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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SE6IXYSD52IZECRM6MICZSYPB57Y7V6O/?format=api",
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    "message_id": "[email protected]",
    "message_id_hash": "SE6IXYSD52IZECRM6MICZSYPB57Y7V6O",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VJKFLEBPLP2RE57MGXPBVAM2T4LO4D4C/?format=api",
    "sender": {
        "address": "zleffke (a) vt.edu",
        "mailman_id": "57a24afb1cf641f98121841e6753c12e",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/57a24afb1cf641f98121841e6753c12e/emails/?format=api"
    },
    "sender_name": "Zach Leffke",
    "subject": "Re: [amsat-bb] Using JPL Horizons Ephemerides Data",
    "date": "2019-07-26T16:43:20Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZXBM53ZXSOYQFBJRIXVBGIVUGFMGHSAW/?format=api",
    "children": [],
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    "content": "Not an expert on this so will keep it short:\n\nWe had a student at VT look into this for tracking 'Deep Space' objects. \n  He figured out how to access the Horizons website via one of their \nAPI's (not sure which) and then figured out how to 'shoehorn' the data \ninto python scripts that used the 'pyephem' package.\n\npyephem has been deprecated and replaced by 'SkyField' and is wayyy more \npowerful and has support for things like an SGP4 propagator for \nsatellite tracking, and support for tracking astronomical objects (our \nmoon/sun for EME'rs on the list and for future Amateur Radio on the \nLunar Gateway, Jupiter+moons, other radio astronomy sources, etc....). I \nthink even directly supports this kind of thing through a 'jplephem' \npackage (where it gets the ephemeride data for planets, moons, etc...). \nSo might be as easy as download from Horizons (if not directly \naccessible in skyfield), load into skyfield.....yadda yadda yadda \n(seinfeld reference)......get pointing/doppler data for deep space objects.\n\nBottom line, for those interested in custom software, should look into \n'skyfield' to maybe work with this type of data in python (along with \nTLE data) and there's probably a way to 'export' the ephemerides into \nTLE format so that the results can be used to 'spoof' existing tracking \nprograms (technically, SGP4+TLEs are only valid for 'near earth' \ntracking, not even the right algorithm for Lunar/Solar tracking, that's \nwhy I say 'spoof').\n\nhttps://rhodesmill.org/skyfield/\n\n-Zach, KJ4QLP\n\nResearch Associate\nAerospace Systems Lab\nTed & Karyn Hume Center for National Security & Technology\nVirginia Polytechnic Institute & State University\nWork Phone: 540-231-4174\nCell Phone: 540-808-6305\n\nOn 7/26/2019 11:53 AM, Reid Crowe via AMSAT-BB wrote:\n> Looks like someone is already on it:\n> https://twitter.com/coastal8049/status/1154760899522994177\n> \n> 73,\n> \n> Reid N0RC\n> \n> On Fri, Jul 26, 2019 at 10:43 AM Reid Crowe <[email protected]> wrote:\n>>\n>> Is there a way to use (or convert) JPL Horizons Ephemerides data with\n>> tracking programs like SatPC32 that use Two Line Elements?\n>>\n>> 73,\n>>\n>> Reid N0RC\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n> \n",
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}