UnnormalizedSphericalHarmonicsProvider (OREKIT 12.1.3 API)

All Superinterfaces:

SphericalHarmonicsProvider, TideSystemProvider
```
public interface UnnormalizedSphericalHarmonicsProvider
extends SphericalHarmonicsProvider
```
Interface used to provide un-normalized spherical harmonics coefficients.
Un-normalized spherical harmonics coefficients are fine for small degrees. At high degree and order the un-normalized coefficients are not representable in a double. NormalizedSphericalHarmonicsProvider is recommended for high precision applications.

Since:

6.0

Author:

Luc Maisonobe

See Also:

GravityFields

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`UnnormalizedSphericalHarmonicsProvider.UnnormalizedSphericalHarmonics`	Un-normalized spherical harmonics coefficients evaluated at a specific instant.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default double`	`getUnnormalizedC20(AbsoluteDate date)`	Get the un-normalized coefficient of degree 2 and order 0 at a specific instance in time.
`UnnormalizedSphericalHarmonicsProvider.UnnormalizedSphericalHarmonics`	`onDate(AbsoluteDate date)`	Get the un-normalized spherical harmonic coefficients at a specific instance in time.

Methods inherited from interface org.orekit.forces.gravity.potential.SphericalHarmonicsProvider
getAe, getMaxDegree, getMaxOrder, getMu, getReferenceDate

Methods inherited from interface org.orekit.forces.gravity.potential.TideSystemProvider
getTideSystem

- Method Detail
  - onDate
```
UnnormalizedSphericalHarmonicsProvider.UnnormalizedSphericalHarmonics onDate(AbsoluteDate date)
```
    Get the un-normalized spherical harmonic coefficients at a specific instance in time.
    
    Parameters:
    
    date - of evaluation (may be null if model is not time-dependent)
    
    Returns:
    
    un-normalized coefficients on date.
    
    Since:
    
    6.1
  - getUnnormalizedC20
```
default double getUnnormalizedC20(AbsoluteDate date)
```
    Get the un-normalized coefficient of degree 2 and order 0 at a specific instance in time.
    
    Parameters:
    
    date - of evaluation (may be null if model is not time-dependent)
    
    Returns:
    
    un-normalized C20 on date.
    
    Since:
    
    12.1