{
  "_id": "6a103fb3acfb0bcc41c9ced7",
  "Package": "skytrackr",
  "Type": "Package",
  "Title": "A Sky Illuminance Location Tracker",
  "Version": "2.0",
  "Authors@R": "c(person(\nfamily = \"Hufkens\",\ngiven = \"Koen\",\nemail = \"koen.hufkens@gmail.com\",\nrole = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0002-5070-8109\")),\nperson(given = \"BlueGreen Labs\",\nrole = c(\"cph\", \"fnd\"))\n)",
  "Maintainer": "Koen Hufkens <koen.hufkens@gmail.com>",
  "Description": "Calculate geolocations by light using template matching.\nThe routine uses a calibration free optimization of a sky\nilluminance model to determine locations robustly using a\ntemplate matching approach, as described by Ekstrom (2004)\n<https://nipr.repo.nii.ac.jp/records/2496>, and behaviourly\ninformed constraints (step-selection).",
  "URL": "https://github.com/bluegreen-labs/skytrackr",
  "BugReports": "https://github.com/bluegreen-labs/skytrackr/issues",
  "License": "AGPL-3",
  "Encoding": "UTF-8",
  "LazyData": "true",
  "ByteCompile": "true",
  "RoxygenNote": "7.3.2",
  "VignetteBuilder": "knitr",
  "Config/pak/sysreqs": "libabsl-dev cmake libfontconfig1-dev\nlibfreetype6-dev libfribidi-dev libgdal-dev gdal-bin\nlibgeos-dev make libharfbuzz-dev libicu-dev libpng-dev\nlibuv1-dev libssl-dev libproj-dev libsqlite3-dev\nlibudunits2-dev zlib1g-dev",
  "Repository": "https://bluegreen-labs.r-universe.dev",
  "Date/Publication": "2026-01-11 16:08:13 UTC",
  "RemoteUrl": "https://github.com/bluegreen-labs/skytrackr",
  "RemoteRef": "HEAD",
  "RemoteSha": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-05-11 08:38:03 UTC",
    "User": "root"
  },
  "Author": "Koen Hufkens [aut, cre] (ORCID:\n<https://orcid.org/0000-0002-5070-8109>),\nBlueGreen Labs [cph, fnd]",
  "MD5sum": "11b4a2b77e06a41bb93a234b07b22f71",
  "_user": "bluegreen-labs",
  "_type": "src",
  "_file": "skytrackr_2.0.tar.gz",
  "_fileid": "36a05e3cd431e5d0f1d225dada335280819ba717867c12279a9b64706f87f68f",
  "_filesize": 5224310,
  "_sha256": "36a05e3cd431e5d0f1d225dada335280819ba717867c12279a9b64706f87f68f",
  "_created": "2026-05-11T08:38:03.000Z",
  "_published": "2026-05-22T11:36:19.965Z",
  "_distro": "noble",
  "_jobs": [
    {
      "job": 77371553563,
      "time": 206,
      "config": "linux-devel-x86_64",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "6913968825"
    },
    {
      "job": 77371553876,
      "time": 198,
      "config": "linux-release-x86_64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "6913963868"
    },
    {
      "job": 77371553321,
      "time": 160,
      "config": "macos-oldrel-arm64",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "6913951369"
    },
    {
      "job": 77371553489,
      "time": 120,
      "config": "macos-release-arm64",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "6913940445"
    },
    {
      "job": 77371553038,
      "time": 256,
      "config": "source",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "6913900882"
    },
    {
      "job": 77371552942,
      "time": 152,
      "config": "wasm-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "7159534423"
    },
    {
      "job": 77371553530,
      "time": 637,
      "config": "windows-devel",
      "r": "4.7.0",
      "check": "OK",
      "artifact": "6914103046"
    },
    {
      "job": 77371553532,
      "time": 514,
      "config": "windows-oldrel",
      "r": "4.5.3",
      "check": "OK",
      "artifact": "6914064477"
    },
    {
      "job": 77371553438,
      "time": 144,
      "config": "windows-release",
      "r": "4.6.0",
      "check": "OK",
      "artifact": "6913947377"
    }
  ],
  "_buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808",
  "_status": "success",
  "_host": "GitHub-Actions",
  "_upstream": "https://github.com/bluegreen-labs/skytrackr",
  "_commit": {
    "id": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
    "author": "Koen Hufkens <1354258+khufkens@users.noreply.github.com>",
    "committer": "GitHub <noreply@github.com>",
    "message": "Create codeberg-mirror.yml",
    "time": 1768147693
  },
  "_maintainer": {
    "name": "Koen Hufkens",
    "email": "koen.hufkens@gmail.com",
    "login": "khufkens",
    "mastodon": "@koen_hufkens@mastodon.social",
    "linkedin": "in/koen-hufkens",
    "uuid": 1354258,
    "orcid": "0000-0002-5070-8109"
  },
  "_registered": true,
  "_dependencies": [
    {
      "package": "R",
      "version": ">= 4.2",
      "role": "Depends"
    },
    {
      "package": "skylight",
      "role": "Imports"
    },
    {
      "package": "circular",
      "role": "Imports"
    },
    {
      "package": "BayesianTools",
      "role": "Imports"
    },
    {
      "package": "cli",
      "role": "Imports"
    },
    {
      "package": "utils",
      "role": "Imports"
    },
    {
      "package": "zoo",
      "role": "Imports"
    },
    {
      "package": "stats",
      "role": "Imports"
    },
    {
      "package": "rlang",
      "role": "Imports"
    },
    {
      "package": "sf",
      "role": "Imports"
    },
    {
      "package": "terra",
      "role": "Imports"
    },
    {
      "package": "sfdep",
      "role": "Imports"
    },
    {
      "package": "tidyterra",
      "role": "Imports"
    },
    {
      "package": "geosphere",
      "role": "Imports"
    },
    {
      "package": "tidyr",
      "role": "Imports"
    },
    {
      "package": "dplyr",
      "role": "Imports"
    },
    {
      "package": "ggplot2",
      "role": "Imports"
    },
    {
      "package": "plotly",
      "role": "Imports"
    },
    {
      "package": "patchwork",
      "role": "Imports"
    },
    {
      "package": "mapview",
      "role": "Imports"
    },
    {
      "package": "knitr",
      "role": "Suggests"
    },
    {
      "package": "rmarkdown",
      "role": "Suggests"
    },
    {
      "package": "bookdown",
      "role": "Suggests"
    },
    {
      "package": "covr",
      "role": "Suggests"
    },
    {
      "package": "testthat",
      "role": "Suggests"
    },
    {
      "package": "multidplyr",
      "role": "Suggests"
    }
  ],
  "_owner": "bluegreen-labs",
  "_selfowned": true,
  "_usedby": 0,
  "_updates": [
    {
      "week": "2025-35",
      "n": 7
    },
    {
      "week": "2025-36",
      "n": 6
    },
    {
      "week": "2025-38",
      "n": 1
    },
    {
      "week": "2025-39",
      "n": 25
    },
    {
      "week": "2025-40",
      "n": 35
    },
    {
      "week": "2025-42",
      "n": 4
    },
    {
      "week": "2025-43",
      "n": 17
    },
    {
      "week": "2025-44",
      "n": 43
    },
    {
      "week": "2025-45",
      "n": 12
    },
    {
      "week": "2025-46",
      "n": 1
    },
    {
      "week": "2025-47",
      "n": 17
    },
    {
      "week": "2025-48",
      "n": 33
    },
    {
      "week": "2025-49",
      "n": 21
    },
    {
      "week": "2026-02",
      "n": 1
    }
  ],
  "_tags": [
    {
      "name": "v1.0",
      "date": "2025-10-04"
    },
    {
      "name": "v2.0",
      "date": "2025-12-02"
    }
  ],
  "_topics": [
    "geolocation",
    "light-logger",
    "movement-ecology",
    "ornithology"
  ],
  "_stars": 1,
  "_contributors": [
    {
      "user": "khufkens",
      "count": 400,
      "uuid": 1354258
    }
  ],
  "_userbio": {
    "uuid": 65854203,
    "type": "organization",
    "name": "BlueGreen Labs",
    "description": "BlueGreen open science labs & consulting: environmental research infrastructure to address climate change through data driven methods"
  },
  "_downloads": {
    "count": 193,
    "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/skytrackr"
  },
  "_devurl": "https://github.com/bluegreen-labs/skytrackr",
  "_searchresults": 4,
  "_rbuild": "4.6.0",
  "_assets": [
    "extra/citation.cff",
    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/readme.html",
    "extra/readme.md",
    "extra/skytrackr.html",
    "manual.pdf"
  ],
  "_homeurl": "https://github.com/bluegreen-labs/skytrackr",
  "_realowner": "bluegreen-labs",
  "_cranurl": true,
  "_releases": [
    {
      "version": "1.0",
      "date": "2025-10-08"
    },
    {
      "version": "2.0",
      "date": "2025-12-02"
    }
  ],
  "_exports": [
    "diurnal",
    "individual",
    "likelihood",
    "read_deg_lux",
    "skytrackr",
    "stk_calibrate",
    "stk_center",
    "stk_cluster",
    "stk_filter",
    "stk_fit",
    "stk_map",
    "stk_mask",
    "stk_profile",
    "stk_read_glf",
    "stk_read_lux",
    "stk_screen_twl"
  ],
  "_datasets": [
    {
      "name": "cc876",
      "title": "Migrate Technology Ltd demo data",
      "object": "cc876",
      "class": [
        "tbl_df",
        "tbl",
        "data.frame"
      ],
      "fields": [
        "logger",
        "date_time",
        "date",
        "hour",
        "measurement",
        "value"
      ],
      "rows": 8640,
      "table": true,
      "tojson": true
    },
    {
      "name": "lakes",
      "title": "Lakes",
      "object": "lakes",
      "class": [
        "sfc_POLYGON",
        "sfc"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "land",
      "title": "Land area polygon",
      "object": "land",
      "class": [
        "sfc_MULTIPOLYGON",
        "sfc"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    },
    {
      "name": "rivers",
      "title": "River lines",
      "object": "rivers",
      "class": [
        "sfc_MULTILINESTRING",
        "sfc"
      ],
      "fields": [],
      "table": false,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "cc876",
      "title": "Migrate Technology Ltd demo data",
      "topics": [
        "cc876"
      ]
    },
    {
      "page": "diurnal",
      "title": "Simulate diurnal illuminance value",
      "topics": [
        "diurnal"
      ]
    },
    {
      "page": "individual",
      "title": "Updates values individually not globally (diurnally)",
      "topics": [
        "individual"
      ]
    },
    {
      "page": "lakes",
      "title": "Lakes",
      "topics": [
        "lakes"
      ]
    },
    {
      "page": "land",
      "title": "Land area polygon",
      "topics": [
        "land"
      ]
    },
    {
      "page": "likelihood",
      "title": "Log likelihood cost function",
      "topics": [
        "likelihood"
      ]
    },
    {
      "page": "read_deg_lux",
      "title": "Read lux and deg files",
      "topics": [
        "read_deg_lux"
      ]
    },
    {
      "page": "rivers",
      "title": "River lines",
      "topics": [
        "rivers"
      ]
    },
    {
      "page": "skytrackr",
      "title": "Sky (illuminance) location estimation routine",
      "topics": [
        "skytrackr"
      ]
    },
    {
      "page": "stk_calibrate",
      "title": "Estimate scale the scale range",
      "topics": [
        "stk_calibrate"
      ]
    },
    {
      "page": "stk_center",
      "title": "Centers diurnal curves on midday",
      "topics": [
        "stk_center"
      ]
    },
    {
      "page": "stk_cluster",
      "title": "Cluster geolocator co-variates",
      "topics": [
        "stk_cluster"
      ]
    },
    {
      "page": "stk_filter",
      "title": "Filter twilight values by range",
      "topics": [
        "stk_filter"
      ]
    },
    {
      "page": "stk_fit",
      "title": "Fit illuminance (lux) profile",
      "topics": [
        "stk_fit"
      ]
    },
    {
      "page": "stk_map",
      "title": "Plot skytrackr results",
      "topics": [
        "stk_map"
      ]
    },
    {
      "page": "stk_mask",
      "title": "Generate a land surface mask",
      "topics": [
        "stk_mask"
      ]
    },
    {
      "page": "stk_profile",
      "title": "Plot seasonal profiles",
      "topics": [
        "stk_profile"
      ]
    },
    {
      "page": "stk_read_glf",
      "title": "Read Swiss Ornithology institute GLF files",
      "topics": [
        "stk_read_glf"
      ]
    },
    {
      "page": "stk_read_lux",
      "title": "Read Migrate Technology .lux files",
      "topics": [
        "stk_read_lux"
      ]
    },
    {
      "page": "stk_screen_twl",
      "title": "Twilight screening routine",
      "topics": [
        "stk_screen_twl"
      ]
    }
  ],
  "_readme": "https://github.com/bluegreen-labs/skytrackr/raw/HEAD/README.md",
  "_rundeps": [
    "ape",
    "askpass",
    "base64enc",
    "BayesianTools",
    "boot",
    "brew",
    "bridgesampling",
    "Brobdingnag",
    "bslib",
    "cachem",
    "circular",
    "class",
    "classInt",
    "cli",
    "coda",
    "codetools",
    "commonmark",
    "cpp11",
    "crosstalk",
    "curl",
    "data.table",
    "DBI",
    "deldir",
    "DHARMa",
    "digest",
    "doParallel",
    "dplyr",
    "e1071",
    "ellipse",
    "emulator",
    "evaluate",
    "expm",
    "farver",
    "fastmap",
    "fontawesome",
    "foreach",
    "fs",
    "gap",
    "gap.datasets",
    "generics",
    "geojsonsf",
    "geometries",
    "geosphere",
    "ggplot2",
    "glue",
    "gmm",
    "gtable",
    "highr",
    "htmltools",
    "htmlwidgets",
    "httpuv",
    "httr",
    "IDPmisc",
    "isoband",
    "iterators",
    "jquerylib",
    "jsonify",
    "jsonlite",
    "KernSmooth",
    "knitr",
    "labeling",
    "later",
    "lattice",
    "lazyeval",
    "leafem",
    "leaflet",
    "leaflet.providers",
    "leafpop",
    "lifecycle",
    "lme4",
    "lmtest",
    "magrittr",
    "mapview",
    "MASS",
    "Matrix",
    "memoise",
    "mgcv",
    "mime",
    "minqa",
    "msm",
    "mvtnorm",
    "nlme",
    "nloptr",
    "numDeriv",
    "openssl",
    "otel",
    "patchwork",
    "pillar",
    "pkgconfig",
    "plotly",
    "plyr",
    "png",
    "promises",
    "proxy",
    "purrr",
    "qgam",
    "R6",
    "rapidjsonr",
    "rappdirs",
    "raster",
    "rbibutils",
    "RColorBrewer",
    "Rcpp",
    "RcppArmadillo",
    "RcppEigen",
    "Rdpack",
    "reformulas",
    "rlang",
    "rmarkdown",
    "s2",
    "S7",
    "sandwich",
    "sass",
    "satellite",
    "scales",
    "servr",
    "sf",
    "sfdep",
    "sfheaders",
    "shiny",
    "skylight",
    "sourcetools",
    "sp",
    "spData",
    "spdep",
    "stringi",
    "stringr",
    "survival",
    "svglite",
    "sys",
    "systemfonts",
    "terra",
    "textshaping",
    "tibble",
    "tidyr",
    "tidyselect",
    "tidyterra",
    "tinytex",
    "tmvtnorm",
    "units",
    "utf8",
    "uuid",
    "vctrs",
    "viridisLite",
    "withr",
    "wk",
    "xfun",
    "xtable",
    "yaml",
    "zoo"
  ],
  "_vignettes": [
    {
      "source": "skytrackr_benchmark.Rmd",
      "filename": "skytrackr_benchmark.html",
      "title": "Benchmark",
      "author": "Koen Hufkens",
      "engine": "knitr::rmarkdown",
      "headings": [
        "SGAT",
        "FlightR"
      ],
      "created": "2025-11-24 16:13:25",
      "modified": "2025-12-03 07:55:43",
      "commits": 2
    },
    {
      "source": "skytrackr_optimization.Rmd",
      "filename": "skytrackr_optimization.html",
      "title": "Optimization tips",
      "author": "Koen Hufkens",
      "engine": "knitr::rmarkdown",
      "headings": [
        "Introduction",
        "Pre-processing",
        "Data quality",
        "Data frequency",
        "The scale parameter",
        "Light loss theory",
        "Estimating the scale from data",
        "Optimization iterations",
        "Step-selection dynamics",
        "The light model used",
        "Post-processing"
      ],
      "created": "2025-10-02 10:40:46",
      "modified": "2025-11-28 18:31:30",
      "commits": 15
    },
    {
      "source": "skytrackr_parallel_processing.Rmd",
      "filename": "skytrackr_parallel_processing.html",
      "title": "Parallel processing",
      "author": "Koen Hufkens",
      "engine": "knitr::rmarkdown",
      "headings": [
        "Introduction",
        "Data setup",
        "",
        "Parallel processing"
      ],
      "created": "2025-10-02 09:14:07",
      "modified": "2025-10-18 11:36:51",
      "commits": 4
    },
    {
      "source": "skytrackr_vignette.Rmd",
      "filename": "skytrackr_vignette.html",
      "title": "The skytrackr R package",
      "author": "Koen Hufkens",
      "engine": "knitr::rmarkdown",
      "headings": [
        "Abstract",
        "Background",
        "Implementation",
        "Optimization strategy",
        "Behavioural component",
        "Workflow",
        "Reading data",
        "Cleaning data",
        "Creating a land mask",
        "Defining a step-selection",
        "Estimating positions",
        "Optimization caveats (advanced control settings)",
        "Visualizing location estimates",
        "Discussion",
        "Limitations & future improvements",
        "Conclusion",
        "Availability and requirements",
        "References"
      ],
      "created": "2025-09-25 12:48:03",
      "modified": "2025-12-02 08:28:16",
      "commits": 4
    }
  ],
  "_score": 5.447158031342219,
  "_indexed": true,
  "_nocasepkg": "skytrackr",
  "_universes": [
    "bluegreen-labs",
    "khufkens"
  ],
  "_binaries": [
    {
      "r": "4.7.0",
      "os": "linux",
      "version": "2.0",
      "date": "2026-05-11T08:41:03.000Z",
      "distro": "noble",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "d9103d54022a844d5bf0e9537a17b931c205f8d31829c513984e92a658530b2a",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.6.0",
      "os": "linux",
      "version": "2.0",
      "date": "2026-05-11T08:40:51.000Z",
      "distro": "noble",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "98acec0a6d5f0322e704498cac9d6cd1b5fe2f7e42b52bf7d719c3c8352a3844",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.5.3",
      "os": "mac",
      "version": "2.0",
      "date": "2026-05-11T08:40:06.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "0f92a21ebc19a97bdd3024891c34307f5551f79e67ac8f214d1262c6f89c6626",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.6.0",
      "os": "mac",
      "version": "2.0",
      "date": "2026-05-11T08:39:40.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "ebcb4f7cdcf487580c038b46f863d2e1f564f9592817bdd01f6540a7e4295eaf",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.7.0",
      "os": "win",
      "version": "2.0",
      "date": "2026-05-11T08:47:53.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "4400efbb20b351e4714a9b9b6757e5b1ae1e5ed4f234ef9dd1a846224fae2fcc",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.5.3",
      "os": "win",
      "version": "2.0",
      "date": "2026-05-11T08:45:52.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "e2b3dbe0ce2c56352ddbddda90d92e34f5f09954934287b353a1be8e53d9041c",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.6.0",
      "os": "win",
      "version": "2.0",
      "date": "2026-05-11T08:39:39.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "47e613dcce5ff6378a5e196d99ba4f5bf7359ddb113ea4b510b2b919e31375ec",
      "status": "success",
      "check": "OK",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    },
    {
      "r": "4.6.0",
      "os": "wasm",
      "version": "2.0",
      "date": "2026-05-22T11:35:54.000Z",
      "commit": "11c412ac9ce1cf786c69b62d29e5292da6b80a92",
      "fileid": "2f7d342107a3146ed1ad854228aaabde70e4bb8d8b0a1d21dbb0c6d53556bffb",
      "status": "success",
      "buildurl": "https://github.com/r-universe/bluegreen-labs/actions/runs/25659305808"
    }
  ]
}