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.html>Orbit 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
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--
Gus 8P6SM
The Easternmost Isle
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