As the CAE technology developed

detecting image simulation plays a more and more important role during the feasibility argumentation

scheme argumentation

scheme design

design

manufacture

fabrication

and test of orbiting optical camera for space-based measurement. In this paper

relative kinematics model and catoptrics character model

imaging model of camera

and imaging model of background stars are built and the digital simulation system for detecting image of orbital optical camera is designed and realized on the base of analyzing the measurement principle and work environment of space-based optical camera

when the camera performing the mission of space-based optical measure. Measurement noises and detecting sensitivity are analyzed and the effect of all kinds of disturb factors on the image are taken into accounts in the simulation modeling. Equivalent calculation from the visible magnitude of background stars to instrument magnitude is conducted through the detecting wave band of the camera to improving the fidelity of simulated images. Finally

the simulation software is realized by means of Visual C++ and OpenGL on the base of designing the simulation flow.