org.orekit.propagation.semianalytical.dsst.utilities

## Class FieldGHmsjPolynomials<T extends RealFieldElement<T>>

• java.lang.Object
• org.orekit.propagation.semianalytical.dsst.utilities.FieldGHmsjPolynomials<T>

• ```public class FieldGHmsjPolynomials<T extends RealFieldElement<T>>
extends Object```
Compute the Gmsj and the Hmsj 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

All Methods
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 Gmsj and Hmsj 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 Gmsj coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
the Gmsj
• #### getHmsj

```public T getHmsj(int m,
int s,
int j)```
Get the Hmsj coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
the Hmsj
• #### getdGmsdk

```public T getdGmsdk(int m,
int s,
int j)```
Get the dGmsj / dk coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dGmsj / dk
• #### getdGmsdh

```public T getdGmsdh(int m,
int s,
int j)```
Get the dGmsj / dh coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dGmsj / dh
• #### getdGmsdAlpha

```public T getdGmsdAlpha(int m,
int s,
int j)```
Get the dGmsj / dα coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dGmsj / dα
• #### getdGmsdBeta

```public T getdGmsdBeta(int m,
int s,
int j)```
Get the dGmsj / dβ coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dGmsj / dβ
• #### getdHmsdk

```public T getdHmsdk(int m,
int s,
int j)```
Get the dHmsj / dk coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dHmsj / dk
• #### getdHmsdh

```public T getdHmsdh(int m,
int s,
int j)```
Get the dHmsj / dh coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dHmsj / dh
• #### getdHmsdAlpha

```public T getdHmsdAlpha(int m,
int s,
int j)```
Get the dHmsj / dα coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dHmsj / dα
• #### getdHmsdBeta

```public T getdHmsdBeta(int m,
int s,
int j)```
Get the dHmsj / dβ coefficient.
Parameters:
`m` - m subscript
`s` - s subscript
`j` - order
Returns:
dHmsj / dβ