empyrean.ConstantRTN

class ConstantRTN(alpha_rad, beta_rad)

Bases: object

Constant RTN steering angles relative to the arc’s central body.

The thrust direction is

$$\hat{d} = \cos\beta\cos\alpha\;\hat{R} + \cos\beta\sin\alpha\;\hat{T} + \sin\beta\;\hat{N}$$

where $\alpha$ is the in-plane angle (radial toward transverse) and $\beta$ is the out-of-plane angle (toward orbit normal).

Methods

__init__(alpha_rad, beta_rad)

Attributes

alpha_rad	In-plane angle from radial toward transverse (radians).
beta_rad	Out-of-plane angle toward orbit normal (radians).

Parameters:

• alpha_rad (float)

• beta_rad (float)

alpha_rad: float

In-plane angle from radial toward transverse (radians).

beta_rad: float

Out-of-plane angle toward orbit normal (radians).