The first TMY collection was based on 229 locations in the US and was collected between 1948 and 1980. The second edition of the TMY is called "TMY2". It is based on 239 stations collecting data between 1961 and 1990.
The initial TMY collection was based on 229 locations in the US, spanning from 1948 to 1980. The second edition of the TMY is called "TMY2," and it encompasses 239 stations collecting data between 1961 and 1990.