Instrument Simulation of Multispectral Remote Sensing Images in the Frame of GF-4 Satellite System

摘要

The instrument simulation of space-borne remote sensing systems is an important work for theadaptation and optimization of fundamental instrument parameters for a sensor and its observationconditions. The multispectral imaging simulator has been developed with the framework of GF-4mission, which is a geostationary satellite in the national high-resolution earth observation system ofChina. The presented simulator consists of two processing modules producing GF-4 like digitalnumber data in VNIR and MIR bands. The first processing module converts at sensor radiance tophotons considering the spectral response, optical transmission, noise, modulation transfer function(MTF), et al. The second part of the simulation is electronic data processing module including ananalogue-to-digital converter. The verification of the simulation is performed by comparing the realoutput of radiometric calibration in laboratory with simulated DN. Analysis of the final simulationdata has shown the accurate and reliable performance of the established simulator enabling thesystem to support technical decision-making processes required for the development of the nextgeneration geostationary satellite.