Abstract. With the development of space optical remote sensing imaging technology, Space remote sensing systems have reached a new stage which is changing towards higher spatial resolution, higher spectral resolution, higher radiometric resolution, and higher temporal resolution. In recent years, applying TDI CCD to earth observation from space has become a growing trend, and it can make integrals to the same moving target by using multilevel sensitive units, which has improved the S/N and the dynamic range of optical system effectively. This paper proposes a semi-physical simulation system designed for space optical remote sensing based on 6-DOF motion platform. The system ignores the atmospheric radiation and it can obtain high quality images by simulating the whole physical process of the space optical remote sensing imaging chain which includes the sensor of TDI CCD, the motion platform of satellite, the ground scene, and the access to final remote sensing.

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