riseset: Computes the rising and setting azimuth, declination and time...
In skyscapeR: Data Analysis and Visualization for Skyscape Archaeology

Description Usage Arguments See Also Examples

Computes the rising and setting azimuth, declination and time of a Solar System object for a given location and day

riseset(
  obj = "sun",
  date,
  jd,
  alt = 0,
  loc,
  calendar,
  timezone,
  dec,
  refraction,
  atm,
  temp,
  verbose = T
)

`obj`	(Optional) String containing name of the solar system body of interest. Can be any of the planets (inc. Pluto), the Moon, the Sun or the Ecliptic. Defaults to 'sun'.
`date`	Either a string containing the date in the format "YYYY/MM/DD" (see `timestring`), or a numeric containing the julian date (see `time2jd`). Can also be a single year ("YYYY") or a month ("YYYY/MM") to calculate risings and settings for every day in the year or month, respectively. Not necessary if jd is given.
`jd`	(Optional) A numeric containing the julian date (see `time2jd`) for which to calculate rising and settings. Only needed if date is not given.
`alt`	(Optional) The altitude of the horizon to consider. Defaults to zero degrees.
`loc`	Location, either a skyscapeR.object or a vector containing the latitude, longitude and elevation of location, in this order.
`calendar`	(Optional) Calendar used in parameter date. G for gregorian and J for julian. If not given the value set by `skyscapeR.vars` will be used instead.
`timezone`	(Optional) Timezone for output of rising and setting time either as a known acronym (e.g. "GMT", "CET") or a string with continent followed by country capital (e.g. "Europe/London"). See timezones for details. If not given the value set by `skyscapeR.vars` will be used instead.
`dec`	(Optional) Output declination: geo for the geocentric, or topo for the topocentric frame of reference. If not given the value set by `skyscapeR.vars` will be used instead.
`refraction`	(Optional) Whether atmospheric refraction is to be taken into account. If not given the value set by `skyscapeR.vars` will be used instead.
`atm`	(Optional) Atmospheric pressure for refraction calculation. If not given the value set by `skyscapeR.vars` will be used instead.
`temp`	(Optional) Atmospheric temperature for refraction calculation. If not given the value set by `skyscapeR.vars` will be used instead.#'
`verbose`	(Optional) Boolean to control whether or not to display text. Default is TRUE.

swe_calc_ut, swe_azalt

# Rising and setting of the sun on june solstice 2018, from the location of London
riseset('sun', '2018/06/21', loc=c(51.5, 0.11, 100))

# Rising ans setting of the moon on june solstice 2018, using a horizon profile
hor <- downloadHWT('HIFVTBGK') # Liverpool cathedral
riseset('moon', '2018/06/21', loc=hor)

# Rising and setting of the sun throughout February 1999, from the location of London
riseset('sun', '1999/02', loc=c(51.5, 0.11, 100))

## Not run: 
# Rising and setting of the sun throughout 3001 BC, from the location of London
riseset('sun', -3000, loc=c(51.5, 0.11, 100))

## End(Not run)