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AIR releases US temperature database
AIRWeather, a division of Boston-based natural hazard modelling company AIR Worldwide Corporation, yesterday released PerfecTemp Hourly, claiming that it is the first cleaned and reconstructed hourly station temperature database for the US. PerfecTemp Hourly, designed for energy company risk management, incorporates data from all primary US weather stations and provides hourly temperature data dating back to 1977.
AIRWeather developed PerfecTemp to improve data quality to fill a large void in the industry. Common problems with raw data include erroneous values, data gaps, station shifts, instrument changes and environmental effects, all of which adversely affect the quality of data.
To address these problems, AIRWeather developed new data cleaning methodologies based on the original research of its meteorological team. The cleaning process involves identifying data gaps and erroneous values and replacing these with estimates. After the data are cleaned, the reconstruction process corrects for time series shifts and trends that are the result of non-weather-related factors, such as station moves, instrument changes and other environmental changes. All cleaned and reconstructed data is then tested to ensure accuracy and quality.
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