R: Example data for calibration: Light intensities and twilight...
calib1
R Documentation
Example data for calibration: Light intensities and twilight events
Description
Light intensity measurements over time (calib1) recorded at the rooftop of
the Swiss Ornithological Institute (Lon: 8.0, Lat: 47.01). Defined twilight
events from calib1 (calib2). These data serve as an example for calculating
the sun elevation angle of an additional data set, which is subsequently
used to calibrate the focal dataset.
References
Lisovski, S., Hewson, C.M, Klaassen, R.H.G., Korner-Nievergelt,
F., Kristensen, M.W & Hahn, S. (2012) Geolocation by light: Accuracy and
precision affected by environmental factors. Methods in Ecology and
Evolution, DOI: 10.1111/j.2041-210X.2012.00185.x.
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
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> library(GeoLight)
Loading required package: maps
# maps v3.1: updated 'world': all lakes moved to separate new #
# 'lakes' database. Type '?world' or 'news(package="maps")'. #
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/GeoLight/calib1.Rd_%03d_medium.png", width=480, height=480)
> ### Name: calib1
> ### Title: Example data for calibration: Light intensities and twilight
> ### events
> ### Aliases: calib calib1 calib2
>
> ### ** Examples
>
> data(calib2)
> calib2$tFirst <- as.POSIXct(calib2$tFirst, tz = "GMT")
> calib2$tSecond <- as.POSIXct(calib2$tSecond, tz = "GMT")
> getElevation(calib2, known.coord = c(8,47.01))
med.elev
-5.871821
>
>
>
>
>
> dev.off()
null device
1
>