![]() ![]() These data sets, such as NREL’s NSRDB, are generally fully populated with missing or modelled data flagged as such. Records consist of hourly measurements or modelled values of typical climatic parameters such as temperature, dew point, direct and diffuse solar radiation (beam and diffuse), and wind speed. Weather years for energy calculations are derived from such archives.Īrchival weather data of the type commonly available from local meteorological services generally comprise of hourly records spanning multiple years. Hourly weather observations, such as those from the NSRDB, represent continuous sequences of measured (or modeled) archived data over a period of record that may contain missing elements. Entries flagged as missing are interpolated. These single year files do not represent a single year of contiguous measured data but rather are composite years comprising months from different years, selected using statistical criteria (usually the F-S statistic), and modified at the end and beginning of the months to ensure a smooth transition between the non-sequential data. ![]() The files are complete with no entries flagged as missing. Weather years for energy calculations, such as IWEC, WYEC2, CWEC, TRY_ROW (see Abbreviations), TMY, TMY2, and TMY3 are single years for specific locations comprising of 8760 hourly records of various climatic parameters such as temperature, atmospheric moisture, and insolation. ![]()
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