The development of very high resolution observation satellites has led to microdynamic problems. The quality of the images produced by reconnaissance satellites implies that they observe stringent line-of-sight stability requirements. The aims of this paper are to present the methodologies used at MATRA MARCONI SPACE (MMS) and to show the importance of tests in the prediction and verification logic. In the first part, stability requirements for reconnaissance satellites are reviewed. Constraints issued from new signal processing technologies are presented. In the second part, microvibration sources, their propagation throughout the satellite and their effects on the line-of-sight (LOS) are detailed. The prediction and verification logic is described in the third part. It is based on an intimate combination of analyses and tests at equipment, subsystem and satellite levels: the proposed approach for microdynamics is similar to thermal and mechanical processes using hierarchical specifications, tests, analyses, and interface control documents. Finally, several examples of microdynamic tests performed at MMS on reconnaissance satellites are presented to illustrate their major contributions to high frequency pointing requirements demonstration.
Mastering the Effect of Microvibrations on the Performances of Reconnaissance Satellites
1995
11 pages
Report
No indication
English
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