Hi Norm,
RAAN = right ascension of the ascending node
http://www.amsat.org/amsat/keps/kepmodel.html#raan
73 Mike Dk3WN
-----Ursprüngliche Nachricht----- Von: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] Im Auftrag von Lizeth Norman Gesendet: Freitag, 24. Januar 2014 10:00 An: <,amsat-bb@amsat.org>, Betreff: [amsat-bb] G3RUH plan 13 algorithm help
*HI all,Found this at this page:http://www.amsat.org/amsat/articles/g3ruh/111.html http://www.amsat.org/amsat/articles/g3ruh/111.htmlOrbit Plane:* Fixed (almost) with respect to the stars, in orientation defined by argument of perigee, inclination and RAAN. Origin: Earth's centre. X: Directed towards perigee Y: 90 degrees from perigee round the orbit in direction of satellite's motion Z: Perpendicular to orbit plane I think I understand most of the math in the algorithm. In the above context, what does RAAN mean? Sorry for being obtuse! Norm n3ykf _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb