IssLayer.java

// Shows International Space Station location as marker on map, for current time

{
MapPos issPos = predictISS(System.currentTimeMillis());
iss = new Marker(
        mapView.getComponents().layers.getBaseProjection().fromWgs84(issPos.x, issPos.y), 
        new DefaultLabel("ISS"), markerStyle, null);
markerLayer.add(iss);

}


private MapPos predictISS(long timeMillis){
 // requires: commons-lang-2.1.jar, joda-time-jar-1.6.jar and predict4java_1.1.158.4.jar from https://code.google.com/p/predict4java/downloads/list  

  // from http://celestrak.com/NORAD/elements/stations.txt
  String[] ISS_TLE = {
      "ISS (ZARYA)",
      "1 25544U 98067A   14126.92299264  .00007994  00000-0  14853-3 0  2319",
      "2 25544  51.6500 304.1061 0002752 337.8472 139.1065 15.49877967884923"};
  
  GroundStationPosition GROUND_STATION =
          new GroundStationPosition(0, 0, 0);
  
  final TLE tle = new TLE(ISS_TLE);

  final Satellite satellite = SatelliteFactory.createSatellite(tle);

  final SatPos satellitePosition = satellite.getPosition(GROUND_STATION, new Date(timeMillis));
  
  Log.info("ISS position :"+Math.toDegrees(satellitePosition.getLongitude())+", "+Math.toDegrees(satellitePosition.getLatitude())+ " Altitude: " + satellitePosition.getAltitude());
  
  // normalize x
  double x = Math.toDegrees(satellitePosition.getLongitude());
  if (x > 180){
      x -= 360;
  }
  
  return new MapPos(x,Math.toDegrees(satellitePosition.getLatitude()),satellitePosition.getAltitude());
}