I saw David Ratti's question about Yuri Gagarin's voyage on Vostak 1 and how it was considered orbital, and that it was considered the first.
I was wondering what constitutes one full trip around the Earth, it was only considered "orbital" because he reached a distance and speed where he could have stayed in "orbit" around the Earth.
How is one full Orbit of the Earth Measured?
Point of Reference from Earth or Point of Reference from a stationary orbit plotted around the Earth that is not affected by it's rotation?
I am probably using the wrong terminology, I apologize.