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Map layers and data included

Annual average, monthly averages, 12 x 24 profiles

GHI Global horizontal irradiation kWh/m2 Average annual, monthly or daily sum of global horizontal irradiation.
DIF Diffuse horizontal irradiation kWh/m2 Average yearly, monthly or daily sum of diffuse horizontal irradiation.
DNI Direct normal irradiation kWh/m2 Average yearly, monthly or daily sum of direct normal irradiation.
GTI Global tilted irradiation kWh/m2 Average annual, monthly or daily sum of global horizontal irradiation.
TEMP Air temperature at 2 meters °C / °F Average yearly, monthly and daily air temperature at 2 m above ground.
PVOUT PV cSi yield kWh Yearly and monthly average values of photovoltaic electricity (AC) delivered by the total installed capacity of a PV system.

Annual average, monthly averages

WS Wind speed m/s at 10 m above ground m/s Average yearly, monthly and daily wind speed at 10 m above ground.
RH Relative humidity at 2m above ground % Average yearly or monthly relative humidity at 2 m above ground.
PWAT Precipitable water kg/m2 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 Average yearly and monthly sums of precipitation.
SNOWD Snow days days Snow days are calculated as days with snow water depth equivalent to or higher than 5 mm.
ALB Surface albedo   Fraction of solar irradiance reflected by surface. Ratio of upwelling to downwelling (GHI) radiative fluxes at the surface.
CDD Cooling degree days degree days Quantifies energy demand needed to cool a building. "Cooling degree days" are a measure of how much (in degrees), and for how long (in days), outside air temperature was higher than a specific base daily average temperature (18°C). Yearly and monthly values are aggregated from daily values.
HDD Heating degree days degree days Quantifies energy demand needed to heat a building. "Heating degree days" are a measure of how much (in degrees), and for how long (in days), outside air temperature was lower than a specific base daily average temperature (18°C). Yearly and monthly values are aggregated from daily values.

Additional map layers

ELE Elevation    
SLO Slope    
AZIM Azimuth    
POPUL Population density    
LANDC Land cover    
D2G Ratio of diffuse to global irradiation   Ratio of diffuse horizontal irradiation and global horizontal irradiation (DIF/GHI).
OPTA Optimum tilt of PV modules    
TLEO Lowest expected operating temperature °C / °F Mean of annual extreme low temperatures according to IEC 62738.

Other data

Horizon, Sunpath, Day lenght, Solar zenith angle

Spatial resolution

Map layers

Spatial resolution Data parameters

A9 arc-seconds, approx. 250m x 250m

30 arc-seconds, approx. 1 km x 1 km

2 arc-minutes, approx. 4 km x 4 km

3 arc-seconds, approx. 90m x 90m

GHI, DIF, DNI

PVOUT, GTI, TEMP, ALBEDO, HDD, CDD

WS, WD, RH, PWAT, PRECIP, SNOWD

Elevation, Slope, Azimuth

PV Calculation

Spatial resolution Data parameters

2 arc-minutes, approx. 4 km x 4km

30 arc-seconds, approx. 1 km x 1 km

9 arc-seconds, approx. 90m x 90m

GHI, DNI, PWAT, SNOW_DAYS

TEMP

PVOUT, Horizon

Geographical and temporal coverage

coverage map Prospect v202306

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 2022. 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 1994-2022 globally.Ground albedo data represents the long-term average for a period 2006-2015.