org.orekit.data

Class PolynomialParser

java.lang.Object

org.orekit.data.PolynomialParser

public class PolynomialParser
extends Object

Parser for polynomials in IERS tables.

IERS conventions tables display polynomial parts using several different formats, like the following ones:

• 125.04455501° − 6962890.5431″t + 7.4722″t² + 0.007702″t³ − 0.00005939″t⁴
• 0.02438175 × t + 0.00000538691 × t²
• 0''.014506 + 4612''.15739966t + 1''.39667721t^2 - 0''.00009344t^3 + 0''.00001882t^4
• -16616.99 + 2004191742.88 t - 427219.05 t^2 - 198620.54 t^3 - 46.05 t^4 + 5.98 t^5

This class parses all these formats and returns the coefficients.

Author:

Luc Maisonobe

See Also:

SeriesTerm, PoissonSeries, BodiesElements

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PolynomialParser.Unit Unit for the coefficients.

Constructor Summary

Constructors

Constructor and Description
PolynomialParser(char freeVariable, PolynomialParser.Unit defaultUnit) Simple constructor.

Method Summary

Modifier and Type	Method and Description
double[]	parse(String expression) Parse a polynomial expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

PolynomialParser

public PolynomialParser(char freeVariable,
                        PolynomialParser.Unit defaultUnit)

Simple constructor.

Parameters:

freeVariable - name of the free variable

defaultUnit - unit to use if no unit found while parsing

Method Detail

parse

public double[] parse(String expression)

Parse a polynomial expression.

Parameters:

expression - polynomial expression to parse

Returns:

polynomial coefficients array in increasing degree order, or null if expression is not a recognized polynomial