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View Code? Open in Web Editor NEW:earth_asia: :satellite: :earth_asia: :satellite: FORMFLYT - High fidelity orbit propagation for formation flying control in MATLAB!
License: MIT License
:earth_asia: :satellite: :earth_asia: :satellite: FORMFLYT - High fidelity orbit propagation for formation flying control in MATLAB!
License: MIT License
In library/formflyt_orbits/kepler_states.m, line 39, should the x position be calculated as: pos_X=a*(cosd(eccAnom) + e); instead?
Eccentricity should cause the focus to translate in the positive x direction rather than the negative x direction?
๐น Goal: Figure out the extent of numerical integration errors using various tested numerical propagators.
We attempt to investigate a numerical propagator that should be efficient (i.e. Runge-Kutta variants) but not overly complex to the point that it makes orbit propagation slow on MATLAB, as we might need to propagate orbits for days, and for N number of satellites in an arbitrary configuration.
Current position propagation errors for a satellite with initial conditions:
a1 = 7000000; % Semi-major axis (m)
e1 = 0.001; % Eccentricity (unitless)
i1 = 10.00; % Inclination (degrees)
w1 = 90.00; % Arg of Periapsis (degrees)
R1 = 45.00; % Right Ascension (degrees)
M1 = -90.00; % Mean Anomaly (degrees)
Cd1 = 2.2; % Drag coefficient
Ar1 = 0.374; % Drag area (m^2)
Ms1 = 17.90; % Spacecraft mass (kg)
Propagator is a modified RK4 using the 3/8 rule, and the errors are compared with the analytical two-body solution (i.e. rotational solutions of an object about an elliptical orbit). Pretty significant errors.
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