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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Bubbler GPS/Android/Spotwalla Interface
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<blockquote data-quote="Top_Speed1" data-source="post: 1163469" data-attributes="member: 28614"><p>Well if you want to get technical somewhat...</p><p></p><p>Even a pure satellite spot tracker can loose or leave out plots (spots). Since the Satellites are geosynchronous at 22,300 miles exactly above the equator, and simply known as the Clarke belt (Arthur C. Clark), the angle or look to these satellite can be shaded by mountain ranges, tall buildings etc. Since GPS uses multiple birds, this gets minimized <em>sometimes.</em></p><p></p><p>The look angle changes depending on where you are. Take for example Kansas City; the Clarke belt will be a sweeping arc high to the south but low in the east and west. Pretty much a even look. Come way up north like to the Adirondacks (NY) and the Clarke belt will be low to the west (very like 15deg for the lowest GPS bird) and high; about 45 degrees elevation to the south.</p><p></p><p>So you can still have droppage with poor satellite positioning angles, especially with lets say a mountain range is right in the way of the signal/angle to the Clarke belt.</p><p></p><p><span style="font-size: 12px">btw- I didn't stay at a Holiday Inn Express last night, I went to school for this 'crap' lol, I was certified as an up & down link satellite technician in the late 80's. This was the 10+meter dish stuff, not the easy rinky dink 18" DTV dishes. But, I I did work for Eddy Hartenstein (Directv) in 1994 during the initial launch.</span></p><p></p><p><img src="https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Top_Speed1, post: 1163469, member: 28614"] Well if you want to get technical somewhat... Even a pure satellite spot tracker can loose or leave out plots (spots). Since the Satellites are geosynchronous at 22,300 miles exactly above the equator, and simply known as the Clarke belt (Arthur C. Clark), the angle or look to these satellite can be shaded by mountain ranges, tall buildings etc. Since GPS uses multiple birds, this gets minimized [I]sometimes.[/I] The look angle changes depending on where you are. Take for example Kansas City; the Clarke belt will be a sweeping arc high to the south but low in the east and west. Pretty much a even look. Come way up north like to the Adirondacks (NY) and the Clarke belt will be low to the west (very like 15deg for the lowest GPS bird) and high; about 45 degrees elevation to the south. So you can still have droppage with poor satellite positioning angles, especially with lets say a mountain range is right in the way of the signal/angle to the Clarke belt. [SIZE=12px]btw- I didn't stay at a Holiday Inn Express last night, I went to school for this 'crap' lol, I was certified as an up & down link satellite technician in the late 80's. This was the 10+meter dish stuff, not the easy rinky dink 18" DTV dishes. But, I I did work for Eddy Hartenstein (Directv) in 1994 during the initial launch.[/SIZE] [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png[/IMG] [/QUOTE]
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Bubbler GPS/Android/Spotwalla Interface
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