equatorial2horizontal: Equatorial coordinates to Horizontal coordinates...

In Susarro/arqastwb: Archaeoastronomy algorithms

Description

Equatorial coordinates to Horizontal coordinates transformation

Usage

equatorial2horizontal(geographic_longitude, geographic_latitude,
  declination, right_ascension, jd = NULL, obliquity = NULL)

Arguments

geographic_longitude	Geographical longitude in degrees
geographic_latitude	Geographical latitude in degrees
declination	Declination in degrees
right_ascension	Right Ascension as hour angle
jd	Julian day used to determine true obliquity of ecliptic
obliquity	true obliquity of ecliptic. If null it uses jd to calculate it

Value

Horizontal coordinates

• azimuth Azimuth in degrees

• altitude Altitude in hour angle

Examples

geographic_longitude<-str2degrees("-77<c3><82><c2><ba>03'55.5\u0022")
geographic_latitude<-str2degrees("38<c3><82><c2><ba>55'17\u0022")
jd<-str2jd("1987-04-10T19:21:00")
declination<-str2degrees("-6<c3><82><c2><ba>43'11.61\u0022")
right_ascension<-str2hours("23:09:16.641")
equatorial2horizontal(geographic_longitude,geographic_latitude,declination, right_ascension,jd)

Susarro/arqastwb documentation built on May 21, 2019, 10:28 a.m.