in regards to PHL:
Here is the map of the data sources used for the MET at PHL, of which, there is but a single MET location for wind measurement...how the estimate the winds at each end is generated, well...
EDIT:
I believe many major airports globally, are using far more sophisticated AWS than those which utilise cup anemometers. I think you'll find that Dubai, and many FAA Major airports use more modern measuring equipment. See the internet links in my previous posts.
Your link was a Vaisala WM30, a cup anemometer. I believe you will find that most still use the cup anemometer system. While the FAA wanted replacement back in 2010, I think you will find most have not.
Bloggs..I stand corrected on YMML
They have added a second anemometer north of RW9/27 How these gives one TCH info is a bit of a stretch..
MLW1 and MLW2 shown
