./
sam_ab_to_ll.pro
top source sam_ab_to_ll
utility
sam_ab_to_ll, jd, alpha, beta, lat=lat, lon=lon [, r_1au=r_1au] [, b0=b0]
Given a time, alpha angle, and beta angle from the center of the solar disk, calculate the corresponding heliocentric latitude and longitude. Both take into account B0 "nodding" of Sun
Parameters
- jd in required
Julian Date of observation, UTC, TAI, TT, doesn't matter. This function is not accurate enough to differentiate.
- alpha in required
Horizontal angle from center of solar disk, arcmin, positive east "left" on published sam images
- beta in required
Vertical angle from center of solar disk, arcmin, positive north "up" on published sam images
Keywords
- lat out required
Heliocentric latitude in degrees
- lon out required
Heliocentric longitude in degrees, 0deg through sub-earth point
- r_1au out optional
Distance from Earth to Sun in km.
- b0 out optional
Heliocentric latitude of sub-earth point. "Nodding" angle of Sun as viewed from Earth, positive when north pole of Sun is tilted towards Earth.
File attributes
Modification date: | Tue Sep 11 18:57:04 2012 |
Lines: | 78 |
Docformat: | rst rst |