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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UNOYJ4VJALPZSAJ2HEKBQHLBQQ3DK3A5/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "000701cea766$c25fbcc0$471f3640$@net",
    "message_id_hash": "UNOYJ4VJALPZSAJ2HEKBQHLBQQ3DK3A5",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/UNOYJ4VJALPZSAJ2HEKBQHLBQQ3DK3A5/?format=api",
    "sender": {
        "address": "saguaroastro (a) cox.net",
        "mailman_id": "a4a1e7d14c254c03bd1ba487c7a01f6d",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/a4a1e7d14c254c03bd1ba487c7a01f6d/emails/?format=api"
    },
    "sender_name": "Rick Tejera",
    "subject": "[amsat-bb] Re: Polar Tracking LEO Satellites ... ?",
    "date": "2013-09-01T22:58:11Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Rob,\n\nSee my article in the April/May issue of the AMSAT Journal. While not\nmotorized, I'm sure it can be easily adapted to be motorized. \n\nThe basis is a simple Equatorial telescope mount.\n\nIf you need a copy let me know. \n\nRick Tejera (K7TEJ)\nSaguaro Astronomy Club\nwww.saguaroastro.org\nThunderbird Amateur Radio Club\nwww.w7tbc.org\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Rob\nSent: Sunday, September 01, 2013 3:38 PM\nTo: [email protected]\nSubject: [amsat-bb] Polar Tracking LEO Satellites ... ?\n\nI'm looking to put together a quick an easy portable tracking system for LEO\nbirds .... maybe something for field day use or an ISS school contact ....\n\nBasically looking to do polar tracking with one rotor and a manual set\ndeclination angle ....\n\nThoughts are:\n\n- rotor that can swing 180 degrees (-90,+90)\n- set the rotor to the half way point (0 degrees)\n- position the whole apparatus so that it's pointing at the azmith and\nelevation of the highest point on the pass\n- position the rotor to -90 for a west to east pass or +90 for a east to\nwest pass\n- calculate the length of the pass and time the rotation so it sweeps 180\ndegrees in that period\n\nI'v been googling this topic till my eyes cross .... saw some data about\nfolks trying to do polar tracking of Ao-40 a while back ... but that was a\ntad different considering Ao-40 is (was) in a high elliptical orbit ...\n\nDoes anyone have advice ... or a link to some data .... calculations ...\nlike how to convert az/el to something like (but not) declination/ra ????\n\nThanks,\n\n--> Rob, KA2PBT\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}