ssapy_toolkit.Orbital_Mechanics

Core orbital mechanics utilities (Keplerian, transfers, and fits).

Modules

all_orbit_quanities
burn_to_deltav(orbit, times, burn_ntw)	Compare continuous finite-duration NTW acceleration vs an instantaneous impulse applied at the mid-time of times.
calculate_finite_burn_acceleration(delta_v, ...)	Calculate the acceleration to approximate an instantaneous orbital transfer with a finite burn.
deltav_to_burn(orbit, times, delta_v_ntw)	Use a constant NTW acceleration across times such that a*duration = delta_v_ntw, and compare continuous vs impulsive results.
ellipse_fit(P1_m, P2_m, *[, a_m, e, F2_m, ...])
ellipse_from_rv(r, v[, num, f_span, t0])	Sample num points on the conic (ellipse / parabola / hyperbola) defined by state vector (r, v).
ellipse_inject(r, v, gamma)
equally_spaced_ta(n_samples[, orbit, a, e, ...])	Compute true anomalies (ta) for points approximately equally spaced by arc length around an elliptical orbit.
gamma_and_heading
keplerian	Keplerian orbital element conversions and utilities.
lagrange_points
launch_pads	dict() -> new empty dictionary dict(mapping) -> new dictionary initialized from a mapping object's (key, value) pairs dict(iterable) -> new dictionary initialized as if via: d = {} for k, v in iterable: d[k] = v dict(**kwargs) -> new dictionary initialized with the name=value pairs in the keyword argument list. For example: dict(one=1, two=2).
misc
orbital_accel_model_comparisons	SSAPy acceleration-ladder runner + accel-ladder-specific divergence dashboard.
orbital_comparison_stats
rv_to_ellipse(r, v, *[, t0, num, mu, R_body])	Return the ellipse-arc dictionary used by ellipse_arc.py.
synthetic_orbit_population(*[, M, N, dt, ...])	Create a synthetic ensemble (population) of SSAPy Orbit objects and sampled r(t), v(t) time series by perturbing all 6 classical Keplerian elements.
transfer_coplanar(*args[, r1, v1, r2, v2, ...])	Coplanar transfer shooter: enforces Δv lies in the plane of the initial orbit.
transfer_coplanar_continuous(r1, v1, r2[, ...])	Continuous‐thrust, coplanar transfer: thrust always lies in the initial orbital plane (normal = r1×v1), steering to rendezvous r2 (and optionally v2).
transfer_hohmann(*args[, r1, v1, r2, v2, ...])	Compute a Hohmann transfer between two orbits and return orbital parameters and delta-V.
transfer_inclination_continuous(r0, v0[, ...])
transfer_lambertian(*args[, r1, v1, r2, v2, ...])	Find transfer conic connecting r1 and r2, ensuring transfer arc stays above MIN_PERIGEE.
transfer_rendezvous(orbit1, orbit2[, tol, ...])	Finds the delta-v that leads to a transfer rendezvous with a moving target orbit.
transfer_shooter(*args[, r1, v1, r2, v2, ...])	Finds an initial delta-v that will lead to a transfer orbit with an arrival position within tol (in meters) of the target position r2.
transfer_shooter_continuous
transfer_velocity_and_inclination_continuous(r0, ...)
transfer_velocity_continuous(r0, v0[, ...])	Burn continuously in velocity direction until a specific accumulated delta_v magnitude is reached.