org.jeospace.projection
Class ProjectionUtils

java.lang.Object
  org.jeospace.projection.ProjectionUtils

public abstract class ProjectionUtils

extends java.lang.Object

Utility methods for calculating data sets used to create geometry with a simulation visual.

Version:

$Revision: 1.1.1.1 $

Author:

Rex Melton

Constructor Summary

ProjectionUtils()

Method Summary

static Ellipsoidal[]	getEllipsoidalCoordinates(Satellite sat, double initialJulianDay, int number_of_revs, int number_of_coords_per_rev) Calculate the Earth Ellipsoidal coordinates that coorespond to the orbital path of a satellite.
static Ellipsoidal[]	getFootprintBoundary(Ellipsoidal gdc, Angle radiusAngle, int number_of_points) Calculate the Ellipsoidal coordinates that coorespond to the conical footprint on the surface of an ellipsoid.
static Ellipsoidal[]	getFootprintBoundary(Satellite sat, double julianDay, int number_of_points) Calculate the Earth Ellipsoidal coordinates that coorespond to the footprint of a satellite.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectionUtils

public ProjectionUtils()

Method Detail

getEllipsoidalCoordinates

public static Ellipsoidal[] getEllipsoidalCoordinates(Satellite sat,
                                                      double initialJulianDay,
                                                      int number_of_revs,
                                                      int number_of_coords_per_rev)

Calculate the Earth Ellipsoidal coordinates that coorespond to the orbital path of a satellite.

Note: This is Earth specific !

Parameters:

sat - The satellite object to calculate the path for.

initialJulianDay - The initial time to begin the calculations

number_of_revs - The number of revolutions to calculate

number_of_coords_per_rev - The number of coordinates to calculate for each revolution.

getFootprintBoundary

public static Ellipsoidal[] getFootprintBoundary(Satellite sat,
                                                 double julianDay,
                                                 int number_of_points)

Calculate the Earth Ellipsoidal coordinates that coorespond to the footprint of a satellite.

Note: This is Earth specific !

Parameters:

sat - The satellite object to calculate the footprint for.

julianDay - The time for which to calculate the footprint.

number_of_points - The number of coordinates to calculate.

getFootprintBoundary

public static Ellipsoidal[] getFootprintBoundary(Ellipsoidal gdc,
                                                 Angle radiusAngle,
                                                 int number_of_points)

Calculate the Ellipsoidal coordinates that coorespond to the conical footprint on the surface of an ellipsoid. The resulting array will define a closed area with the initial and final coordinates being equal.

Parameters:

gdc - The ellipsoidal coordinate about which to calculate the footprint.

radiusAngle - The angular distance from the ellipsoidal coordinate that defines the boundary of the footprint.

number_of_points - The number of coordinates to calculate.