I have believed from many years that jerky motion of satellites is due to saccades. Google on Saccadic motion for detailed description. regards Russell -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.7/435 - Release Date: 31/08/2006 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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