Triantriangle mesh

I want to make mesh like this, can you help me?
8m 10m 3m elipsoid


if you want help it is better that you gave more information. You can read advice’s here.

Here are some problems on your questions :

Ellipsoid, why not posting the geometry you have done ?

Is it open (not an ellipsoid) or closed ? From your screen capture it looks like half or less ellipsoid !!!

Why not giving the reference from your second image ? it is an old work from @Arthur_Mamou-Mani