Abstract: Aiming at the critical problem of dimensional stability of high precision mapping satellite structure, an inversion algorithm of in-orbit temperature field of satellite structure was proposed by using the analysis model and the variation rule of in-orbit temperature. Furthermore, the predictive methods of the short-term and long-term angle stability of payloads mounting interface were proposed. And then based on the above methods, the predictive values of short-term and long-term structure stability of GF-7 satellite within the first month were presented. Finally, the results of short-term stability were analyzed statistically. The results show that the prediction results of the short-term stability meet the requirements.

Key words: GF-7 satellite, structure, dimensional stability, in-orbit measurement, thermal deformation analysis