On-Orbit Test of Modulation Transfer Function for Short-Wave Infrared Camera
Based on basic principle of slanted-edge for on-orbit test,the slanted-edge is introduced into the short-wave infrared band.By analyzing the on-orbit test processes,ground targets with clear boundaries are selected as edge images to calculate the modulation transfer function within the cut-off frequency.The results at the Nyquist frequency in the along-track and cross-track directions are approximately 0.1.The results show that the on-orbit slanted-edge-based modulation transfer function test method can overcome the limitations of ground pixel resolution on sampling areas,which is suitable for short-wave infrared cameras with small pixel arrays and low resolutions.
short-wave infrared bandslanted-edgemodulation transfer functionon-orbit test