Package org.orekit.estimation.measurements.gnss

Class AmbiguitySolver

java.lang.Object

org.orekit.estimation.measurements.gnss.AmbiguitySolver

public class AmbiguitySolver
extends Object

Class for solving integer ambiguity problems.

Since:

10.0

Author:

Luc Maisonobe

See Also:

• LambdaMethod

Constructor Summary

Constructors

Constructor	Description
AmbiguitySolver(List<ParameterDriver> ambiguityDrivers, IntegerLeastSquareSolver solver, AmbiguityAcceptance acceptance)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
List<ParameterDriver>	fixIntegerAmbiguities(int startIndex, List<ParameterDriver> measurementsParametersDrivers, RealMatrix covariance)	Fix integer ambiguities.
List<ParameterDriver>	getAllAmbiguityDrivers()	Get all the ambiguity parameters drivers.
protected List<ParameterDriver>	getFreeAmbiguityDrivers()	Get the ambiguity parameters drivers that have not been fixed yet.
protected int[]	getFreeAmbiguityIndirection(int startIndex, List<ParameterDriver> measurementsParametersDrivers)	Get ambiguity indirection array for ambiguity parameters drivers that have not been fixed yet.
void	unFixAmbiguity(ParameterDriver ambiguityDriver)	Un-fix an integer ambiguity (typically after a phase cycle slip).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AmbiguitySolver

public AmbiguitySolver(List<ParameterDriver> ambiguityDrivers,
 IntegerLeastSquareSolver solver,
 AmbiguityAcceptance acceptance)

Simple constructor.

Parameters:

ambiguityDrivers - drivers for ambiguity parameters

solver - solver for the underlying Integer Least Square problem

acceptance - acceptance test to use

See Also:

• LambdaMethod

Method Details

getAllAmbiguityDrivers

public List<ParameterDriver> getAllAmbiguityDrivers()

Get all the ambiguity parameters drivers.

Returns:

all ambiguity parameters drivers

getFreeAmbiguityDrivers

protected List<ParameterDriver> getFreeAmbiguityDrivers()

Get the ambiguity parameters drivers that have not been fixed yet.

Returns:

ambiguity parameters drivers that have not been fixed yet

getFreeAmbiguityIndirection

protected int[] getFreeAmbiguityIndirection(int startIndex,
 List<ParameterDriver> measurementsParametersDrivers)

Get ambiguity indirection array for ambiguity parameters drivers that have not been fixed yet.

Parameters:

startIndex - start index for measurements parameters in global covariance matrix

measurementsParametersDrivers - measurements parameters drivers in global covariance matrix order

Returns:

indirection array between full covariance matrix and ambiguity covariance matrix

unFixAmbiguity

public void unFixAmbiguity(ParameterDriver ambiguityDriver)

Un-fix an integer ambiguity (typically after a phase cycle slip).

Parameters:

ambiguityDriver - driver for the ambiguity to un-fix

fixIntegerAmbiguities

public List<ParameterDriver> fixIntegerAmbiguities(int startIndex,
 List<ParameterDriver> measurementsParametersDrivers,
 RealMatrix covariance)

Fix integer ambiguities.

Parameters:

startIndex - start index for measurements parameters in global covariance matrix

measurementsParametersDrivers - measurements parameters drivers in global covariance matrix order

covariance - global covariance matrix

Returns:

list of newly fixed ambiguities (ambiguities already fixed before the call are not counted)