| SunObservation(IGeoLocatable) | Creates a new instance of SunObservation for today at the specified location for sunrise and sunset. |
| SunObservation(DateTimeOffset, IGeoLocatable) | Creates a new instance of SunObservation for the date and location specified for sunrise and sunset. |
| SunObservation(DateTimeOffset, IGeoLocatable, IdtTimeZone, Double) | Creates a new instance of SunObservation for the date and location specified using the given time zone for an arbitrary solar altitude. |