Package org.orekit.estimation.measurements.filtering

Class SingleFrequencySmoother

java.lang.Object

org.orekit.estimation.measurements.filtering.SingleFrequencySmoother

public class SingleFrequencySmoother
extends Object

Handler to perform pseudo-range smoothing using single frequency measurements.

Since:

11.2

Author:

Louis Aucouturier

Constructor Summary

Constructors

Constructor	Description
SingleFrequencySmoother(MeasurementType type, double threshold, int N, double integrationTime)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
ObservationData	copyObservationData(ObservationData obsData)	Copy an ObservationData object.
SingleFrequencyHatchFilter	createFilter(ObservationData codeData, ObservationData smoothingData, SatelliteSystem system)	Creates an Hatch filter given initial data.
void	filterDataSet(List<ObservationDataSet> listODS, SatelliteSystem satSystem, int prnNumber, ObservationType obsType)	Applies a Single Frequency Hatch filter to a list of ObservationDataSet.
Map<ObservationType,List<SmoothedObservationDataSet>>	getFilteredDataMap()	Get the map of the filtered data.
Map<ObservationType,SingleFrequencyHatchFilter>	getMapFilters()	Get the map storing the filters for each observation type.

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleFrequencySmoother

public SingleFrequencySmoother(MeasurementType type,
                               double threshold,
                               int N,
                               double integrationTime)

Simple constructor.

Parameters:

type - type of the smoothing measurements

threshold - threshold for loss of lock detection (represents the maximum difference between smoothed and measured values for loss of lock detection)

N - window size of the Hatch Filter

integrationTime - time interval between two measurements (s)

Method Detail

createFilter

public SingleFrequencyHatchFilter createFilter(ObservationData codeData,
                                               ObservationData smoothingData,
                                               SatelliteSystem system)

Creates an Hatch filter given initial data.

Parameters:

codeData - input code observation data

smoothingData - input smoothing observation data

system - satellite system corresponding to the observations

Returns:

an Hatch filter for the input data

getFilteredDataMap

public Map<ObservationType,List<SmoothedObservationDataSet>> getFilteredDataMap()

Get the map of the filtered data.

Returns:

a map containing the filtered data.

getMapFilters

public final Map<ObservationType,SingleFrequencyHatchFilter> getMapFilters()

Get the map storing the filters for each observation type.

Returns:

the map storing the filters for each observation type

copyObservationData

public ObservationData copyObservationData(ObservationData obsData)

Copy an ObservationData object.

Parameters:

obsData - observation data to copy

Returns:

a copy of the input observation data

filterDataSet

public void filterDataSet(List<ObservationDataSet> listODS,
                          SatelliteSystem satSystem,
                          int prnNumber,
                          ObservationType obsType)

Applies a Single Frequency Hatch filter to a list of ObservationDataSet.

Parameters:

listODS - input observation data sets

satSystem - satellite System from which to filter the pseudo-range values

prnNumber - PRN identifier to identify the satellite from which to filter the pseudo-range values

obsType - observation type to use for filtering