get_monthly_radiations: Create the SamsaraLight

In SamsaRaLight: Simulate Tree Light Transmission Using Ray-Tracing

Create the SamsaraLight

Description

Fetch monthly radiation data from PVGIS website (by API) between start and end year (limit years are from 2005 to 2020). Fetched variables are Hrad = horizontal plane irradiation and DGratio = ratio of diffuse to global radiation (in horizontal plane).

! YOU NEED AN INTERNET CONNECTION TO ACCESS THE DATA BY API !

Usage

get_monthly_radiations(latitude, longitude, start_year = 2005, end_year = 2020)

Arguments

latitude	latitude of the plot
longitude	longitude of the plot
start_year	positive integer between 2005 and 2020 - start year on which to fetch monthly data
end_year	positive integer between 2005 and 2020 - end year on which to fetch monthly data

Value

Monthly horizontal radiation (Hrad) and diffuse to global ratio (DGratio) averaged between start_year and end_year

Source

https://joint-research-centre.ec.europa.eu/pvgis-photovoltaic-geographical-information-system_en

Examples

# Example: fetch monthly radiation somewhere in Belgium
rad <- get_monthly_radiations(
  latitude = 50.85,
  longitude = 4.35,
  start_year = 2010,
  end_year = 2015
)

head(rad)

SamsaRaLight documentation built on April 16, 2026, 5:08 p.m.