public Tracker SetTracker(string name, float horizontalAngle, float verticalAngle)
 {
     Tracker t = new Tracker(name, horizontalAngle, verticalAngle);
     trackers[name] = t;
     return t;
 }
 public Tracker CreateTracker(string name)
 {
     Tracker t = new Tracker(name);
     trackers[name] = t;
     return t;
 }