Package org.orekit.gnss.antenna

Class TwoDVariation

java.lang.Object

org.orekit.gnss.antenna.TwoDVariation

All Implemented Interfaces:

PhaseCenterVariationFunction

public class TwoDVariation
extends Object
implements PhaseCenterVariationFunction

Interpolator for 2D phase center variation data.

Since:

9.2

Author:

Luc Maisonobe

Constructor Summary

Constructors

Constructor	Description
TwoDVariation(double polarStart, double polarStep, double azimuthStep, double[][] variations)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
double	value(double polarAngle, double azimuthAngle)	Evaluate phase center variation in one signal direction.

Methods inherited from class java.lang.Object

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

Constructor Details

TwoDVariation

public TwoDVariation(double polarStart,
 double polarStep,
 double azimuthStep,
 double[][] variations)

Simple constructor.

Parameters:

polarStart - start polar angle

polarStep - between grid points

azimuthStep - step between grid points

variations - sampled phase center variations

Method Details

value

public double value(double polarAngle,
 double azimuthAngle)

Evaluate phase center variation in one signal direction.

Specified by:

value in interface PhaseCenterVariationFunction

Parameters:

polarAngle - angle from antenna axial direction (zenith angle for receiver antennas, nadir angle for GNSS satellites antennas)

azimuthAngle - angle around axial direction, counted from +X to +Y (note that this convention is consistent with Vector3D.getAlpha(), but it is different from TrackingCoordinates.getAzimuth(), so care must be taken when using this for ground receivers)

Returns:

phase center variation in the signal direction (m)