suntools: Calculate Sun Position, Sunrise, Sunset, Solar Noon and Twilight

Provides a set of convenient functions for calculating sun-related information, including the sun's position (elevation and azimuth), and the times of sunrise, sunset, solar noon, and twilight for any given geographical location on Earth. These calculations are based on equations provided by the National Oceanic & Atmospheric Administration (NOAA) <https://gml.noaa.gov/grad/solcalc/calcdetails.html> as described in "Astronomical Algorithms" by Jean Meeus (1991, ISBN: 978-0-943396-35-4).

Version:	1.1.0
Depends:	R (≥ 2.10)
Imports:	methods, sf, stats
Suggests:	testthat (≥ 3.0.0)
Published:	2025-11-07
DOI:	10.32614/CRAN.package.suntools
Author:	Roger Bivand [aut], Adriaan M. Dokter [ctb, cre], Pieter Huybrechts [ctb], Sebastian Luque [aut], Greg Pelletier [ctb], Alexander Tedeschi [ctb]
Maintainer:	Adriaan M. Dokter <amd427 at cornell.edu>
BugReports:	https://github.com/adokter/suntools/issues
License:	GPL (≥ 3)
URL:	https://github.com/adokter/suntools/
NeedsCompilation:	no
Materials:	README, NEWS
CRAN checks:	suntools results

Documentation:

Reference manual:

suntools.html , suntools.pdf

Downloads:

Package source:	suntools_1.1.0.tar.gz
Windows binaries:	r-devel: suntools_1.1.0.zip, r-release: suntools_1.1.0.zip, r-oldrel: suntools_1.1.0.zip
macOS binaries:	r-release (arm64): suntools_1.1.0.tgz, r-oldrel (arm64): suntools_1.1.0.tgz, r-release (x86_64): suntools_1.1.0.tgz, r-oldrel (x86_64): suntools_1.1.0.tgz
Old sources:	suntools archive

Reverse dependencies:

Reverse depends:	overlap, StreamMetabolism
Reverse imports:	bioRad, birdscanR, EMbC, FLightR, LightLogR, RchivalTag

Linking:

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