I have a question. I want to change the Init time to perform the OD using OrbitDetermination.java in the tutorial. So I changed orbit.date to a different time in orbit-determination.in file. and then when I run the OrbitDetermination.java, I was faced with a error, ‘altitude is below the 120,000 m allowed threshold’. But my orbit’s semi-major axis is 7000km, eccentricity is about zero. Maybe Altitude is about 700km.
How should I address the problem?