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The measurement technology of VCM (Vision-based 3-D Coordinate Measurement) has the characteristics of intellectualized measurement and realization of noncontact measurement. It can expand the usage range of 3D coordinate measurement technology. It is the kind of measurement technology which has good development prospects. The process of determining the projection parameters is called calibration. In this paper, the parameters are calibrated without errors.

In this article, a radar with the characteristics of expenditure, short-period of research that can be designed to search and to detect effectively the low-altitude targets in a certain coverage is put forward. As for that of the airborne warning radar, many technological problems should still be worth discussing, especially in the signal-processing area.