The Cassini measured the microwave radiation emitted by Titan

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Cassini spacecraft castle operating in the Saturn system in 2013 radar measurements of a bare moon Titan is the second largest lake in the Ligeia castle Mare surface, which is probably due to the complete lack of wind.
Titan is the only solar system, which is similar to Earth's castle weather system, so the results of modeling with the early history of our planet can be very useful. The most recent of these results to the surface of the moon is the second largest lake (Ligeia Mare) is smooth. This is probably because it was a dead calm, at least when the Cassini spacecraft flew just next to the Titan.
The radar measurements made in 2013 involved a deeper insight into the giant moon weather conditions, but also provide information on the composition of its surface. Led by Howard Zebker (Stanford University) investigation revealed that the beaches around the lake is likely frozen solid organic materials and water are not available.
Saturn's castle largest moon, Titan the dense, planet-like atmosphere is, on the surface castle of the vast, consisting of methane and ethane lakes can be found. Of about 420 miles long and 350 miles wide Ligeia Mare is larger than the North American Lake Superior (Lake Superior). Zebker that the Titan is the best analogy to the Earth because it is the only planet in the solar system castle outside our planet, in which a complex system of solid, liquid and gaseous phases are formed. castle
Titan thick atmosphere prevents the Cassini produce a clear image of the surface in the visible range, so the researchers had to resort to the radar measurements instead of the optical cameras. castle Analysis of the reflected radar waves by the surface showed that the surface metántó extremely small wave.
Zebker the measurement lit up the essence of an example: imagine that the Earth, the sun is reflected in the waters castle of a lake. If the surface of the lake is very smooth, it behaves as an almost perfect mirror, which is produced by the sun is very bright image. However, if the water ripples, ripples of reflected light is scattered a lot of direction, so the picture will be more volatile and lighter. A similar thing happens in the case of Titan, the radar echoes as well.
Zebker according to the sensitivity of the Cassini radar measurement is given access to one millimeter accuracy enabled, castle so you can be the Ligeia Mare surface waves, castle their amplitude is less than 1 mm, that is extremely smooth surface of the lake. One possible explanation for the almost absolute calm lake that in the period when Cassini flew by the Titan, a moon of the regions of absolutely no wind. Another possibility is that the waves in a thin surface layer of material blocks. For example, if the oil layer of the Earth is water, much of the small waves out quickly.
The Cassini measured the microwave radiation emitted by Titan's surface coverings. The measurements on the basis of temperature and pressure which take into account analysis Zebker et al confirmed the previous results that the areas around Ligeia Mare solid organic substances, mainly methane and ethane forming the pond is available. According Zebker - like water on Earth - the Titan is methane castle in three phases, solid, liquid and gaseous phase to possibly exist.
Due to the similarity between the Earth and Titan may be a good model for the early evolution of the planet's past. The giant moon because the Earth is different in detail, but because of the global circulation of the existence of large-scale image is very similar. If we see the same two completely different environments, can facilitate the exploration of the evolution of planet-like bodies control the general principles and an explanation as to why the Earth has evolved and why does the Titan of life.