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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BAWM7HFSQXIKXPP4VPPC4OLW6A47DJ2B/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CBB2346C58D9B14983E5AEFE4B345886011137565312@NDJSSCC01.ndc.nasa.gov",
    "message_id_hash": "BAWM7HFSQXIKXPP4VPPC4OLW6A47DJ2B",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HYXAJJYIVBG2NRGXWSUTQ63KDTTBLPSL/?format=api",
    "sender": {
        "address": "kenneth.g.ransom (a) nasa.gov",
        "mailman_id": "7a18787420f848ee95993e164e807c2c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/7a18787420f848ee95993e164e807c2c/emails/?format=api"
    },
    "sender_name": "Ransom, Kenneth G. (JSC-OC)[BARRIOS TECHNOLOGY]",
    "subject": "[amsat-bb] Re: Satellite location prediction weeks away and JOTA",
    "date": "2012-09-20T11:00:54Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QXTFHM7L5FW6PQBBBVBQS4OJC3W3ZWJZ/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Predicting ISS out that far is more challenging than the other satellites as the ISS has frequent orbital maneuvers that most of the other amateur satellites do not. The significant factor affecting the other static amateur satellites is variations in orbital drag due to solar activity. ISS is much more dynamic being controlled by reboosts and occasionally maneuvered to avoid debris. Even the crew members moving around can cause subtle changes in the orbit.\n\nBest to use ISS predicts that far ahead as a ballpark estimate instead of a pinpoint prediction.\n\nKenneth - N5VHO\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On Behalf Of Gus 8P6SM\nSent: Thursday, September 20, 2012 12:23 AM\nTo: [email protected]\nSubject: [amsat-bb] Re: Satellite location prediction weeks away and JOTA\n\nOn 09/20/2012 12:42 AM, James Luhn wrote:\n> I will be working with a Boy Scout troop on October 20 participating\n> with JOTA (Jamboree On The Air). Is there an easy way to predict when\n> the various satellites and ISS will be passing overhead on October 20?\n> It would be nice to know the times and locations for October 20 weeks\n> ahead.\n\nTracking software should be able to give you an 'ephemeris' table for \neach pass for the day.  For example, the software I use lists FOUR \npasses on 20th October, for ISS.  The best of these is 11:59:20 to \n12:09:55 (nearly 13 minutes!).  If I drill down on that pass, it lists \ntimes, AZ/EL angles, range, doppler correction, etc, from AOS (314°/0°) \nthru TCA (233°/40°) to LOS (157°/0°) in increments of 30-40 seconds.  I \nwould expect any halfway decent tracking software should be able to give \nthe same sort of info.\n\nSo, tell us what software you want to use, ande maybe someone who uses \nthat particular software can tell you how to get the ephemeris info for \nthe particular date, QTH and satellite(s) you want.\n\nBut consider that \"weeks ahead\" means that you are using elements that \nare weeks old!  (Or, they will be, weeks from now when you need to use \nthe data.)  So any ephemeris data generated \"weeks ahead\" should be \nregenerated periodically as new elements become available, so your \nephemeris becomes more accurate the closer you get to the date of interest.\n-- \n73, de Gus 8P6SM\nThe Easternmost Isle\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": []
}