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| Here is an array of 125 server-sats in a 3 dimensional equal-spacing grid, looking inwards towards the ground as the array completes a 4 hour orbit. The rows of five server-sats follow each other in their orbits, separated very slightly in time. You can see the rows apparently rotating away and backwards, or towards and forwards, completing a rotation around the central orbit (yellow) once per orbit. Watch the white circles make one loop, from back to top to front to bottom and back again. | Here is an array of 125 server-sats in a 3 dimensional equal-spacing grid, looking inwards towards the ground as the array completes a 4 hour orbit. The rows of five server-sats follow each other in their orbits, separated very slightly in time. You can see the rows apparently rotating away and backwards, or towards and forwards, completing a rotation around the central orbit (gray) once per orbit. Watch the white circles make one loop, from back to top to front to bottom and back again. |
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| The server-sats are actually smaller compared to their spacing, and slightly offset so they do not obscure each other's path to the | As a row of server-sats moves from the back towards the top, it moves forwards in the orbit by twice its spacing from the center orbit. This is '''apogee skew''', where the satellites at the midpoints between perigee and apogee are skewed towards apogee. This skew is caused by the higher speed and shorter path on the perigee side of the orbit. Server-sat sizes are exaggerated compared to their spacing, and the whole array shown orbiting the earth is hugely exaggerated. The server-sats are actually smaller compared to their spacing, and slightly offset so they do not obscure each others radio path to the |
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| <<EmbedObject(ap01.swf,play=true,loop=true,width=1024,height=600)>> | <<EmbedObject(ap02.swf,play=true,loop=true,width=1000,height=600)>> |
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| [[attachment:ap01.c | ap01.c source ]] ... (needs libgd and swftools package) | [[attachment:ap02.c | ap02.c source ]] ... (needs libgd and swftools package) |
Toroidal Orbits
t01.c source - - - - tor00.hc subroutines and include file
t04.c source - - - - tor00.hc subroutines and include file
t08.c source - - - - tor00.hc subroutines and include file
t12.c source - - - - tor00.hc subroutines and include file
t16.c source - - - - tor00.hc subroutines and include file
t24.c source - - - - tor00.hc subroutines and include file
t25.c source - - - - tor00.hc subroutines and include file
t26.c source - - - - tor00.hc subroutines and include file
t27.c source - - - - tor00.hc subroutines and include file
t28.c source - - - - tor00.hc subroutines and include file
t41.c source - - - - tor00.hc subroutines and include file
t42.c source - - - - tor00.hc subroutines and include file
Apogee Skew
Here is an array of 125 server-sats in a 3 dimensional equal-spacing grid, looking inwards towards the ground as the array completes a 4 hour orbit. The rows of five server-sats follow each other in their orbits, separated very slightly in time. You can see the rows apparently rotating away and backwards, or towards and forwards, completing a rotation around the central orbit (gray) once per orbit. Watch the white circles make one loop, from back to top to front to bottom and back again.
As a row of server-sats moves from the back towards the top, it moves forwards in the orbit by twice its spacing from the center orbit. This is apogee skew, where the satellites at the midpoints between perigee and apogee are skewed towards apogee. This skew is caused by the higher speed and shorter path on the perigee side of the orbit.
Server-sat sizes are exaggerated compared to their spacing, and the whole array shown orbiting the earth is hugely exaggerated. The server-sats are actually smaller compared to their spacing, and slightly offset so they do not obscure each others radio path to the ground, or shade each other from the sun. They also have offsets to reduce grating lobes in the RF pattern. But the even spacing is prettier...
Upload new attachment "ap02.swf"
ap02.c source ... (needs libgd and swftools package)