jat.forces
Class Moon

java.lang.Object
  jat.forces.GravitationalBody
      jat.forces.Moon

All Implemented Interfaces:

EarthForceModel, ForceModel

public class Moon
extends GravitationalBody

Simple class to model the gravitational attraction of the moon.

Author:

Richard C. Page III

Constructor Summary

Moon()
Default constructor

Moon(boolean usematlab)
For use with matlab

Moon(double mjd_utc)
Allows the initialization of the Moon vector using DE405 ephemerides

Moon(double grav_mass, VectorN r, VectorN v)
Constructor

Method Summary

VectorN	acceleration(EarthRef eRef, Spacecraft sc) Compute the acceleration.
VectorN	acceleration(Time t, BodyRef bRef, Spacecraft sc) Call the relevant methods to compute the acceleration.
static void	main(java.lang.String[] args)
void	print(EarthRef ref)

Methods inherited from class jat.forces.GravitationalBody

accelPointMass, getPosition, getVelocity, updatePosition, updateVelocity

Methods inherited from class java.lang.Object

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

Constructor Detail

Moon

public Moon()

Default constructor

Moon

public Moon(double mjd_utc)

Allows the initialization of the Moon vector using DE405 ephemerides

Parameters:

mjd_utc - Modified Julian Date in Universal Coordinated Time

Moon

public Moon(boolean usematlab)

For use with matlab

Moon

public Moon(double grav_mass,
            VectorN r,
            VectorN v)

Constructor

Parameters:

grav_mass - [m^3/s^2]

r - position [m]

v - velocity [m/s]

Method Detail

acceleration

public VectorN acceleration(EarthRef eRef,
                            Spacecraft sc)

Compute the acceleration.

Specified by:

acceleration in interface EarthForceModel

Overrides:

acceleration in class GravitationalBody

Parameters:

eRef - Earth Reference

sc - Spacecraft parameters and state

Returns:

the acceleration [m/s^2]

acceleration

public VectorN acceleration(Time t,
                            BodyRef bRef,
                            Spacecraft sc)

Call the relevant methods to compute the acceleration.

Specified by:

acceleration in interface ForceModel

Overrides:

acceleration in class GravitationalBody

Parameters:

t - Time reference class

bRef - Body reference class

sc - Spacecraft parameters and state

Returns:

the acceleration [m/s^s]

print

public void print(EarthRef ref)

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException