org.orekit.models.earth.atmosphere.data

Class CssiSpaceWeatherData

java.lang.Object

org.orekit.data.AbstractSelfFeedingLoader

org.orekit.models.earth.atmosphere.data.CssiSpaceWeatherData

All Implemented Interfaces:

Serializable, DTM2000InputParameters, NRLMSISE00InputParameters

public class CssiSpaceWeatherData
extends AbstractSelfFeedingLoader
implements DTM2000InputParameters, NRLMSISE00InputParameters

This class provides three-hourly and daily solar activity data needed by atmospheric models: F107 solar flux, Ap and Kp indexes. The DataLoader implementation and the parsing is handled by the class CssiSpaceWeatherDataLoader.

The data are retrieved through space weather files offered by CSSI/AGI. The data can be retrieved on the AGI FTP. This file is updated several times a day by using several sources mentioned in the Celestrak space weather data documentation.

Since:

10.2

Author:

Clément Jonglez

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CssiSpaceWeatherData(String fileName) Simple constructor.
CssiSpaceWeatherData(String fileName, DataProvidersManager dataProvidersManager, TimeScale utc) Constructor that allows specifying the source of the CSSI space weather file.

Method Summary

Modifier and Type	Method and Description
double	get24HoursKp(AbsoluteDate date) Get the last 24H mean geomagnetic index.
double[]	getAp(AbsoluteDate date) Get the Ap geomagnetic indices.
double	getAverageFlux(AbsoluteDate date) Get the value of the 81 day average of F10.7 solar flux centered on current day.
double	getDailyFlux(AbsoluteDate date) Get the value of the daily F10.7 solar flux for previous day.
double	getInstantFlux(AbsoluteDate date) Get the value of the instantaneous solar flux.
AbsoluteDate	getMaxDate() Gets the available data range maximum date.
double	getMeanFlux(AbsoluteDate date) Get the value of the mean solar flux.
AbsoluteDate	getMinDate() Gets the available data range minimum date.
String	getSupportedNames() Get the supported names regular expression.
double	getThreeHourlyKP(AbsoluteDate date) Get the value of the 3 hours geomagnetic index.

Methods inherited from class org.orekit.data.AbstractSelfFeedingLoader

feed, getDataProvidersManager, setSupportedNames

Methods inherited from class java.lang.Object

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

Constructor Detail

CssiSpaceWeatherData

@DefaultDataContext
public CssiSpaceWeatherData(String fileName)

Simple constructor. This constructor uses the default data context.

Parameters:

fileName - name of the CSSI space weather file.

CssiSpaceWeatherData

public CssiSpaceWeatherData(String fileName,
                            DataProvidersManager dataProvidersManager,
                            TimeScale utc)

Constructor that allows specifying the source of the CSSI space weather file.

Parameters:

fileName - name of the CSSI space weather file.

dataProvidersManager - provides access to auxiliary data files.

utc - UTC time scale.

Method Detail

getMinDate

public AbsoluteDate getMinDate()

Gets the available data range minimum date.

Specified by:

getMinDate in interface DTM2000InputParameters

Specified by:

getMinDate in interface NRLMSISE00InputParameters

Returns:

the minimum date.

getMaxDate

public AbsoluteDate getMaxDate()

Gets the available data range maximum date.

Specified by:

getMaxDate in interface DTM2000InputParameters

Specified by:

getMaxDate in interface NRLMSISE00InputParameters

Returns:

the maximum date.

getInstantFlux

public double getInstantFlux(AbsoluteDate date)

Get the value of the instantaneous solar flux.

Specified by:

getInstantFlux in interface DTM2000InputParameters

Parameters:

date - the current date

Returns:

the instantaneous solar flux

getMeanFlux

public double getMeanFlux(AbsoluteDate date)

Get the value of the mean solar flux. FIXME not sure if the mean flux for DTM2000 should be computed differently than the average flux for NRLMSISE00

Specified by:

getMeanFlux in interface DTM2000InputParameters

Parameters:

date - the current date

Returns:

the mean solar flux

getThreeHourlyKP

public double getThreeHourlyKP(AbsoluteDate date)

Get the value of the 3 hours geomagnetic index. With a delay of 3 hours at pole to 6 hours at equator using: delay=6-abs(lat)*0.033 (lat in deg.)

Specified by:

getThreeHourlyKP in interface DTM2000InputParameters

Parameters:

date - the current date

Returns:

the 3H geomagnetic index

get24HoursKp

public double get24HoursKp(AbsoluteDate date)

Get the last 24H mean geomagnetic index.

Specified by:

get24HoursKp in interface DTM2000InputParameters

Parameters:

date - the current date

Returns:

the 24H geomagnetic index

getDailyFlux

public double getDailyFlux(AbsoluteDate date)

Get the value of the daily F10.7 solar flux for previous day.

Specified by:

getDailyFlux in interface NRLMSISE00InputParameters

Parameters:

date - the current date

Returns:

the daily F10.7 flux for previous day

getAverageFlux

public double getAverageFlux(AbsoluteDate date)

Get the value of the 81 day average of F10.7 solar flux centered on current day.

Specified by:

getAverageFlux in interface NRLMSISE00InputParameters

Parameters:

date - the current date

Returns:

the 81 day average of F10.7 solar flux centered on current day

getAp

public double[] getAp(AbsoluteDate date)

Get the A_p geomagnetic indices.

A_p indices are provided as an array such as:

• 0 → daily A_p
• 1 → 3 hr A_p index for current time
• 2 → 3 hr A_p index for 3 hrs before current time
• 3 → 3 hr A_p index for 6 hrs before current time
• 4 → 3 hr A_p index for 9 hrs before current time
• 5 → Average of eight 3 hr A_p indices from 12 to 33 hrs prior to current time
• 6 → Average of eight 3 hr A_p indices from 36 to 57 hrs prior to current time

Specified by:

getAp in interface NRLMSISE00InputParameters

Parameters:

date - the current date

Returns:

the array of A_p indices

getSupportedNames

public String getSupportedNames()

Description copied from class: AbstractSelfFeedingLoader

Get the supported names regular expression.

Overrides:

getSupportedNames in class AbstractSelfFeedingLoader

Returns:

the supported names.

See Also:

DataProvidersManager.feed(String, DataLoader)