Package org.orekit.forces.gravity.potential

Class EGMFormatReader

java.lang.Object

org.orekit.forces.gravity.potential.PotentialCoefficientsReader

org.orekit.forces.gravity.potential.EGMFormatReader

All Implemented Interfaces:

DataLoader

public class EGMFormatReader
extends PotentialCoefficientsReader

This reader is adapted to the EGM Format.

The proper way to use this class is to call the GravityFieldFactory which will determine which reader to use with the selected gravity field file.

Author:

Fabien Maussion

See Also:

GravityFieldFactory

Constructor Summary

Constructors

Constructor	Description
EGMFormatReader(String supportedNames, boolean missingCoefficientsAllowed)	Simple constructor.
EGMFormatReader(String supportedNames, boolean missingCoefficientsAllowed, boolean useWgs84Coefficients)	Simple constructor that allows overriding 'standard' EGM96 ae and mu with WGS84 variants.

Method Summary

Modifier and Type	Method	Description
RawSphericalHarmonicsProvider	getProvider(boolean wantNormalized, int degree, int order)	Get a provider for read spherical harmonics coefficients.
void	loadData(InputStream input, String name)	Load data from a stream.

Methods inherited from class java.lang.Object

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

Methods inherited from class org.orekit.forces.gravity.potential.PotentialCoefficientsReader

buildRow, buildTriangularArray, extendListOfLists, getAe, getConstantProvider, getMaxAvailableDegree, getMaxAvailableOrder, getMaxParseDegree, getMaxParseOrder, getMu, getSupportedNames, getTideSystem, missingCoefficientsAllowed, parseCoefficient, parseCoefficient, parseDouble, rescale, setAe, setMaxParseDegree, setMaxParseOrder, setMu, setRawCoefficients, setReadComplete, setTideSystem, stillAcceptsData, toArray

Constructor Detail

EGMFormatReader

public EGMFormatReader(String supportedNames,
                       boolean missingCoefficientsAllowed)

Simple constructor.

Parameters:

supportedNames - regular expression for supported files names

missingCoefficientsAllowed - if true, allows missing coefficients in the input data

EGMFormatReader

public EGMFormatReader(String supportedNames,
                       boolean missingCoefficientsAllowed,
                       boolean useWgs84Coefficients)

Simple constructor that allows overriding 'standard' EGM96 ae and mu with WGS84 variants.

Parameters:

supportedNames - regular expression for supported files names

missingCoefficientsAllowed - if true, allows missing coefficients in the input data

useWgs84Coefficients - if true, the WGS84 values will be used for equatorial radius and central attraction coefficient

Method Detail

loadData

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

Load data from a stream.

Specified by:

loadData in interface DataLoader

Specified by:

loadData in class PotentialCoefficientsReader

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

OrekitException - if some data is missing or if some loader specific error occurs

getProvider

public RawSphericalHarmonicsProvider getProvider(boolean wantNormalized,
                                                 int degree,
                                                 int order)
                                          throws OrekitException

Get a provider for read spherical harmonics coefficients.

EGM fields don't include time-dependent parts, so this method returns directly a constant provider.

Specified by:

getProvider in class PotentialCoefficientsReader

Parameters:

wantNormalized - if true, the provider will provide normalized coefficients, otherwise it will provide un-normalized coefficients

degree - maximal degree

order - maximal order

Returns:

a new provider

Throws:

OrekitException - if the requested maximal degree or order exceeds the available degree or order or if no gravity field has read yet

Since:

6.0

See Also:

PotentialCoefficientsReader.getConstantProvider(boolean, int, int)