Acknowledgements The meteorological data used in this data set are provided by the National Climatic Data Center (NCDC) from its Integrated Surface Database (ISD). NREL gratefully acknowledges the countless hours of time and expertise that went into the creation and maintenance of the ISD. More ...
stations, the DDY2 files provide an alternate set of design conditions based on more recent data. If you find anything unusual in the TMY3A or TMY3, please let us know! Such a large data set makes it impossible to visually inspect all 90 million elements (8.935 million x 10 element...