protected static class AbstractGaussianContribution.FieldGaussianShortPeriodicCoefficients<T extends CalculusFieldElement<T>> extends Object implements FieldShortPeriodTerms<T>
The value of M is 0. Also, since the values of the Fourier coefficient Dim is 0 then the values of the coefficients Dim for m > 2 are also 0.
Modifier and Type | Method and Description |
---|---|
AbstractGaussianContribution.FieldSlot<T> |
createSlot(FieldSpacecraftState<T>... meanStates)
Get the slot valid for some date.
|
Map<String,T[]> |
getCoefficients(FieldAbsoluteDate<T> date,
Set<String> selected)
Computes the coefficients involved in the contributions.
|
String |
getCoefficientsKeyPrefix()
Get the prefix for short period coefficients keys.
|
T[] |
value(FieldOrbit<T> meanOrbit)
Evaluate the contributions of the short period terms.
|
public AbstractGaussianContribution.FieldSlot<T> createSlot(FieldSpacecraftState<T>... meanStates)
meanStates
- mean states defining the slotpublic T[] value(FieldOrbit<T> meanOrbit)
value
in interface FieldShortPeriodTerms<T extends CalculusFieldElement<T>>
meanOrbit
- mean orbit to which the short period contribution appliespublic String getCoefficientsKeyPrefix()
This prefix is used to identify the coefficients of the
current force model from the coefficients pertaining to
other force models. All the keys in the map returned by
FieldShortPeriodTerms.getCoefficients(FieldAbsoluteDate, Set)
start with this prefix, which must be unique among all
providers.
getCoefficientsKeyPrefix
in interface FieldShortPeriodTerms<T extends CalculusFieldElement<T>>
FieldShortPeriodTerms.getCoefficients(FieldAbsoluteDate, Set)
public Map<String,T[]> getCoefficients(FieldAbsoluteDate<T> date, Set<String> selected)
This method is intended mainly for validation purposes. Its output is highly dependent on the implementation details in each force model and may change from version to version. It is not recommended to use it for any operational purposes.
For Gaussian forces, there are JMAX cj coefficients, JMAX sj coefficients and 3 dj coefficients. As JMAX = 12, this sums up to 27 coefficients. The j index is the integer multiplier for the true longitude argument in the cj and sj coefficients and to the degree in the polynomial dj coefficients.
getCoefficients
in interface FieldShortPeriodTerms<T extends CalculusFieldElement<T>>
date
- current dateselected
- set of coefficients that should be put in the map
(empty set means all coefficients are selected)FieldShortPeriodTerms.getCoefficientsKeyPrefix()
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