Study on Space-Borne Remote Sensing Imaging System by MagicGrid Methodology

With the rapid growth of the space - borne imaging system complexity, the comparison and iteration of multiple schemes need to be solved. The space-borne camera radiance transfer model, the requirement model, the system architecture model, the calculation and analysis model and the generalization relationship is built by MagicGrid Methodology. The comparative analysis results show that the different solutions results are presented more intuitively and the iteration speed is faster significantly. The solution No. 2, No. 4 and No. 5 can meet the requirement of the SNR (>50 dB) in the condition of the same imaging electric circuit (the correlated double sampling), the same orbit measurement system (500 km altitude obit) and the same land position (45°northern latitude). The SNR using off-axis three mirrors optical system is higher than the one using coaxial three mirror system or transmission system in the condition of the same detector, and the SNR using TDICCD is higher than the one using TDICMOS, CCD and CMOS in the condition of the same optical system.