{ "_id": "6a23dced530b9bc726be6b03", "Package": "leafSTAR", "Title": "Silhouette to Area Ratio of Tilted Surfaces", "Version": "1.0", "Author": "Agustina Ventre Lespiaucq [aut, cre], Silvia Santamaria Bueno\n[aut]", "Maintainer": "Agustina Ventre Lespiaucq ", "Description": "Implementation of trigonometric functions to calculate the\nexposure of flat, tilted surfaces, such as leaves and slopes,\nto direct solar radiation. It implements the equations in A.G.\nEscribano-Rocafort, A. Ventre-Lespiaucq, C. Granado-Yela, et\nal. (2014) in a few user-friendly\nR functions. All functions handle data obtained with 'Ahmes'\n1.0 for Android, as well as more traditional data sources\n(compass, protractor, inclinometer). The main function (star())\ncalculates the potential exposure of flat, tilted surfaces to\ndirect solar radiation (silhouette to area ratio, STAR). It is\nequivalent to the ratio of the leaf projected area to total\nleaf area, but instead of using area data it uses spatial\nposition angles, such as pitch, roll and course, and\ninformation on the geographical coordinates, hour, and date.\nThe package includes additional functions to recalculate STAR\nwith custom settings of location and time, to calculate the\ntilt angle of a surface, and the minimum angle between two\nnon-orthogonal planes.", "License": "AGPL-3", "Encoding": "UTF-8", "LazyData": "true", "RoxygenNote": "6.0.1", "NeedsCompilation": "no", "Packaged": { "Date": "2026-06-06 08:37:39 UTC", "User": "root" }, "Repository": "https://aguslespi.r-universe.dev", "Date/Publication": "2017-09-18 12:37:22 UTC", "RemoteUrl": "https://github.com/cran/leafSTAR", "RemoteRef": "HEAD", "RemoteSha": "bb50faf4884fd98b7f115d7fa0637cec1a6196d2", "MD5sum": "0830068e9172fc8508f859006664908e", "_user": "aguslespi", "_type": "src", "_file": "leafSTAR_1.0.tar.gz", "_fileid": "a97024a036e01989ce12df522ce5c5ac9ab742827d677664caf3b180a21a1ddd", "_filesize": 197953, "_sha256": "a97024a036e01989ce12df522ce5c5ac9ab742827d677664caf3b180a21a1ddd", "_created": "2026-06-06T08:37:39.000Z", "_published": "2026-06-06T08:40:13.956Z", "_distro": "noble", "_jobs": [ { "job": 79864797521, "time": 100, "config": "linux-devel-x86_64", "r": "4.7.0", "check": "OK", "artifact": "7452916902" }, { "job": 79864797522, "time": 95, "config": "linux-release-x86_64", "r": "4.6.0", "check": "OK", "artifact": "7452916429" }, { "job": 79864797516, "time": 123, "config": "macos-oldrel-arm64", "r": "4.5.3", "check": "OK", "artifact": "7452917280" }, { "job": 79864797525, "time": 127, "config": "macos-release-arm64", "r": "4.6.0", "check": "OK", "artifact": "7452916023" }, { "job": 79864683416, "time": 131, "config": "source", "r": "4.6.0", "check": "OK", "artifact": "7452905671" }, { "job": 79864797518, "time": 74, "config": "wasm-release", "r": "4.6.0", "check": "OK", "artifact": "7452913966" }, { "job": 79864797529, "time": 83, "config": "windows-devel", "r": "4.7.0", "check": "OK", "artifact": "7452915020" }, { "job": 79864797544, "time": 89, "config": "windows-oldrel", "r": "4.5.3", "check": "OK", "artifact": "7452915840" }, { "job": 79864797524, "time": 59, "config": "windows-release", "r": "4.6.0", "check": "OK", "artifact": "7452912377" } ], "_buildurl": "https://github.com/r-universe/aguslespi/actions/runs/27057587315", "_status": "success", "_host": "GitHub-Actions", "_upstream": "https://github.com/cran/leafSTAR", "_commit": { "id": "bb50faf4884fd98b7f115d7fa0637cec1a6196d2", "author": "Agustina Ventre Lespiaucq ", "committer": "cran-robot ", "message": "version 1.0\n", "time": 1505738242 }, "_maintainer": { "name": "Agustina Ventre Lespiaucq", "email": "aguslespiaucq@gmail.com", "login": "aguslespi", "description": "I am a researcher in Plant Ecology. Love science, data analysis, R, and knowledge sharing.", "uuid": 43585364 }, "_registered": true, "_dependencies": [ { "package": "R", "version": ">= 3.4.1", "role": "Depends" } ], "_owner": "cran", "_selfowned": true, "_usedby": 0, "_updates": [], "_tags": [], "_stars": 0, "_contributors": [ { "user": "aguslespi", "count": 1, "uuid": 43585364 } ], "_userbio": { "uuid": 43585364, "type": "user", "name": "Agustina Ventre Lespiaucq", "description": "I am a researcher in Plant Ecology. Love science, data analysis, R, and knowledge sharing." }, "_downloads": { "count": 568, "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/leafSTAR" }, "_mentions": 1, "_searchresults": 9, "_rbuild": "4.6.0", "_assets": [ "extra/citation.cff", "extra/citation.html", "extra/citation.json", "extra/citation.txt", "extra/contents.json", "extra/leafSTAR.html", "manual.pdf" ], "_realowner": "aguslespi", "_cranurl": false, "_releases": [ { "version": "1.0", "date": "2017-09-18" } ], "_exports": [ "dihedral", "fixfile", "fixhour", "sal", "simu.star", "simu.star.app", "star", "star.app", "tilt" ], "_datasets": [ { "name": "guava", "title": "Leaf angles of guava trees", "object": "guava", "class": [ "data.frame" ], "fields": [ "tree.ID", "leaf.ID", "measure.ID", "sector", "azimuth", "pitch", "roll", "course", "LA.cm2", "tilt.degrees", "course.degrees" ], "rows": 239, "table": true, "tojson": true }, { "name": "olea", "title": "Leaf angles of olive tree measured with 'Ahmes' 1.0", "object": "olea", "class": [ "data.frame" ], "fields": [ "V1", "V2", "V3", "V4", "V5", "V6", "V7", "V8", "V9", "V10", "V11", "V12", "V13", "V14", "V15" ], "rows": 24, "table": true, "tojson": true }, { "name": "olive", "title": "Leaf angles of olive tree measured with a compass and inclinometer", "object": "olive", "class": [ "data.frame" ], "fields": [ "location", "latitude", "longitude", "date", "hour", "tz", "leaf.ID", "tilt", "course", "azimuth" ], "rows": 20, "table": true, "tojson": true }, { "name": "orchids", "title": "Leaf and pseudobulb angles of epiphytic orchids", "object": "orchids", "class": [ "data.frame" ], "fields": [ "measure.ID", "orchid.ID", "organ", "module", "pitch", "roll", "course" ], "rows": 500, "table": true, "tojson": true }, { "name": "tropical", "title": "Leaf angles of tropical canopy trees measured with traditional instrumentation", "object": "tropical", "class": [ "data.frame" ], "fields": [ "species", "environment", "pitch", "roll" ], "rows": 41, "table": true, "tojson": true } ], "_help": [ { "page": "Ahmes", "title": "Application for smartphones for measuring the position angles of flat, tilted surfaces.", "topics": [ "Ahmes" ] }, { "page": "dihedral", "title": "Calculate the dihedral angle between two planes", "topics": [ "dihedral" ] }, { "page": "fixfile", "title": "Fix the output of 'Ahmes' 1.0", "topics": [ "fixfile" ] }, { "page": "fixhour", "title": "Fix the hour format", "topics": [ "fixhour" ] }, { "page": "guava", "title": "Leaf angles of guava trees", "topics": [ "guava" ] }, { "page": "olea", "title": "Leaf angles of olive tree measured with 'Ahmes' 1.0", "topics": [ "olea" ] }, { "page": "olive", "title": "Leaf angles of olive tree measured with a compass and inclinometer", "topics": [ "olive" ] }, { "page": "orchids", "title": "Leaf and pseudobulb angles of epiphytic orchids", "topics": [ "orchids" ] }, { "page": "sal", "title": "Calculate the projected surface area of a tilted plane", "topics": [ "sal" ] }, { "page": "simu.star", "title": "Calculate simulated silhouette to area ratios", "topics": [ "simu.star" ] }, { "page": "simu.star.app", "title": "Calculate simulated silhouette to area ratios from 'Ahmes' 1.0", "topics": [ "simu.star.app" ] }, { "page": "star", "title": "Calculate the silhouette to area ratio", "topics": [ "star" ] }, { "page": "star.app", "title": "Calculate the silhouette to area ratio from 'Ahmes' 1.0", "topics": [ "star.app" ] }, { "page": "tilt", "title": "Calculate the tilt angle", "topics": [ "tilt" ] }, { "page": "tropical", "title": "Leaf angles of tropical canopy trees measured with traditional instrumentation", "topics": [ "tropical" ] } ], "_rundeps": [], "_score": 1, "_indexed": true, "_nocasepkg": "leafstar", "_universes": [ "aguslespi" ], "_binaries": [ { "r": "4.7.0", "os": "linux", "version": "1.0", "date": "2026-06-06T08:39:23.000Z", "distro": "noble", "commit": "bb50faf4884fd98b7f115d7fa0637cec1a6196d2", "fileid": 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