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Message: <blockquote data-quote="Old Fred" data-source="post: 24212">The "Friday effect" isn't as daft as it seems. The Astra satellites are kept within a one kilometre cube of space. They drift around continually but are kept within the kilometre volume by small jets. To conserve fuel, these jets are operated as little as possible. So you can have circumstances where a satellite will be allowed to drift almost to the boundary of the imaginary cube before it is fired off to drift in the opposite direction.The effect is bound to be more noticeable with a satellite whose beam is very narrow - especially when you are located on the margin of the footprint.Fred</blockquote>