pyRTX.classes.Spacecraft

Classes

Spacecraft([name, base_frame, ...])

This is the main class for defining spacecraft objects.

class pyRTX.classes.Spacecraft.Spacecraft(name=None, base_frame=None, spacecraft_model=None, units='m', mass=0.0)[source]

This is the main class for defining spacecraft objects.

__init__(name=None, base_frame=None, spacecraft_model=None, units='m', mass=0.0)[source]

Parameters:

name (str) – Spacecraft name
base_frame (str) – Spacecraft body (base) frame
spacecraft_model (dict) – dict of {file:str, frame_type:str, frame_name:str, center:list, specular:float, diffuse:float, UD_rotation:trimesh.rotation}
of (a dictionary with keys the name) –

file: str
the obj file for the part

frame_type: str
’Spice’ or ‘UD’ to choose wether to define a reference to a spice frame or UserDefined one in the case of ‘UD’ a rotation matrix must be specified in the UD_rotation (optional) key

frame_name: str
The name of the Spice (or UD) frame

center: list
position of the origin of the object (in km) with respect to the base frame

specular: float
specular coefficient

diffuse: float
diffuse coefficient

UD_rotation: trimesh.rotation
optional specify a user defined rotations matrix
units (str) – units for transformations
mass (float or nc file) – Spacecraft mass. Can be a float value or an xarray with times and mass values

Returns:

bla

Return type:

pyRTX.classes.Spacecraft

add_parts(spacecraft_model=None)[source]: Add parts to the model instance :param spacecraft_model: See the main constructor documentation :type spacecraft_model: dict

subset(elem_names)[source]: Return an instance of Spacecraft with only the elements contained in the list elem_names. Suppose the Spacecraft (self) is composed of elements A,B,C Spacecraft.subset([‘A’,’B’]) would return a new instance of Spacecraft with only the elements A and B

apply_transforms(epoch)[source]

Method to rotate and translate the components.

Parameters: - epoch: epoch of the transformation