DSSTForceModel
public class DSSTZonal extends Object implements DSSTForceModel
Constructor | Description |
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DSSTZonal(UnnormalizedSphericalHarmonicsProvider provider,
int maxDegreeShortPeriodics,
int maxEccPowShortPeriodics,
int maxFrequencyShortPeriodics) |
Simple constructor.
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Modifier and Type | Method | Description |
---|---|---|
EventDetector[] |
getEventsDetectors() |
Get the discrete events related to the model.
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double[] |
getMeanElementRate(SpacecraftState spacecraftState) |
Computes the mean equinoctial elements rates dai / dt.
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UnnormalizedSphericalHarmonicsProvider |
getProvider() |
Get the spherical harmonics provider.
|
List<ShortPeriodTerms> |
initialize(AuxiliaryElements aux,
boolean meanOnly) |
Performs initialization prior to propagation for the current force model.
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void |
initializeStep(AuxiliaryElements aux) |
Performs initialization at each integration step for the current force model.
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void |
registerAttitudeProvider(AttitudeProvider attitudeProvider) |
Register an attitude provider.
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void |
updateShortPeriodTerms(SpacecraftState... meanStates) |
Update the short period terms.
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public DSSTZonal(UnnormalizedSphericalHarmonicsProvider provider, int maxDegreeShortPeriodics, int maxEccPowShortPeriodics, int maxFrequencyShortPeriodics)
provider
- provider for spherical harmonicsmaxDegreeShortPeriodics
- maximum degree to consider for short periodics zonal harmonics potential
(must be between 2 and provider.getMaxDegree()
)maxEccPowShortPeriodics
- maximum power of the eccentricity to be used in short periodic computations
(must be between 0 and maxDegreeShortPeriodics - 1
, but should typically not exceed 4 as higher
values will exceed computer capacity)maxFrequencyShortPeriodics
- maximum frequency in true longitude for short periodic computations
(must be between 1 and 2 * maxDegreeShortPeriodics + 1
)public UnnormalizedSphericalHarmonicsProvider getProvider()
public List<ShortPeriodTerms> initialize(AuxiliaryElements aux, boolean meanOnly)
This method aims at being called at the very beginning of a propagation.
Computes the highest power of the eccentricity to appear in the truncated analytical power series expansion.
This method computes the upper value for the central body potential and determines the maximal power for the eccentricity producing potential terms bigger than a defined tolerance.
initialize
in interface DSSTForceModel
aux
- auxiliary elements related to the current orbitmeanOnly
- only mean elements are used during the propagationpublic void initializeStep(AuxiliaryElements aux)
This method aims at being called before mean elements rates computation.
initializeStep
in interface DSSTForceModel
aux
- auxiliary elements related to the current orbitpublic double[] getMeanElementRate(SpacecraftState spacecraftState)
getMeanElementRate
in interface DSSTForceModel
spacecraftState
- current state information: date, kinematics, attitudepublic EventDetector[] getEventsDetectors()
getEventsDetectors
in interface DSSTForceModel
public void registerAttitudeProvider(AttitudeProvider attitudeProvider)
Register an attitude provider that can be used by the force model.
registerAttitudeProvider
in interface DSSTForceModel
attitudeProvider
- the AttitudeProvider
public void updateShortPeriodTerms(SpacecraftState... meanStates)
The short period terms
that will be updated
are the ones that were returned during the call to DSSTForceModel.initialize(AuxiliaryElements, boolean)
.
updateShortPeriodTerms
in interface DSSTForceModel
meanStates
- mean states information: date, kinematics, attitudeCopyright © 2002-2019 CS Systèmes d'information. All rights reserved.