New Astronavigation Mod (ANM) – A Conception

silent marshal · 04-07-12, 05:28 AM

Quote:

Originally Posted by ETsd4

Sorry to say that, but that's not true.
A "graphical solution" for finding the FIXposition depends on Length/distances and arcs. The SHunter-world has different distances and different arcs. THere is a mismatch between the varying mercator-projection of the real world and the constant mercator-projection of SHunter.
The only places where SHunter and the real-world is fairly equivalent is near the equatorial region (real world= 60nm, SHunter= 64.79nm). There will be never ever a "graphical solution" you will draw with SH5 map-tools which your picture implies here ...

Hello ETsd4!

Thank you for your critical comment. You figured out, what is the difficult part of the problem. It seems that SH5 uses some sort of UTM (Universal Transverse Mercator) coordinate system. That means, that the higer to the north or south you are, the mote distances (width only) are streched. You can check this when you compare distances from SH5 with the ones in google earth. (I know, you are firm with all this, but maybe there are some readers who aren't.) For simming this means that you are travelling a greater distance as you would do in real world.

I have factored in this fact and that's what the "Horizontalversatz" is doing: it corrects the sphere/plane geometry of the "Höhendifferenzmethode" to the UTM system.

How my method works:
The calculation bases on a spherical system. Because of the great distances, we can transform it to a plane system, where circles are lines - that's what you are doeing in real world also. I can do this at the nav-map but consider not the coordinates of default SH5. Now I have to transfer the intersection point - which is the exact position at the sphere - to UTM of SH5 and this is done with the "Horizontalversatz".

I will make some more tests but I wonder if there are any errors left.

Critical comments always welcome! If I am wrong, ashes to my head and I will submerge into the deep of www.

If I am right, SH5 will be more exciting.