Robert B From Robert Bennett Sun Jul 1 23:09:46 2007 Also, according to the citations, the Artemis team decided to slow down the satellite by ~200 m/s by firing RITA continuously in the opposite direction of motion for 340 days. Since the velocity is inversely proportional to the square root of the radius from Eq(3), this operation would cause the satellite to rise ~ 5000 km. You can't be serious. Reducing your velocity while in orbit will reduce your altitude not raise it. Unless of course you are basing your statement upon your own private definition of which direction any given satellite is orbiting. Are you so doing? Paul D ____________________________________________________________________________________ Yahoo!7 Mail has just got even bigger and better with unlimited storage on all webmail accounts. http://au.docs.yahoo.com/mail/unlimitedstorage.html