Tham khảo tài liệu 'advances in spacecraft technologies part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 270 Advances in Spacecraft Technologies satellite attitude. As a result the internal distortion in the scene is reduced. At present this technique is applicable to observation sensors with a similar parallel configuration on the focal plane such as EO-1 ALI QuickBird and FORMOSAT-2 although their observation bands exist in the visible wavelength. To increase the validity of the present work the following issues must be resolved the accuracy of tie point analysis the similarity measures between multi-modal images and the robustness of correction methods. Implementation into time delay integration TDI sensors is also important. The present method has been applied to investigate the pointing stability of the Terra spacecraft which has five scientific instruments. Although these instruments have a large rotating mirror and mechanical coolers analysis over ten years with sub-arcsecond accuracy has proved that the characteristic frequency of these instruments are not the source of the dynamic disturbance. What then is the source of the dynamic disturbance It is difficult to discuss this for the case of the satellites in orbit. The Terra weekly report stated on January 6 2000 The first of several planned attitude sensor calibration slews was successfully performed. Initial data indicates that the spacecraft jitter induced by the high-gain antenna is significantly reduced by the feedforward capability. 5. Acknowledgements This work was inspired by the ASTER science team and was developed by Y. Teshima M. Koga H. Kanno and T. Okuda students at the University of Tokyo under the support of Grants-in-Aid for Scientific Research B 17360405 2005 and 21360414 2009 from the Ministry of Education Culture Sports Science and Technology. The ASTER project is promoted by ERSDAC METI and NASA. The application to small satellites is investigated under the support of the Cabinet Office Government of Japan for funding under the FIRST Funding Program for World-Leading Innovative R D on .
