### Satellite real length

posted by julien at Mar 31, 2006 8:17 PM
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Dear Ikeda,

Sorry to answer so late, quite busy these last times. First of all, and for the name of the community, thank you for your CAD file. This is a great contribution.

Now, to anwser to your question: The real size of your S/C is directly defined by the coordinates of the points used in the CAD. For example, you can find below an example of sphere of radius 1.0 (this can be changed in another value). To have a larger sphere, you can just change these coordinates. The same idea can be used to set the object not centered on the origin.

The resolution (here 0.5) is only given to define the local characteristic scale of the mesh. it must be lower than the size of the object… of course.

In SPIS-NUM, for the numerical kenel the unit is the meter. The S/C must be defined in meter.

Last point, you can also used the translate/rotate/scale capacities of Gmsh. However, in this case you must then saved your S/C as unrolled geo file. Ths problem has been solved in the last version of SPIS, which must be released soon.

Best,

Ju.

```// coordinate of the nodes
Point(1) = {1,0,0,0.5};         // the format is Point(node Id) = {x, y, z, resolution};
Point(2) = {-1,0,0,0.5};
Point(3) = {0,1,0,0.5};
Point(4) = {0,-1,0,0.5};
Point(5) = {0,0,1,0.5};
Point(6) = {0,0,-1,0.5};
Point(8) = {0,0,0,0.5};// curves to define the
Circle(1) = {4,8,1};
Circle(2) = {4,8,5};
Circle(3) = {1,8,5};
Circle(4) = {4,8,2};
Circle(5) = {2,8,5};
Circle(6) = {2,8,3};
Circle(7) = {3,8,1};
Circle(8) = {6,8,3};
Circle(9) = {6,8,2};
Circle(10) = {6,8,4};
Circle(11) = {6,8,1};
Circle(12) = {3,8,5};//line loops to define the surface of the object.
Line Loop(13) = {4,-9,10};
Ruled Surface(14) = {13};
Line Loop(15) = {-2,4,5};
Ruled Surface(16) = {15};
Line Loop(17) = {-5,6,12};
Ruled Surface(18) = {17};
Line Loop(19) = {-6,-9,8};
Ruled Surface(20) = {19};
Line Loop(21) = {-3,-1,2};
Ruled Surface(22) = {21};
Line Loop(23) = {-3,-7,12};
Ruled Surface(24) = {23};
Line Loop(25) = {-7,-8,11};
Ruled Surface(26) = {25};
Line Loop(27) = {1,-11,10};
Ruled Surface(28) = {27};```

posted by Kouichirou Ikeda at Dec 22, 2005 11:14 AM
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