fr.cnes.sirius.patrius.orbits.pvcoordinates

Class AlmanacPVCoordinates

java.lang.Object

fr.cnes.sirius.patrius.orbits.pvcoordinates.AlmanacPVCoordinates

All Implemented Interfaces:

PVCoordinatesProvider

public class AlmanacPVCoordinates
extends Object
implements PVCoordinatesProvider

This class implements the PVCoordinatesProvider to compute position velocity of a GPS or Galileo constellation satellite from its almanac parameters.

Since:

3.1

Version:

$Id: AlmanacPVCoordinates.java 17584 2017-05-10 13:26:39Z bignon $

Author:

chabaudp

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
AlmanacPVCoordinates(AlmanacParameter parameters, int cycle, double mu, double rotationRate) Creates an instance of AlmanacPVCoordinates.

Method Summary

Modifier and Type	Method and Description
PVCoordinates	getPVCoordinates(AbsoluteDate date, Frame frame) Geometric computation of the position to a date.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AlmanacPVCoordinates

public AlmanacPVCoordinates(AlmanacParameter parameters,
                            int cycle,
                            double mu,
                            double rotationRate)

Creates an instance of AlmanacPVCoordinates.

Parameters:

parameters - Almanac parameters

cycle - number of cycles

mu - earth's gravitational constant

rotationRate - earth's rotation rate

Since:

3.1

Method Detail

getPVCoordinates

public PVCoordinates getPVCoordinates(AbsoluteDate date,
                                      Frame frame)
                               throws PatriusException

Geometric computation of the position to a date. Computes a finite difference between position at date minus step and position at date plus step. If Input frame is null, results are expressed in WGS84.

Specified by:

getPVCoordinates in interface PVCoordinatesProvider

Parameters:

date - Date to compute coordinates

frame - Results expression frame.

Returns:

position velocity coordinates at input date in frame

Throws:

PatriusException - if input frame is different from WGS84 and configuration has not been defined