fr.cnes.sirius.patrius.bodies

Interface ApparentRadiusProvider

All Superinterfaces:

Serializable

All Known Implementing Classes:

ConstantRadiusProvider, VariableRadiusProvider

public interface ApparentRadiusProvider
extends Serializable

Interface to represent apparent radius providers.

Method Summary

Modifier and Type	Method and Description
double	getApparentRadius(PVCoordinatesProvider pvObserver, AbsoluteDate date, PVCoordinatesProvider occultedBody, AbstractSignalPropagationDetector.PropagationDelayType propagationDelayType) Compute the apparent radius (in meters) of the occulting body from the spacecraft (observer) position.

Method Detail

getApparentRadius

double getApparentRadius(PVCoordinatesProvider pvObserver,
                         AbsoluteDate date,
                         PVCoordinatesProvider occultedBody,
                         AbstractSignalPropagationDetector.PropagationDelayType propagationDelayType)

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:

pvObserver - the spacecraft (observer) position-velocity

date - the date at which the signal is received by the observer (reception date)

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

propagationDelayType - propagation delay type

Returns:

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

Throws:

PatriusException - if the PVCoordinatesProvider computation fails