sunafterdark {INQC}

Maximum sunshine hours (only for "non-blended" ECA&D data)

Description

This function compares sunshine data to the maximum theoretical sunshine at an ECA&D station, according the day, lat and lon. Maximum sunshine hours are computed from the "suncalc" package, using "night" and "dawn" parameters. This contrasts quite a lot with other functions computing "daylength". This formulation is more conservative

Usage

sunafterdark(y, code = "991274")

Arguments

y

ECA&D style two columns with date (yyyymmdd) and values (expressed in 0.1 hours)

code

"numeric" part of the ECA&D SOUID, expressed as character, to avoid trouble with leading zeroes

Details

depends on either a previous execution of listas() or on a proper execution of listas() to run properly

Value

vector with the list of positions which do not pass this test. If all positions pass the test, returns NULL

See Also

listas()

Examples

#Set a temporal working directory:
wd <- tempdir(); wd0 <- setwd(wd)
#Extract the non-blended ECA&D data and a station file from the example data folder
path2sslist<-system.file("extdata", "ECA_blend_source_ss.txt", package = "INQC")
sslist<-readr::read_lines_raw(path2sslist)
readr::write_lines(sslist,'ECA_blend_source_ss.txt')
path2ssdata<-system.file("extdata", "SS_SOUID132728.txt", package = "INQC")
#Read the sunshine data
y<-readecad(input=path2ssdata,missing= -9999)[,3:4]
options("homefolder"='./'); options("blend"=FALSE)
listonator(check=TRUE)
#Call sunafterdark()
sunafterdark(y,code='132728')
#Introduce error values in the sunshine data
y[1:10,2]<-200
#Call sunafterdark()
sunafterdark(y,code='132728')
#Return to user's working directory:
setwd(wd0)