adam_core.orbits.spice_kernel module

adam_core.orbits.spice_kernel.fit_chebyshev(coordinates: CartesianCoordinates, window_start: float, window_end: float, degree: int) → tuple[ndarray, float, float][source]

Fit Chebyshev polynomials to position and velocity data.

Parameters:

  • coordinates (CartesianCoordinates) – Coordinates to fit

  • window_start (float) – Start time in ET seconds

  • window_end (float) – End time in ET seconds

  • degree (int) – Degree of Chebyshev polynomials

Returns:

(coefficients, mid_time, half_interval) coefficients has shape (6, degree+1)

Return type:

tuple

adam_core.orbits.spice_kernel.orbits_to_spk(orbits: Orbits, output_file: str, start_time: Timestamp, end_time: Timestamp, propagator: Propagator | None = None, max_processes: int | None = None, step_days: float = 0.25, target_id_start: int = 1000000, window_days: float = 32.0, comment: str = 'SPK file generated from adam_core Orbits', kernel_type: str = 'w03') → Dict[str, int][source]

Convert Orbits object to a SPICE SPK file using Chebyshev polynomials (Type 3).

adam_core.orbits.spice_kernel.write_spkw03_segment(propagated_orbit: Orbits, handle: int, target_id: int, start_time: float, end_time: float, window_seconds: float = 86400.0, cheby_degree: int = 15) → None[source]
adam_core.orbits.spice_kernel.write_spkw09_segment(propagated_orbit: Orbits, handle: int, target_id: int, start_time: float, end_time: float) → None[source]