From c4a3678894495beae1c32dcd552324fa562a3009 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 24 Feb 2014 11:29:16 +0100 Subject: doc solar functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- info/blueshift.texinfo | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) (limited to 'info/blueshift.texinfo') 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. -- cgit v1.2.3-70-g09d2