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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SI2WM557V7L42C7NV4S5JLPU73HJAQ5S/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "SI2WM557V7L42C7NV4S5JLPU73HJAQ5S",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7FUVE5ZRIAGR5GCMNDLGYW3MIAWKIDR4/",
    "sender": {
        "address": "gus (a) 8p6sm.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Gus",
    "subject": "[amsat-bb] Re: G3RUH plan 13 algorithm help",
    "date": "2014-01-24T12:33:53Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QNGYCCKXKDCVHBFHTUY2HGD6FIE2MFMT/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Yes, but one thing I've never quite understood was how to convert RAAN \ninto Longitude.  All the neat explanations on non-earthly frames of \nreference and vernal equinoxes stop short of explaining how to start \nwith RAAN (in a set of elements) and compute forward in time from the \nepoch to get the longitude of the ascending node of the current orbit. \nAnyone with a link to an online resource that can help make this clear?\n\nOn 01/24/2014 05:38 AM, David Johnson wrote:\n> HI,\n>\n> Right Ascention of the Ascending node.\n>\n> The point in the orbit at which it crosses the equator going northbound.\n>\n> Here 's a good example:\n>\n> http://www.pe0sat.vgnet.nl/satellite/\n>\n> 73\n>\n> Dave, G4DPZ\n>\n> On 24/01/14 08:59, Lizeth Norman wrote:\n>> *HI all,Found this at this\n>> page:http://www.amsat.org/amsat/articles/g3ruh/111.html\n>> <http://www.amsat.org/amsat/articles/g3ruh/111.html>Orbit Plane:* Fixed\n>> (almost) with respect to the stars, in orientation defined by argument of\n>> perigee, inclination and RAAN.\n>> Origin: Earth's centre.\n>> X: Directed towards perigee\n>> Y: 90 degrees from perigee round the orbit in direction of satellite's\n>> motion\n>> Z: Perpendicular to orbit plane\n>> I think I understand most of the math in the algorithm. In the above\n>> context, what does RAAN mean?\n>> Sorry for being obtuse!\n>> Norm n3ykf\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the author.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite\n>> program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n>\n\n-- \nGus 8P6SM\nThe Easternmost Isle\n",
    "attachments": []
}