ThreeAngleOrbitSolver

class ssapy.orbit_solver.ThreeAngleOrbitSolver(e1, e2, e3, R1, R2, R3, t1, t2, t3, mu=398600441800000.0, tol=1e-08, maxiter=100)

Bases: object

Determine orbit of satellite for set of three angle-only observations.

Might only work well for smallish changes in sector position of observations.

Parameters:

• e1 ((3,) array_like) – Unit vectors indicating observed directions (dimensionless).

• e2 ((3,) array_like) – Unit vectors indicating observed directions (dimensionless).

• e3 ((3,) array_like) – Unit vectors indicating observed directions (dimensionless).

• R1 ((3,) array_like) – Vectors indicating the positions of the observers (in meters).

• R2 ((3,) array_like) – Vectors indicating the positions of the observers (in meters).

• R3 ((3,) array_like) – Vectors indicating the positions of the observers (in meters).

• t1 (float or astropy.time.Time) – Times of observations. If float, then should correspond to GPS seconds; i.e., seconds since 1980-01-06 00:00:00 UTC

• t2 (float or astropy.time.Time) – Times of observations. If float, then should correspond to GPS seconds; i.e., seconds since 1980-01-06 00:00:00 UTC

• t3 (float or astropy.time.Time) – Times of observations. If float, then should correspond to GPS seconds; i.e., seconds since 1980-01-06 00:00:00 UTC

• mu (float, optional) – Gravitational constant of central body in m^3/s^2. (Default: Earth’s gravitational constant in WGS84).

• tol (float, optional) – Tolerance to use to stop iteratively improving solution. (default 1e-8).

• maxiter (int, optional) – Maximum number of iterations to use. (default: 100)

Attributes Summary

D	meant to be used for lazy evaluation of an object attribute.
D11	meant to be used for lazy evaluation of an object attribute.
D12	meant to be used for lazy evaluation of an object attribute.
D13	meant to be used for lazy evaluation of an object attribute.
D21	meant to be used for lazy evaluation of an object attribute.
D22	meant to be used for lazy evaluation of an object attribute.
D23	meant to be used for lazy evaluation of an object attribute.
D31	meant to be used for lazy evaluation of an object attribute.
D32	meant to be used for lazy evaluation of an object attribute.
D33	meant to be used for lazy evaluation of an object attribute.
d1	meant to be used for lazy evaluation of an object attribute.
d2	meant to be used for lazy evaluation of an object attribute.
d3	meant to be used for lazy evaluation of an object attribute.
t21	meant to be used for lazy evaluation of an object attribute.
t2131	meant to be used for lazy evaluation of an object attribute.
t31	meant to be used for lazy evaluation of an object attribute.
t32	meant to be used for lazy evaluation of an object attribute.
t3231	meant to be used for lazy evaluation of an object attribute.

Methods Summary

solve()

Attributes Documentation

D

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D11

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D12

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D13

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D21

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D22

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D23

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D31

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D32

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

D33

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

d1

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

d2

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

d3

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

t21

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

t2131

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

t31

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

t32

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

t3231

meant to be used for lazy evaluation of an object attribute. property should represent non-mutable data, as it replaces itself.

Methods Documentation

solve()