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Diffstat (limited to '')
| -rw-r--r-- | info/blueshift.texinfo | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index 423c24f..3afd3e3 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -811,7 +811,7 @@ Returns the current time in POSIX time. Returns the current time in Julian Day time. @item julian_centuries() -Returns the current time in Julian Centuries time. +Returns the current time in Julian Centuries time (100 Julian days since J2000.) @item radians(deg) Converts from degrees to radians. @@ -819,17 +819,40 @@ Converts from degrees to radians. @item degrees(rad) Converts from radians to degrees. -@c TODO : these could be documented (in the source code as well) @item sun_geometric_mean_longitude(t) +Calculates the Sun's geometric mean longitude, in radians. + @item sun_geometric_mean_anomaly(t) +Calculates the Sun's geometric mean anomaly, in radians. + @item earth_orbit_eccentricity(t) +Calculates the Sun's the Earth's orbit eccentricity. + @item sun_equation_of_centre(t) +Calculates the Sun's equation of the centre, the difference +between the true anomaly and the mean anomaly, in radians. + @item sun_real_longitude(t) +Calculates the Sun's real longitudinal position, in radians. + @item sun_apparent_longitude(t) +Calculates the Sun's apparent longitudinal position, in radians. + @item mean_ecliptic_obliquity(t) +Calculates the mean ecliptic obliquity, in radians, +of the Sun's apparent motion without variation correction. + @item corrected_mean_ecliptic_obliquity(t) +Calculates the mean ecliptic obliquity, in radians, +of the Sun's apparent motion with variation correction. + @item solar_declination(t) +Calculates the Sun's declination, in radians. + @item equation_of_time(t) +Calculates the equation of time, the discrepancy between +apparent and mean solar time, in degrees. + @item hour_angle_from_elevation(latitude, declination, elevation) Calculates the solar hour angle from the Sun's elevation. |