org.orekit.models.earth.atmosphere.data

Class DtcDataLoader

java.lang.Object

org.orekit.models.earth.atmosphere.data.DtcDataLoader

All Implemented Interfaces:

DataLoader

public class DtcDataLoader
extends Object
implements DataLoader

This class reads solar activity data from DTCFILE files for the class JB2008SpaceEnvironmentData. The code in this class is based of the CssiSpaceWeatherDataLoader class. The DTCFILE file contain pre-computed data from Space Environment using the Dst indices as well as Ap indices. This computation can be realised using the Fortran code provided by Space Environment Technologies. See this link for more information.

The data is provided by Space Environment Technologies through their website Link.

The work done for this class is based on the CssiSpaceWeatherDataLoader class by Clément Jonglez, the JB2008 interface by Pascal Parraud, and corrections for DataLoader implementation by Bryan Cazabonne and Evan Ward .

Since:

11.2

Author:

Louis Aucouturier

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DtcDataLoader.LineParameters Container class for Solar activity indexes.

Constructor Summary

Constructors

Constructor and Description
DtcDataLoader(TimeScale utc) Constructor.

Method Summary

Modifier and Type	Method and Description
SortedSet<DtcDataLoader.LineParameters>	getDataSet() Getter for the data set.
AbsoluteDate	getMaxDate() Gets the available data range maximum date.
AbsoluteDate	getMinDate() Gets the available data range minimum date.
void	loadData(InputStream input, String name) Load data from a stream.
boolean	stillAcceptsData() Check if the loader still accepts new data.

Methods inherited from class java.lang.Object

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

Constructor Detail

DtcDataLoader

public DtcDataLoader(TimeScale utc)

Constructor.

Parameters:

utc - UTC time scale

Method Detail

getDataSet

public SortedSet<DtcDataLoader.LineParameters> getDataSet()

Getter for the data set.

Returns:

the data set

getMinDate

public AbsoluteDate getMinDate()

Gets the available data range minimum date.

Returns:

the minimum date.

getMaxDate

public AbsoluteDate getMaxDate()

Gets the available data range maximum date.

Returns:

the maximum date.

loadData

public void loadData(InputStream input,
                     String name)
              throws IOException,
                     ParseException,
                     OrekitException

Load data from a stream.

Specified by:

loadData in interface DataLoader

Parameters:

input - data input stream

name - name of the file (or zip entry)

Throws:

IOException - if data can't be read

ParseException - if data can't be parsed or if some loader specific error occurs

OrekitException

stillAcceptsData

public boolean stillAcceptsData()

Check if the loader still accepts new data.

This method is used to speed up data loading by interrupting crawling the data sets as soon as a loader has found the data it was waiting for. For loaders that can merge data from any number of sources (for example JPL ephemerides or Earth Orientation Parameters that are split among several files), this method should always return true to make sure no data is left over.

Specified by:

stillAcceptsData in interface DataLoader

Returns:

true while the loader still accepts new data