Image quality evaluation of space optical remote sensor with segmented mirror

The design of segmented mirror is an effective way to increase the resolution of space optical remote sensor. We analyze the gaps and piston that affecting the system imaging performance. The corresponding Point Spread Function (PSF), modulation transfer functions (MTF) and SR (Strehl Ratio) are presented. The General Image Quality Equation (GIQE) is used to Linking NIIRS to those effects to provide engineering the criteria for system performance. We show an example of how NIIRS is applied to measure the influence of these effects on system performance. In the example, the Delta NIIRS is computed by GIQE. Delta NIIRS is performed to measure small loss in image quality. When the A Delta NIIRS is more than 0.2, the loss of image quality are non-negligible. The experiment show the NIIRS can provide a simple, yet powerful, tool for assessing and communicating image quality and sensor system requirements.