fr.cnes.sirius.patrius.propagation.events

Interface LocalRadiusProvider

All Superinterfaces:

Serializable

All Known Implementing Classes:

ConstantRadiusProvider, VariableRadiusProvider

public interface LocalRadiusProvider
extends Serializable

Interface to represent radius providers.

Method Summary

Modifier and Type	Method and Description
double	getLocalRadius(Vector3D posObserver, Frame frame, AbsoluteDate date, PVCoordinatesProvider occultedBody) Compute the apparent radius (in meters) of the occulting body from the spacecraft (observer) position.

Method Detail

getLocalRadius

double getLocalRadius(Vector3D posObserver,
                      Frame frame,
                      AbsoluteDate date,
                      PVCoordinatesProvider occultedBody)

Compute the apparent radius (in meters) of the occulting body from the spacecraft (observer) position. Given a plane containing the spacecraft (observer) position, the center of the occulting body and the center of the occulted body, and given a line contained within this plane, passing by the spacecraft (observer) position and tangent to the mesh of the occulting body, the apparent radius corresponds to the length of the line starting from the center of the occulting body, perpendicular to the first given line and ending at the intersection of the two lines.

Please notice that this method will for the moment be used only with an instantaneous propagation delay type.

Parameters:

posObserver - the spacecraft (observer) position

frame - the reference frame in which the spacecraft (observer) position is expressed

date - the date at which the spacecraft (observer) position is expressed

occultedBody - the body which is occulted to the spacecraft (observer) by the occulting body

Returns:

the apparent radius (in meters) of the occulting body from the spacecraft (observer) position

Throws:

PatriusException - if the PVCoordinatesProvider computation fails