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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 2F at 28.2E: General Discussion
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<blockquote data-quote="Waveguide" data-source="post: 869541" data-attributes="member: 364636"><p>If the center of the antenna lobes are kept pointing to the same spot in UK the movements</p><p>east-west and north-south will have different influence depending on the receiver location.</p><p>East-west movements of a satellite will have little influence NE and SW of UK. SE will see </p><p>the largest changes. If you fix the center of an ellipse with an imaginary pin in UK and the main </p><p>axis down over Italy and rotate it around the pin this will sort of simulate the changes in the </p><p>antenna coverage.</p><p> </p><p>I see nothing of the daily and yearly changes some of you experience and my position is</p><p>in the NE direction from central UK. It take this as evidence for the assumption that 2F is</p><p>kept pointing in the same direction towards UK regardless of any movements in its "box".</p><p> </p><p>The elliptical shape of the antenna lobe (2F UK spot) looks like the projection of a circular beam </p><p>on a sphere. If the lobe is noncircular, movements round the "roll-axis" would also change how </p><p>the reception is influenced. (and that would ruin my home-made theory)</p></blockquote><p></p>
[QUOTE="Waveguide, post: 869541, member: 364636"] If the center of the antenna lobes are kept pointing to the same spot in UK the movements east-west and north-south will have different influence depending on the receiver location. East-west movements of a satellite will have little influence NE and SW of UK. SE will see the largest changes. If you fix the center of an ellipse with an imaginary pin in UK and the main axis down over Italy and rotate it around the pin this will sort of simulate the changes in the antenna coverage. I see nothing of the daily and yearly changes some of you experience and my position is in the NE direction from central UK. It take this as evidence for the assumption that 2F is kept pointing in the same direction towards UK regardless of any movements in its "box". The elliptical shape of the antenna lobe (2F UK spot) looks like the projection of a circular beam on a sphere. If the lobe is noncircular, movements round the "roll-axis" would also change how the reception is influenced. (and that would ruin my home-made theory) [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 2F at 28.2E: General Discussion
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