archived link for image links seem dead https://web.archive.org/web/20060711045257/https://lea.hamradio.si/~s53mv/navsats/theory.html https://web.archive.org/we

archived link for image links seem dead https://web.archive.org/web/20060711045257/https://lea.hamradio.si/~s53mv/navsats/theory.html https://web.archive.org/web/20060711045257/https://lea.hamra...