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  "Title": "Sun Position and Daylight Calculations",
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  "URL": "https://docs.r4photobiology.info/SunCalcMeeus/,\nhttps://github.com/aphalo/SunCalcMeeus",
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  "Date/Publication": "2026-04-15 08:52:27 UTC",
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    "name": "Pedro J. Aphalo",
    "description": "Visiting researcher (Retired Senior Lecturer)\r\n(Sensory Ecology of Plants, Photobiology, Crops, Forest trees, Data Analysis, Data Visualization)"
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    "bind_geocodes",
    "day_length",
    "day_night",
    "distance_to_sun",
    "irrad_extraterrestrial",
    "is_daytime",
    "is_valid_geocode",
    "is.solar_date",
    "is.solar_time",
    "length_geocode",
    "na_geocode",
    "night_length",
    "noon_time",
    "relative_AM",
    "relative_AM_geotime",
    "relative_AMt",
    "relative_AMt_geotime",
    "solar_time",
    "split_geocodes",
    "sun_angles",
    "sun_azimuth",
    "sun_elevation",
    "sun_zenith_angle",
    "sunrise_time",
    "sunset_time",
    "tz_time_diff",
    "validate_geocode"
  ],
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    {
      "page": "SunCalcMeeus-package",
      "title": "SunCalcMeeus: Sun Position and Daylight Calculations",
      "topics": [
        "SunCalcMeeus-package",
        "SunCalcMeeus"
      ]
    },
    {
      "page": "as_tod",
      "title": "Convert datetime to time-of-day",
      "concept": [
        "Time of day functions"
      ],
      "topics": [
        "as_tod"
      ]
    },
    {
      "page": "as.solar_date",
      "title": "Convert a solar_time object into solar_date object",
      "concept": [
        "Local solar time functions"
      ],
      "topics": [
        "as.solar_date"
      ]
    },
    {
      "page": "day_night",
      "title": "Times for sun positions",
      "concept": [
        "astronomy related functions"
      ],
      "topics": [
        "day_length",
        "day_night",
        "day_night_fast",
        "is_daytime",
        "night_length",
        "noon_time",
        "sunrise_time",
        "sunset_time"
      ]
    },
    {
      "page": "format.solar_time",
      "title": "Encode in a Common Format",
      "concept": [
        "astronomy related functions"
      ],
      "topics": [
        "format.solar_time"
      ]
    },
    {
      "page": "format.tod_time",
      "title": "Encode in a Common Format",
      "concept": [
        "Time of day functions"
      ],
      "topics": [
        "format.tod_time"
      ]
    },
    {
      "page": "irrad_extraterrestrial",
      "title": "Extraterrestrial solar irradiance",
      "topics": [
        "irrad_extraterrestrial"
      ]
    },
    {
      "page": "is.solar_time",
      "title": "Query class",
      "concept": [
        "Local solar time functions"
      ],
      "topics": [
        "is.solar_date",
        "is.solar_time"
      ]
    },
    {
      "page": "print.solar_time",
      "title": "Print solar time and solar date objects",
      "concept": [
        "Local solar time functions"
      ],
      "topics": [
        "print.solar_date",
        "print.solar_time"
      ]
    },
    {
      "page": "print.tod_time",
      "title": "Print time-of-day objects",
      "concept": [
        "Time of day functions"
      ],
      "topics": [
        "print.tod_time"
      ]
    },
    {
      "page": "relative_AM",
      "title": "Relative Air Mass (AM)",
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        "relative_AMt",
        "relative_AMt_geotime",
        "relative_AM_geotime"
      ]
    },
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      "page": "solar_time",
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        "solar_time"
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        "length_geocode",
        "na_geocode",
        "validate_geocode"
      ]
    }
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