org.orekit.propagation.semianalytical.dsst.utilities

Class FieldGHmsjPolynomials<T extends CalculusFieldElement<T>>

java.lang.Object

org.orekit.propagation.semianalytical.dsst.utilities.FieldGHmsjPolynomials<T>

public class FieldGHmsjPolynomials<T extends CalculusFieldElement<T>>
extends Object

Compute the G_ms^j and the H_ms^j polynomials in the equinoctial elements h, k and the direction cosines α and β and their partial derivatives with respect to k, h, α and β.

The expressions used are equations 2.7.5-(1)(2) from the Danielson paper.

Author:

Romain Di Costanzo, Bryan Cazabonne (field translation)

Constructor Summary

Constructors

Constructor and Description
FieldGHmsjPolynomials(T k, T h, T alpha, T beta, int retroFactor, Field<T> field) Create a set of Gmsj and Hmsj polynomials.

Method Summary

Modifier and Type	Method and Description
T	getdGmsdAlpha(int m, int s, int j) Get the dGmsj / dα coefficient.
T	getdGmsdBeta(int m, int s, int j) Get the dGmsj / dβ coefficient.
T	getdGmsdh(int m, int s, int j) Get the dGmsj / dh coefficient.
T	getdGmsdk(int m, int s, int j) Get the dGmsj / dk coefficient.
T	getdHmsdAlpha(int m, int s, int j) Get the dHmsj / dα coefficient.
T	getdHmsdBeta(int m, int s, int j) Get the dHmsj / dβ coefficient.
T	getdHmsdh(int m, int s, int j) Get the dHmsj / dh coefficient.
T	getdHmsdk(int m, int s, int j) Get the dHmsj / dk coefficient.
T	getGmsj(int m, int s, int j) Get the Gmsj coefficient.
T	getHmsj(int m, int s, int j) Get the Hmsj coefficient.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldGHmsjPolynomials

public FieldGHmsjPolynomials(T k,
                             T h,
                             T alpha,
                             T beta,
                             int retroFactor,
                             Field<T> field)

Create a set of G_ms^j and H_ms^j polynomials.

Parameters:

k - X component of the eccentricity vector

h - Y component of the eccentricity vector

alpha - direction cosine α

beta - direction cosine β

retroFactor - -1 if the orbit is represented as retrograde, +1 otherwise

field - field element

Method Detail

getGmsj

public T getGmsj(int m,
                 int s,
                 int j)

Get the G_ms^j coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

the G_ms^j

getHmsj

public T getHmsj(int m,
                 int s,
                 int j)

Get the H_ms^j coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

the H_ms^j

getdGmsdk

public T getdGmsdk(int m,
                   int s,
                   int j)

Get the dG_ms^j / d_k coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dG_ms^j / d_k

getdGmsdh

public T getdGmsdh(int m,
                   int s,
                   int j)

Get the dG_ms^j / d_h coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dG_ms^j / d_h

getdGmsdAlpha

public T getdGmsdAlpha(int m,
                       int s,
                       int j)

Get the dG_ms^j / d_α coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dG_ms^j / d_α

getdGmsdBeta

public T getdGmsdBeta(int m,
                      int s,
                      int j)

Get the dG_ms^j / d_β coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dG_ms^j / d_β

getdHmsdk

public T getdHmsdk(int m,
                   int s,
                   int j)

Get the dH_ms^j / d_k coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dH_ms^j / d_k

getdHmsdh

public T getdHmsdh(int m,
                   int s,
                   int j)

Get the dH_ms^j / d_h coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dH_ms^j / d_h

getdHmsdAlpha

public T getdHmsdAlpha(int m,
                       int s,
                       int j)

Get the dH_ms^j / d_α coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dH_ms^j / d_α

getdHmsdBeta

public T getdHmsdBeta(int m,
                      int s,
                      int j)

Get the dH_ms^j / d_β coefficient.

Parameters:

m - m subscript

s - s subscript

j - order

Returns:

dH_ms^j / d_β