public IList<AdvanticSignal> GetAdvanticSignal(String userId)
{
List<AdvanticSignal> advanticSignalList = new List<AdvanticSignal>();
LocationService locationService = new LocationService();
User user= new User(userId);
List<Location> locationList = locationService.GetLocationsByUser(user);
foreach (Location location in locationList)
advanticSignalList.AddRange(GetAdvanticSignal(user, location));
return advanticSignalList;
}