horizontal2equatorial: Equatorial coordinates to Horizontal coordinates...

In Susarro/arqastwb: Archaeoastronomy algorithms

Description

Equatorial coordinates to Horizontal coordinates transformation

Usage

horizontal2equatorial(geographic_longitude, geographic_latitude, azimuth,
  altitude, jd = NULL, obliquity = NULL)

Arguments

geographic_longitude	Geographical longitude in degrees
geographic_latitude	Geographical latitude in degrees
azimuth	Azimuth in degrees
altitude	Altitude in degrees
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")
azimuth<-248.0336941301
altitude<-15.1248736234
horizontal2equatorial(geographic_longitude,geographic_latitude,azimuth, altitude,jd)

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