I'm trying to take into account the Earth geopotential effect on the orbit. The only term I could consider, is
- Are the terms (J2, etc.) change with time?
- I found other terms coefficients here. How to add them also to differential equation, taken from here?
3.Why does the shown equation give 1 km error in 1 day in comparison with GMAT (configuration is below)? The coefficients for
Eq radius and
J2 are the same. The integrator is 9th order Runge-Kutta with