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Fringe Reception General
Inclined Birds ..
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<blockquote data-quote="Analoguesat" data-source="post: 745433" data-attributes="member: 176362"><p>Heres a quick heads up on interpreting the tracking charts on the n2yo site. The picture happens to be Astra 1C but its the same for all the inclined orbit broadcast sats.</p><p></p><p>The blue line over on the left here is the sunrise / sunset line.</p><p></p><p>The elderly Astra is the icon in the middle of the screen and the yellow line is a representation of the up down wobble. (Basically an elongated figure 8 with the "waist" of the 8 being on the main orbital plane)</p><p></p><p>The arrow near the icon is useful - it shows which way the satellite is moving - in this particular case its moving south back towards the main orbital plane and so dishes without inclined tracking have a chance to receive the signals in the next couple of hours.</p><p></p><p>Over on the right the most useful figures are the latitude and longitude information - they show where the bird actually is.</p><p></p><p>Please note whilst the tracking sites are useful for geostationary satellites OR satellites where the orbital parameters dont change they do tend to fall down when a broadcast satellite is being moved to a new slot - it can take a few weeks for the ephemeris data about the orbits to be updated.</p><p></p><p>Some of the old long retired birds have interesting orbital wiggles - not only are they doing their inclined figure 8 but drifting in graveyard orbit too <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="Analoguesat, post: 745433, member: 176362"] Heres a quick heads up on interpreting the tracking charts on the n2yo site. The picture happens to be Astra 1C but its the same for all the inclined orbit broadcast sats. The blue line over on the left here is the sunrise / sunset line. The elderly Astra is the icon in the middle of the screen and the yellow line is a representation of the up down wobble. (Basically an elongated figure 8 with the "waist" of the 8 being on the main orbital plane) The arrow near the icon is useful - it shows which way the satellite is moving - in this particular case its moving south back towards the main orbital plane and so dishes without inclined tracking have a chance to receive the signals in the next couple of hours. Over on the right the most useful figures are the latitude and longitude information - they show where the bird actually is. Please note whilst the tracking sites are useful for geostationary satellites OR satellites where the orbital parameters dont change they do tend to fall down when a broadcast satellite is being moved to a new slot - it can take a few weeks for the ephemeris data about the orbits to be updated. Some of the old long retired birds have interesting orbital wiggles - not only are they doing their inclined figure 8 but drifting in graveyard orbit too :D [/QUOTE]
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Fringe Reception General
Inclined Birds ..
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