Documentation for /eve_analysis/ssw/ssw/sdo/eve/idl/

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sam_ll_to_ab.pro


top source sam_ll_to_ab

utility

sam_ll_to_ab, jd, lat_, lon_, alpha=alpha, beta=beta

Given a time, heliocentric latitude and longitude of point on Sun, calculate the corresponding alpha angle, and beta angle from the center of the solar disk. 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.

lat_ in required

Heliocentric latitude in degrees

lon_ in required

Heliocentric longitude in degrees, 0deg through sub-earth point

Keywords

alpha out required

Horizontal angle from center of solar disk, arcmin, positive east "left" on published sam images

beta out required

Vertical angle from center of solar disk, arcmin, positive north "up" on published sam images

File attributes

Modification date: Tue Sep 11 20:48:09 2012
Lines: 49
Docformat: rst rst