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Data parameters

Annual average, monthly averages, 12 x 24 profiles

GHI Global horizontal irradiation kWh/m2 Monthly and annual long-term averages of global horizontal irradiation.
DIF Diffuse horizontal irradiation kWh/m2 Monthly and annual long-term averages of diffuse horizontal irradiation.
DNI Direct normal irradiation kWh/m2 Monthly and annual long-term averages of direct normal irradiation.
GTI Global tilted irradiation kWh/m2 Monthly and annual long-term averages of global horizontal irradiation.
TEMP Air temperature at 2 meters °C / °F Monthly and annual long-term averages of air temperature at 2 m above ground.
PVOUT PV cSi yield kWh Monthly and yearly average values of photovoltaic electricity (AC) delivered by the total installed capacity of a PV system.
PR Performance ratio % Monthly and annual long-term averages of performance ratio.
WS Wind speed m/s at 10 m above ground m/s Monthly and annual long-term averages of wind speed at 10 m above ground.
RH Relative humidity at 2m above ground % Monthly and annual long-term averages of relative humidity at 2 m above ground.
PWAT Precipitable water kg/m2 Monthly and annual long-term averages of precipitable water. Precipitable water is the depth of water vapour in a column of the atmosphere, if all the water in that column were precipitated as rain. It indicates the amount of moisture above ground.
PREC Precipitation (rainfall) mm Monthly and annual long-term averages of precipitation.
ALB Surface albedo   Monthly and annual long-term averages of albedo. Fraction of solar irradiance reflected by surface. Ratio of upwelling to downwelling (GHI) radiative fluxes at the surface.


Additional parameters

ELE Elevation   Elevation above sea level
OPTA Optimum tilt of PV modules    
AZIM Azimuth    

Geographical and temporal coverage

coverage map Prospect v202409

 

Time representation of various parameters depends on the input sources and models behind them. With few exceptions, it spans from the 1990s/2000s to the last year. Depending on the region, the long-term averages are calculated for a period from 1994/1999/2005/2007/2018 to 2023. Please, refer to the map above for the specific start year.

The long-term averages of the other meteorological parameters are calculated for a period 1994-2023 globally. Ground albedo data represents the long-term average for a period 2006-2015.