As the resolving power of aerospace photography is demanded to be higher

the precision of IMC(Image Motion Compensation)system must be higher. For this reason

the sources for inducing image motion need to be considered more comprehensively. Namely

the measurement precision for all factors that affect the IM and the calculating modle for IM should be more accurate. In this paper

the coordiante transform methods were used to calculate the IMC of aerospace camera system. Firstly

the theory

the technical ways and the methods for realizing IMC in aerospace camera system were concluded ; Secondly

in form of homogeneous matrix

all the coordinate transformation were summed up

from which all the basic parts of IMC mathematics calculation model were realized and a general mathematics model for calculating IMC was put forward; Thirdly

the calculation of IMC using coordinate transform methods were expatiated. Finally

the methods of simplifying the vector expression of IM velocity and calculating the error of IMC were discussed birefly

so as to obtain the precise and simplified expressions of IM velocity and error estimation of IMC. Through changing the four parts of the calculation model

the method can be applied to IMC systems of all sorts of aerospace cameras.