SunCalcMeeus: Sun Position and Daylight Calculations

Compute the position of the sun, and local solar time using Meeus' formulae. Compute day and/or night length using different twilight definitions or arbitrary sun elevation angles. This package is part of the 'r4photobiology' suite, Aphalo, P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>. Algorithms from Meeus (1998, ISBN:0943396611).

Version: 0.1.3
Depends: R (≥ 4.1.0)
Imports: stats, tibble (≥ 3.3.0), lubridate (≥ 1.9.4), dplyr (≥ 1.1.4)
Suggests: knitr (≥ 1.50), rmarkdown (≥ 2.29), testthat (≥ 3.2.3), roxygen2 (≥ 7.3.0), lutz (≥ 0.3.2), covr, spelling
Published: 2025-09-22
DOI: 10.32614/CRAN.package.SunCalcMeeus
Author: Pedro J. Aphalo ORCID iD [aut, cre]
Maintainer: Pedro J. Aphalo <pedro.aphalo at helsinki.fi>
BugReports: https://github.com/aphalo/SunCalcMeeus/issues
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
URL: https://docs.r4photobiology.info/SunCalcMeeus/, https://github.com/aphalo/SunCalcMeeus
NeedsCompilation: no
Language: en-US
Citation: SunCalcMeeus citation info
Materials: README, NEWS
CRAN checks: SunCalcMeeus results

Documentation:

Reference manual: SunCalcMeeus.html , SunCalcMeeus.pdf
Vignettes: User Guide: 0 The R for Photobiology Suite (source, R code)
User Guide (source, R code)

Downloads:

Package source: SunCalcMeeus_0.1.3.tar.gz
Windows binaries: r-devel: SunCalcMeeus_0.1.3.zip, r-release: SunCalcMeeus_0.1.3.zip, r-oldrel: SunCalcMeeus_0.1.3.zip
macOS binaries: r-release (arm64): SunCalcMeeus_0.1.3.tgz, r-oldrel (arm64): SunCalcMeeus_0.1.3.tgz, r-release (x86_64): SunCalcMeeus_0.1.3.tgz, r-oldrel (x86_64): SunCalcMeeus_0.1.3.tgz
Old sources: SunCalcMeeus archive

Reverse dependencies:

Reverse depends: photobiology
Reverse imports: photobiologyInOut

Linking:

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