fr.cnes.sirius.patrius.stela
Class StelaSpacecraftFactory

java.lang.Object
  fr.cnes.sirius.patrius.stela.StelaSpacecraftFactory

public final class StelaSpacecraftFactory
extends Object

Utility class to build Stela spacecrafts

Since:

1.3

Version:

$Id: StelaSpacecraftFactory.java 12556 2015-03-10 12:30:04Z bignon $

Author:

Rami Houdroge

Concurrency :

unconditionally thread-safe

Concurrency comment :

access to the only static field is synchronized

Method Summary

static Assembly	createStelaCompatibleSpacecraft(String mainPartName, double mass, double dragArea, double dragCoefficient, double srpArea, double srpReflectionCoefficient) Utility method to create a STELA Assembly, made of a sphere with both radiative and aerodynamic properties.
static Assembly	createStelaRadiativeSpacecraft(String mainPartName, double mass, double srpArea, double srpReflectionCoefficient) Utility method to create a STELA Assembly, made of a sphere with only radiative properties.

Methods inherited from class java.lang.Object

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

Method Detail

createStelaCompatibleSpacecraft

public static Assembly createStelaCompatibleSpacecraft(String mainPartName,
                                                       double mass,
                                                       double dragArea,
                                                       double dragCoefficient,
                                                       double srpArea,
                                                       double srpReflectionCoefficient)
                                                throws OrekitException

Utility method to create a STELA Assembly, made of a sphere with both radiative and aerodynamic properties.

The reflection coefficient C_r (parameter srpReflectionCoefficient) is related to the diffuse reflection coefficient k_d as per :

 kd = (Cr - 1) * 9 / 4.
 

Parameters:

mainPartName - name of spacecraft

mass - mass of spacecraft

dragArea - drag area of spacecraft

dragCoefficient - drag coefficient of spacecraft

srpArea - radiative are of spacecraf

srpReflectionCoefficient - reflection coefficient of spacecraft

Returns:

the assembly

Throws:

OrekitException - if the mass is negative (OrekitMessages.MASS_ARGUMENT_IS_NEGATIVE)

createStelaRadiativeSpacecraft

public static Assembly createStelaRadiativeSpacecraft(String mainPartName,
                                                      double mass,
                                                      double srpArea,
                                                      double srpReflectionCoefficient)
                                               throws OrekitException

Utility method to create a STELA Assembly, made of a sphere with only radiative properties.

The reflection coefficient C_r (parameter srpReflectionCoefficient) is related to the diffuse reflection coefficient k_d as per :

 kd = (Cr - 1) * 9 / 4.
 

Parameters:

mainPartName - name of spacecraft

mass - mass of spacecraft

srpArea - radiative are of spacecraf

srpReflectionCoefficient - reflection coefficient of spacecraft

Returns:

the assembly

Throws:

OrekitException - if the mass is negative (OrekitMessages.MASS_ARGUMENT_IS_NEGATIVE)