10.1117/12.2028965
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