earthproj

Class RadarObjects

java.lang.Object

earthproj.RadarObjects

public class RadarObjects
extends java.lang.Object

This class contains all of the properties and behavior (methods) of a radar object - one which is stationary on the surface of the Earth and tracks a trajectory object.

Constructor Summary

Constructors

Constructor and Description
RadarObjects() The Polyline object is constructed and its properties are set.

Method Summary

Modifier and Type	Method and Description
void	activateRadarTracking() The purpose is to show the radar line from the base station to the target.
void	loadTrajectoryObject(TrajectoryObjects to) The purpose is to load the trajectory object which the radar object will track.
void	loadWorldWindModel(gov.nasa.worldwind.awt.WorldWindowGLCanvas wwd) The purpose is to: 1) access the Earth model, 2) add the Polyline object to the renderable layer and then add that to the Earth model, and 3) build the vector from the center of the Earth to the radar base station (using the Vec4 class).
void	setBaseCoord(double lat, double lon, double alt) The purpose is to set the radar object base coordinates.

Methods inherited from class java.lang.Object

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

Constructor Detail

RadarObjects

public RadarObjects()

The Polyline object is constructed and its properties are set. The ArrayList object is built which will hold the Position objects that contain location information of both the radar object and the trajectory object being tracked. Radar tracking limits - range and angle - are also set here.

Method Detail

activateRadarTracking

public void activateRadarTracking()

The purpose is to show the radar line from the base station to the target. This method is called by EarthView during the trajectory propagation process. Trajectory Vector: the vector from the center of the Earth to the coordinates of the trajectory object at a specific point in time. Radar Base Station Vector: the vector from the center of the Earth to the coordinates of the radar base station. Radar Range Vector: the vector from the radar base station to the coordinates of the trajectory object. The magnitude is the slant range of the trajectory object as seen by the radar. Radar Range Angle: the angle between the radar base station Earth surface normal vector and the radar slant range vector. For example, when this angle is 90 degrees, the radar range vector would be pointed along the local horizon.

setBaseCoord

public void setBaseCoord(double lat,
                         double lon,
                         double alt)

The purpose is to set the radar object base coordinates. This method is called from the driver during the setup process.

Parameters:

lat - The latitude coordinate of the radar object location.

lon - The longitude coordinate of the radar object location.

alt - The altitude coordinate of the radar object location.

loadWorldWindModel

public void loadWorldWindModel(gov.nasa.worldwind.awt.WorldWindowGLCanvas wwd)

The purpose is to: 1) access the Earth model, 2) add the Polyline object to the renderable layer and then add that to the Earth model, and 3) build the vector from the center of the Earth to the radar base station (using the Vec4 class).

Parameters:

wwd - The World Wind Earth model.

loadTrajectoryObject

public void loadTrajectoryObject(TrajectoryObjects to)

The purpose is to load the trajectory object which the radar object will track.

Parameters:

to - The trajectory object to be tracked.