NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan
The 60th Japan National Congress for Theoretical and Applied Mechanics
Session ID : OS17-08
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OS17
Development of a cloud tracking system for Akatsuki
Kazunori OgoharaToru KouyamaHiroki YamamotoNaoki Sato*Masahiro TakagiTakeshi Imamura
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Abstract
We have constructed an automated cloud tracking system for processing data obtained by Japanese Venus Climate Orbiter, Akatsuki. In this system, correction of the pointing of the satellite is essentially important for improving accuracy of the cloud motion vectors derived using the cloud tracking. Attitude errors of the satellite are reduced by fitting an ellipse to limb of an imaged Venus disk. Longitude-latitude distributions of brightness (cloud patterns) are calculated on grids distributed at regular intervals. By tracking the cloud features on these images, we can obtain cloud motion vectors. It is shown by several tests that the cloud motion vectors are determined with a sufficient accuracy. These entire processes are pipelined and automated, and are applied to all data obtained by Akatsuki. We expect that constant quality data created by the automated cloud tracking system will contribute to the Venus meteorology.
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© 2011 The Japan Society of Mechanical Engineers
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