private Configuration()
 {
     DeclinationAngle  = new DeclinationAngleCooper();
     AirMass           = new AirMassSimpleModel();
     DateTimeConverter = new DateTimeSolarTime();
     SunsetHourAngle   = new SunsetHourAngleAtmosphericRefraction();
 }
 public void SetSunsetHourAngle(SunsetHourAngleModels model)
 => SunsetHourAngle = SunsetHourAngleFactory.GetSunsetHourAngleModel(model);