File:Tulilahti Finland illumination night 27 28 07 1959 1.svg

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Captions

Captions

Illumination at Tulilahti, Finland, night 27-20 July 1959, minimum nautical twilight

Summary

[edit]
Description
English: Illumination at Tulilahti, Finland. Double murder site, approximated murder and caching time. Night 27-20 July 1959, was clear and not very dark, minimum illumination was nautical twilight.
Date
Source Own work
Author Merikanto

"R" code with plot and "moonlit" package

    1. illumination at Tulilahti, Heinävesi, Finland
  2. famous double murder site and time, night 27-18.1959
    1. times UTC, not local time
  3. "R" code
    1. uses "moonlit" package
  5. 13.8.2023 0000.0002
  1. install and load devtools
  2. install.packages("devtools")
  3. library(devtools)
  1. install moonlit library from github repo
  2. install_github("msmielak/moonlit")
  1. https://cran.r-project.org/web/packages/suncalc/suncalc.pdf
  2. in POSIXct
  1. load the moonlit library

library(moonlit)

library(suncalc)

library(ggplot2)

library(lubridate)

    1. heinävesi tulilahden murha

paikka1="Tulilahti, Heinävesi"

lon1=28.630556 lat1=62.426389 date1="1959-07-27" date2="1959-07-28" datetime1="1959-07-27 21:59:59" timezone1="UTC"

  1. timezone1="Europe/Helsinki"

e1=0.26 t1="1 mins"

  1. "1959-7-27 20:00"
  2. "1959-7-28 2:00"


datetimes2<-seq(as.POSIXct("1959-7-27 18:00", tz = "UTC"), 

as.POSIXct("1959-7-28 2:00", tz = "UTC"), by = "min")


  1. print(datetimes2)


  1. stop(-1)



  1. print("Sun " )

sunpos1<-getSunlightPosition(date = as.POSIXct(datetimes2, tz = "UTC"), lat = lat1, lon = lon1)

  1. print("Moon " )

moonpos1<-getMoonPosition(date = as.POSIXct(datetimes2, tz = "UTC"), lat = lat1, lon = lon1)

moonillum1<-getMoonIllumination(date = c(datetimes2), keep = c("fraction", "phase"))

    1. phase 0.25 asc half moon crescent 0.5 full moon 0.75 last qarter


sunset01<-getSunlightTimes(date = as.Date(date1, tz = "UTC"), lat = lat1, lon = lon1, keep=c("sunset")) sunset1=as.POSIXct( sunset01['sunset']$sunset, tz = "EET")


sunrise01<-getSunlightTimes(date = as.Date(date2, tz = "UTC"), lat = lat1, lon = lon1, keep=c("sunrise")) sunrise1=as.POSIXct( sunrise01['sunrise']$sunrise, tz = "EET")

print(sunset1) print(sunrise1)


  1. stop(-1)




salt1= sunpos1[4]$altitude saz1= sunpos1[4]$azimuth1

  1. print(salt1)

salt2=180*salt1/3.1416


saz2=(360*salt1)/3.1416



malt1= moonpos1[4]$altitude maz1= moonpos1[4]$azimuth1

  1. print(malt1)

malt2=180*malt1/3.1416


maz2=(360*malt1)/3.1416+360


print("Sun")

  1. print(sunpos1)
  1. print("Moon")
  1. print(moonpos1)


date1=as.POSIXct(datetimes2, tz=timezone1)

intensity1<-calculateMoonlightIntensity(lat1, lon1, datetimes2, e1)

  1. calculateMoonlightStatistics(lat, lon, date, e, t, timezone)
  1. print(intensity1)


  1. print(paikka1)
  2. print(c(datetimes2, " UTC") )
  1. print("Auringon korkeus, suuntakulma astetta")
  1. print(salt2)
  2. print(saz2)


  1. print("Kuun korkeus, suuntakulma astetta")
  2. print(malt2)
  1. print(maz2)


  1. print("Kuun valaistu osa ")
  2. print( moonillum1[2]$fraction )
  3. print("Kuun vaihe ")
  4. print( moonillum1[3]$phase )


  1. print ( "Valaistus lx" )
  2. print(intensity1['illumination']$illumination)
  3. print (" Josta kuunvaloa lx")
  4. print(intensity1['moonlightModel']$moonlightModel)

svg("tulilahti_Finland_illumination_night_27_28_07_1979_1.svg")

  1. plot(datetimes2,log10(intensity1['illumination']$illumination),
  2. col='orange', type='l', lwd=5,
  3. main="Illumination at Tulilahti, Heinävesi, Finland 27.-28.7. 1959",
  4. col.main='blue',
  5. xlab="Time UTC, 27-28.7 1959",
  6. ylab="Log10 (illumination lx)")

print("KKKK")



  1. datee <- hour(hm( datetimes2))
  2. datee <-hour(datetimes2)

datee0<-datetimes2 datee1<-format(datee0, tz="EET",usetz=TRUE) datee<-as.POSIXct( datee1, tz = "EET")


log10lx<-log10(intensity1['illumination']$illumination)

  1. print("pppp")

data2 <- data.frame(datee,log10lx)

  1. print("qqq")

names(data2)<-c("Time_EET", "Illum_log_Lx")


print("rrr")

  1. stop(-1)


  1. Plot

ggplot(data2, aes(x=Time_EET, y=Illum_log_Lx)) + 

 geom_line( color="#ff7f00", linewidth=1.5, alpha=0.9, linetype=1) +

ggtitle(label=" Illumination of Sun, night 27.-28.7.1959", subtitle="Tulilahti, Heinävesi, Savo, Finland ")+
 xlab("Time EET") + ylab("Max illumination, log10 of Lx")+



 scale_x_datetime(date_breaks = "1 hours", date_labels = "%H:%M")+
 theme_bw() +
 geom_hline(yintercept=log10(300), linetype="dashed", color = "red")+
 geom_hline(yintercept=log10(3.5), linetype="dashed", color = "red")+
 
  geom_hline(yintercept=log10(0.1), linetype="dashed", color = "blue") +
                                             
  annotate(geom="text", x=sunset1, y=log10(300), label="Sunset", color="black", size=6)+
  annotate(geom="text", x=sunrise1, y=log10(300), label="Sunrise", color="black", size=6)+
  annotate(geom="text", x=as.POSIXct("1959-7-27 22:00", tz = "EET"), y=log10(0.1), label="Full moon if it was", color="black", size=6)+
  annotate(geom="text", x=as.POSIXct("1959-7-27 22:00", tz = "EET"), y=log10(3.5), label="Limit of civil/nautical twilight ", color="black", size=6)+
  annotate(geom="text", x=as.POSIXct("1959-7-28 00:00", tz = "EET"), y=log10(30), label="Civil twilight ", color="blue", size=8)+
  annotate(geom="text", x=as.POSIXct("1959-7-28 00:00", tz = "EET"), y=log10(1), label="Nau. twi.", color="#00007f", size=8)+



  theme(text = element_text(size = 19, family="Sans") )+
theme(axis.text = element_text(size = 16)) +
theme(axis.title = element_text(size = 17)) +
theme(plot.title = element_text(size = 15, face = "bold"))

dev.off()


  1. statistics1<-calculateMoonlightStatistics(lat1, lon1, datetime1, e1, t1, timezone1)
  1. print(statistics1)

Licensing

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w:en:Creative Commons
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Date/TimeThumbnailDimensionsUserComment
current16:22, 13 August 2023Thumbnail for version as of 16:22, 13 August 2023630 × 630 (132 KB)Merikanto (talk | contribs)Update
15:22, 13 August 2023Thumbnail for version as of 15:22, 13 August 2023630 × 630 (127 KB)Merikanto (talk | contribs)Update
13:25, 13 August 2023Thumbnail for version as of 13:25, 13 August 2023630 × 630 (71 KB)Merikanto (talk | contribs)Uploaded own work with UploadWizard

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