Package org.orekit.propagation.semianalytical.dsst.utilities.hansen

Class HansenTesseralLinear

java.lang.Object
org.orekit.propagation.semianalytical.dsst.utilities.hansen.HansenTesseralLinear
public class HansenTesseralLinear extends Object
Hansen coefficients K(t,n,s) for t!=0 and n < 0.

Implements Collins 4-236 or Danielson 2.7.3-(9) for Hansen Coefficients and Collins 4-240 for derivatives. The recursions are transformed into composition of linear transformations to obtain the associated polynomials for coefficients and their derivatives - see Petre's paper

Author:
Petre Bazavan, Lucian Barbulescu

  • Constructor Summary

    Constructors
    Constructor
    Description
    HansenTesseralLinear(int nMax, int s, int j, int n0, int maxHansen)
    Constructor.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    computeInitValues(double e2, double chi, double chi2)
    Compute the values for the first four coefficients and their derivatives by means of series.
    double
    getDerivative(int mnm1, double chi)
    Compute the value of the derivative dKj-n-1, s / de².
    double
    getValue(int mnm1, double chi)
    Compute the value of the Hansen coefficient Kj-n-1, s.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • HansenTesseralLinear

      public HansenTesseralLinear(int nMax, int s, int j, int n0, int maxHansen)
      Constructor.
      Parameters:
      nMax - the maximum (absolute) value of n parameter
      s - s parameter
      j - j parameter
      n0 - the minimum (absolute) value of n
      maxHansen - maximum power of e2 in Hansen expansion

  • Method Details

    • computeInitValues

      public void computeInitValues(double e2, double chi, double chi2)
      Compute the values for the first four coefficients and their derivatives by means of series.
      Parameters:
      e2 - e²
      chi - Χ
      chi2 - Χ²

    • getValue

      public double getValue(int mnm1, double chi)
      Compute the value of the Hansen coefficient Kj-n-1, s.
      Parameters:
      mnm1 - -n-1
      chi - χ
      Returns:
      the coefficient Kj-n-1, s

    • getDerivative

      public double getDerivative(int mnm1, double chi)
      Compute the value of the derivative dKj-n-1, s / de².
      Parameters:
      mnm1 - -n-1
      chi - χ
      Returns:
      the derivative dKj-n-1, s / de²