lsst.pipe.tasks.ssp.moid.MOIDSolver Class Reference

Public Member Functions
	__init__ (self, mu=GM_sun, n_samples=128, refine_factor=5.0, tol_MOID_abs=1e-7 *u.AU, tol_MOID_rel=1e-6, max_refine=10)
	compute (self, el1, el2)

Public Attributes
	mu = mu.to_value(u.km**3 / u.s**2) if hasattr(mu, "unit") else float(mu)
	n_samples = int(n_samples)
	refine_factor = float(refine_factor)
	tol_MOID_abs = tol_MOID_abs.to_value(u.AU)
	tol_MOID_rel = float(tol_MOID_rel)
	max_refine = int(max_refine)

Protected Member Functions
	_make_orbit_params (cls, a_AU, e, inc, Om, om)
	_moid_grid_search (self, p1, e1, Q1, p2, e2, Q2)

Static Protected Member Functions
	_make_rotation_matrix (inc, Om, om)
	_orbit_positions (p_AU, e, Q, f)
	_rv_from_params (p_AU, e, Q, f, mu_km3_s2)

Detailed Description

MOID solver using an adaptive 2D grid in (f1, f2).

Units:
  - Semi-major axes a: AU
  - Distances / MOID: AU
  - Velocities: km/s
  - μ: astropy quantity (km^3/s^2) or float
  - Public angles: degrees
  - Internal angles: radians

Definition at line 111 of file moid.py.

Constructor & Destructor Documentation

__init__()

lsst.pipe.tasks.ssp.moid.MOIDSolver.__init__	(		self,
			mu = GM_sun,
			n_samples = 128,
			refine_factor = 5.0,
			tol_MOID_abs = 1e-7 * u.AU,
			tol_MOID_rel = 1e-6,
			max_refine = 10 )

Definition at line 124 of file moid.py.

Member Function Documentation

_make_orbit_params()

lsst.pipe.tasks.ssp.moid.MOIDSolver._make_orbit_params ( cls, a_AU, e, inc, Om, om )

protected

Return p in AU, rotation matrix Q.

Definition at line 188 of file moid.py.

_make_rotation_matrix()

lsst.pipe.tasks.ssp.moid.MOIDSolver._make_rotation_matrix ( inc, Om, om )

staticprotected

Rz(Omega) * Rx(inc) * Rz(omega).

Definition at line 150 of file moid.py.

_moid_grid_search()

lsst.pipe.tasks.ssp.moid.MOIDSolver._moid_grid_search ( self, p1, e1, Q1, p2, e2, Q2 )

protected

Adaptive search in AU.
Returns: (MOID_AU, f1_best, f2_best)

Definition at line 245 of file moid.py.

_orbit_positions()

lsst.pipe.tasks.ssp.moid.MOIDSolver._orbit_positions ( p_AU, e, Q, f )

staticprotected

Vectorized positions in AU.

Definition at line 195 of file moid.py.

_rv_from_params()

lsst.pipe.tasks.ssp.moid.MOIDSolver._rv_from_params ( p_AU, e, Q, f, mu_km3_s2 )

staticprotected

Return (r in AU, v in km/s).

Definition at line 212 of file moid.py.

compute()

lsst.pipe.tasks.ssp.moid.MOIDSolver.compute	(		self,
			el1,
			el2 )

Compute MOID and related quantities.

el = (a_AU, e, inc_deg, Ω_deg, ω_deg)
Returns MOIDResult namedtuple.

Definition at line 312 of file moid.py.

Member Data Documentation

max_refine

lsst.pipe.tasks.ssp.moid.MOIDSolver.max_refine = int(max_refine)

Definition at line 143 of file moid.py.

mu

lsst.pipe.tasks.ssp.moid.MOIDSolver.mu = mu.to_value(u.km**3 / u.s**2) if hasattr(mu, "unit") else float(mu)

Definition at line 134 of file moid.py.

n_samples

lsst.pipe.tasks.ssp.moid.MOIDSolver.n_samples = int(n_samples)

Definition at line 136 of file moid.py.

refine_factor

lsst.pipe.tasks.ssp.moid.MOIDSolver.refine_factor = float(refine_factor)

Definition at line 137 of file moid.py.

tol_MOID_abs

lsst.pipe.tasks.ssp.moid.MOIDSolver.tol_MOID_abs = tol_MOID_abs.to_value(u.AU)

Definition at line 140 of file moid.py.

tol_MOID_rel

lsst.pipe.tasks.ssp.moid.MOIDSolver.tol_MOID_rel = float(tol_MOID_rel)

Definition at line 141 of file moid.py.

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The documentation for this class was generated from the following file:

• python/lsst/pipe/tasks/ssp/moid.py