To acquire and real time process Space target information for Space-based detection systems is a challenging problem. The simulation for space-based detection systems are much more concerned in recently years. Dynamic IR image sequences generation of space target is one of the key technology. In the previous method

target temperature model is calculated by node network technique

it is high precision but consume computation

which is not necessary for point target image generation. Because the space target is very long distance from the satellite-based sensors

and the size of target is much smaller than the sensor's spatial resolution. Otherwise

the kinetic error of vehicles

the measuring error of sensors and electronic noise of PFA are not concluded in them. So

the generated images by using the previous method could not assure the validity of the simulation for space-based detection systems. In this paper

A new simulation method of IR sequence image generation for point target in deep space background based on STK and MATLAB is presented. A simple isothermal model is used to calculate the temperature of the space targets

and A model of celestial background based on MSX (Midcourse Space Experiment) IR stellar catalog is presented

Conversion model between the Irradiance of target/background and the image gray is established by calculating the electron numbers that received by the detectors. Disturbance error of satellite

measuring error of sensors and electronics noise of FPA are modeled in the simulation. it makes the generated image almost reflecting the real world. At anytime

any viewpoint and any FOV's IR sequential images from which waveband 4 to 26μm can be simulated using our method. At last of the paper

an IR image sequences of some point target are implemented. The image generation technique that presented in this paper has three merits than the previous method. The first

it is computation efficiency as the reduced target temperature model. Second

the celestial background model that presented extends the LRS stellar catalog included 5425 to the MSX stellar catalog of 177886

and the smaller FOV of sensor can be simulated. which extends the field of application of the simulation for space-based system. the third

the more complete model than previous methods is presented

included the Disturbance error of satellite

measuring error of sensors and electronics noise of FPA. and the simulated images can almost reflect the real world.