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<blockquote data-quote="grubstake" data-source="post: 678688" data-attributes="member: 4012"><p>For a rough comparison of the ranges necessary for the earthbound equipment, these are the orbit heights above Earth of the various well-known communications system satellites:</p><p>NBN Sky Muster (geo-stationary/fixed orbit) = 35,768 km</p><p>Iridium (Low Earth Orbit) = 485 km</p><p>Starlink (Low Earth Orbit) = 340-614 km</p><p></p><p>Geo-stationary satellites orbit at the same speed that the Earth rotates, so they are always at the the same place in the sky above, but a very long distance away. Low Earth Orbit satellites move across the sky, so a phone using them is constantly tracking the nearest members of the satellite constellation and switching seamlessly between them to maintain its communications link. This is basically the same thing earthbound mobile phones do with cell towers as the phone is moved from place to place, but over a much greater distance with the satellites.</p></blockquote><p></p>
[QUOTE="grubstake, post: 678688, member: 4012"] For a rough comparison of the ranges necessary for the earthbound equipment, these are the orbit heights above Earth of the various well-known communications system satellites: NBN Sky Muster (geo-stationary/fixed orbit) = 35,768 km Iridium (Low Earth Orbit) = 485 km Starlink (Low Earth Orbit) = 340-614 km Geo-stationary satellites orbit at the same speed that the Earth rotates, so they are always at the the same place in the sky above, but a very long distance away. Low Earth Orbit satellites move across the sky, so a phone using them is constantly tracking the nearest members of the satellite constellation and switching seamlessly between them to maintain its communications link. This is basically the same thing earthbound mobile phones do with cell towers as the phone is moved from place to place, but over a much greater distance with the satellites. [/QUOTE]
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