Nice day yesterday in Milan, with blue sky and visible for many trails throughout the day and at night, illuminated from the Moon.
We see today's post in the usual analysis of weather data of the day and some photos of the aircraft wake yesterday passed over Milan in the late afternoon.
I initially prepared a diagram of Appleman ( link to the chart, data 12Z hours) where you can see immediately that the temperatures at typical flight altitudes were very low, with a peak of -63.3 ° C . We could therefore expect contrails least from the 10,410 m. For a more accurate prediction, I used the software Contrails Forecasting Calculator with correction of relative humidity values \u200b\u200bin the algorithm Miloshevich ( an explanation here). The software has already trails by 9421 m (although at this level the difference between criticism and T RT is small) and persistence between 10,410 and 11,769 m (correction Miloshevich here and here graph Relative humidity / temperature).
Let's look at the photographs. For each aircraft I photographed enclosed its path Flightradar24.com (courtesy of Flightradar24.com ). When can I photographed the plane first and then a wide field with a Newtonian telescope.
British Airways Airbus A320 G- EUUR
Lufhtansa Airbus A321 D- AIRN
Lufthansa Airbus A320 D- AIQF
airberlin (Belair) Airbus A320 HB-IOW
Air France Airbus A320 F- GFKV
Ryanair Boeing B737-800 EI-DAI
Swissair Airbus A320 HB-IJN
Finally, the star of the evening becomes the moon, obscured by the trails in this photo.
Tuesday, October 19 have been observed so many persistent contrails in the sky of Milan, provided an analysis of weather data, after correction Miloshevich. Between 17:00 and about 18:30 I photographed many trails to follow aircraft in flight at high altitude: all normal airliners.
The reality that emerges from this analysis, as many others made in recent months, we see that contrails in the sky are a consequence del normale traffico aereo ad alta quota, costituito fondamentalmente da aerei di linea.
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