TrackerThread(SubarrayControlImpl &saCI, monitor::CarmaMonitorSystem &carmaMonitor, const unsigned long period=TRACKER_DEFAULT_UPDATE_INTERVAL, const unsigned long antennaWeatherPeriod=TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL, const unsigned long delayEngineWeatherPeriod=TRACKER_DEFAULT_WEATHER_UPDATE_INTERVAL, const unsigned long antennaTrackPeriod=TRACKER_DEFAULT_ANTENNA_TRACK_UPDATE_INTERVAL)