Time Delay and Integration CCD(TDI CCD) is a kind of CCD with frame structure and linear output

its charge transfer has certain directivity. Therefore

CCD integral direction and TDI CCD imagery heading must maintain certain relation for imaging. This article takes a push-broom and a whiskbroom scanning camera as examples

and introduces a graphing method based on Guassian imaging system to determine the relation between TDI CCD integral direction and sensor imagery heading. The conclusion is that integral direction must be in accordance with image motion direction. The result shows that this method is intuitional

practical and easy to determin TDI CCD integral direction

which is suitable for the practical engineering design.