public class NavstarISGps200DPropagator extends CartesianOnePointPropagator
The interface specification that defines this propagation scheme can be found at the US Coast Guard Navigation Center website: NAVSTAR Global Positioning System.
| Modifier | Constructor and Description |
|---|---|
|
NavstarISGps200DPropagator(IGpsElements elementSet)
Constructor that takes a single GPS satellite element set.
|
protected |
NavstarISGps200DPropagator(NavstarISGps200DPropagator existingInstance,
CopyContext context)
Initializes a new instance as a copy of an existing instance.
|
| Modifier and Type | Method and Description |
|---|---|
protected boolean |
checkForSameDefinition(CartesianOnePointPropagator other)
Checks to determine if another instance has the same definition as this instance and
returns
true if it does. |
protected boolean |
checkForSameDefinition(NavstarISGps200DPropagator other)
Checks to determine if another instance has the same definition as this instance and
returns
true if it does. |
Object |
clone(CopyContext context)
Clones this object using the specified context.
|
protected int |
computeCurrentDefinitionHashCode()
Computes a hash code based on the current properties of this object.
|
void |
enumerateDependencies(DependencyEnumerator enumerator)
Enumerates the dependencies of this object by calling
DependencyEnumerator#enumerate(T) for each object that this object directly depends upon. |
MotionEvaluator1<Cartesian> |
getEvaluator(EvaluatorGroup group)
Gets an evaluator that can propagate at individual dates.
|
protected ReferenceFrame |
getMotionReferenceFrame()
Gets the reference frame in which the motion is defined.
|
ReferenceFrame |
getReferenceFrame()
Gets the Earth Fixed reference frame, which is the frame that the GPS satellite orbital positions
are referenced to.
|
checkForSameDefinition, createPoint, getEvaluator, propagate, propagateareSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, areSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, collectionItemsAreSameDefinition, dictionaryItemsAreSameDefinition, freeze, freezeAggregatedObjects, getCollectionHashCode, getCollectionHashCode, getCollectionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDefinitionHashCode, getDictionaryHashCode, getIsFrozen, isSameDefinition, throwIfFrozenpublic NavstarISGps200DPropagator(IGpsElements elementSet)
elementSet - GPS Satellite element setprotected NavstarISGps200DPropagator(@Nonnull NavstarISGps200DPropagator existingInstance, @Nonnull CopyContext context)
See ICloneWithContext.clone(CopyContext) for more information about how to implement this constructor
in a derived class.
existingInstance - The existing instance to copy.context - A CopyContext that controls the depth of the copy.ArgumentNullException - Thrown when existingInstance or context is null.public Object clone(CopyContext context)
This method should be implemented to call a copy constructor on the class of the
object being cloned. The copy constructor should take the CopyContext as a parameter
in addition to the existing instance to copy. The copy constructor should first call
CopyContext.addObjectMapping(T, T) to identify the newly constructed instance
as a copy of the existing instance. It should then copy all fields, using
CopyContext.updateReference(T) to copy any reference fields.
A typical implementation of ICloneWithContext:
public static class MyClass implements ICloneWithContext {
public MyClass(MyClass existingInstance, CopyContext context) {
context.addObjectMapping(existingInstance, this);
someReference = context.updateReference(existingInstance.someReference);
}
@Override
public final Object clone(CopyContext context) {
return new MyClass(this, context);
}
private Object someReference;
}
In general, all fields that are reference types should be copied with a call to
CopyContext.updateReference(T). There are a couple of exceptions:
If one of these exceptions applies, the CopyContext should be given an opportunity
to update the reference before the reference is copied explicitly. Use
CopyContext.updateReference(T) to update the reference. If CopyContext.updateReference(T) returns
the original object, indicating that the context does not have a replacement registered,
then copy the object manually by invoking a Clone method, a copy constructor, or by manually
constructing a new instance and copying the values.
alwaysCopy = context.updateReference(existingInstance.alwaysCopy);
if (existingInstance.alwaysCopy != null && alwaysCopy == existingInstance.alwaysCopy) {
alwaysCopy = (AlwaysCopy) existingInstance.alwaysCopy.clone(context);
}
If you are implementing an evaluator (a class that implements IEvaluator), the
IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) method shares some responsibilities with the
copy context constructor. Code duplication can be avoided by doing the following:
CopyContext.updateReference(T). You should still call CopyContext.updateReference(T) on any references to
non-evaluators.
IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as the last line in the constructor and pass it the
same CopyContext passed to the constructor.
IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) as normal. See the reference documentation for
IEvaluator.updateEvaluatorReferences(agi.foundation.infrastructure.CopyContext) for more information on implementing that method.
public MyClass(MyClass existingInstance, CopyContext context) {
super(existingInstance, context);
someReference = context.updateReference(existingInstance.someReference);
evaluatorReference = existingInstance.evaluatorReference;
updateEvaluatorReferences(context);
}
@Override
public void updateEvaluatorReferences(CopyContext context) {
evaluatorReference = context.updateReference(evaluatorReference);
}
@Override
public Object clone(CopyContext context) {
return new MyClass(this, context);
}
private Object someReference;
private IEvaluator evaluatorReference;clone in interface ICloneWithContextclone in class DefinitionalObjectcontext - The context to use to perform the copy.protected final boolean checkForSameDefinition(CartesianOnePointPropagator other)
true if it does. Derived classes MUST override this method and check
all new fields introduced by the derived class for definitional equivalence. It is NOT necessary
to check base class fields because the base class will already have done that. When overriding this method,
you should NOT call the base implementation because it will return false for all derived-class instances.
Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).checkForSameDefinition in class CartesianOnePointPropagatorother - The other instance to compare to this one.true if the two objects are defined equivalently; otherwise false.protected boolean checkForSameDefinition(NavstarISGps200DPropagator other)
true if it does. Derived classes MUST override this method and check
all new fields introduced by the derived class for definitional equivalence. It is NOT necessary
to check base class fields because the base class will already have done that. When overriding this method,
you should NOT call the base implementation because it will return false for all derived-class instances.
Derived classes should check the type of other to preserve the symmetric nature of IEquatableDefinition.isSameDefinition(java.lang.Object).other - The other instance to compare to this one.true if the two objects are defined equivalently; otherwise false.protected int computeCurrentDefinitionHashCode()
NavstarISGps200DPropagator.checkForSameDefinition(agi.foundation.propagators.CartesianOnePointPropagator) method.computeCurrentDefinitionHashCode in class CartesianOnePointPropagatorpublic void enumerateDependencies(DependencyEnumerator enumerator)
DependencyEnumerator#enumerate(T) for each object that this object directly depends upon.
Derived classes which contain additional dependencies MUST override this method, call the base
implementation, and enumerate dependencies introduced by the derived class.enumerateDependencies in interface IEnumerateDependenciesenumerateDependencies in class DefinitionalObjectenumerator - The enumerator that is informed of the dependencies of this object.public final ReferenceFrame getReferenceFrame()
The Earth Fixed frame is obtained from the FixedFrame (get / set) property
of the EarthCentralBody that is stored in the CentralBodiesFacet instance in
the CalculationContext.
protected ReferenceFrame getMotionReferenceFrame()
getMotionReferenceFrame in class CartesianOnePointPropagatorpublic MotionEvaluator1<Cartesian> getEvaluator(EvaluatorGroup group)
Gets an evaluator that can propagate at individual dates.
This evaluator propagates the orbit state from the given set of IGpsElements
based on the IS-GPS-200D standards.
The result of evaluating will be a
Motion<Cartesian> corresponding to the orbital
position and velocity at the given JulianDate expressed in the Earth Fixed ReferenceFrame (get) defined
by the propagator.
getEvaluator in class CartesianOnePointPropagatorgroup - The group with which to associate the new evaluator. By grouping evaluators
that are often evaluated at the same Julian dates, common computations can be performed only once
for the entire group instead of multiple times for each evaluator.ArgumentNullException - Thrown when the group is null.CartesianOnePointPropagator.createPoint()