Yes, but one thing I've never quite understood was how to convert RAAN into Longitude. All the neat explanations on non-earthly frames of reference and vernal equinoxes stop short of explaining how to start with RAAN (in a set of elements) and compute forward in time from the epoch to get the longitude of the ascending node of the current orbit. Anyone with a link to an online resource that can help make this clear?
On 01/24/2014 05:38 AM, David Johnson wrote:
HI,
Right Ascention of the Ascending node.
The point in the orbit at which it crosses the equator going northbound.
Here 's a good example:
http://www.pe0sat.vgnet.nl/satellite/
73
Dave, G4DPZ
On 24/01/14 08:59, Lizeth Norman wrote:
*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
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