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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WX34AZO2KHTE4WL3KI4Y7AV6PKU6GWC6/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "WX34AZO2KHTE4WL3KI4Y7AV6PKU6GWC6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/4CKYUAQZT4KUDGYIXC7SWJTLGRM7SZV6/?format=api",
    "sender": {
        "address": "nate (a) natetech.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Nate Duehr",
    "subject": "[amsat-bb] Re: geo stationary bird",
    "date": "2007-10-31T21:17:41Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UVG4WOOVVWMDVYBYD5RQOG5UJPPA5C62/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Bob Stewart wrote:\n> I was thinking the same thing.  One of the things that brought\n> me back into ham radio was the challenge and new experiences.\n> But a geosat sounds like it would be nothing more than\n> an internet chatroom - all it takes is a connection.  Don't get me\n> wrong, it will be great for EMCOMM.  But, other than that, meh.\n> \n> Bob\n\nThe challenge with geosat birds due to the higher orbit (distance) and \nwhat not, is in how ACCURATELY you can send the proper uplink signal \ninto the bird without trying it first.\n\n(GRIN... can you calculate your uplink gain to the geosync belt \naccurately enough to send the right signal level up the first time?)\n\nSure, it's a one-time trick pony... but it's still a nice little math \nand knowledge of your own system setup kind of challenge.\n\nI'm sure there'll be plenty of people blowing away the uplink and/or not \nheard until some folks do the math for them.  :-)\n\n(Thus, LEILA on AO-40... when really, if people were doing their math \nhomework and measuring their systems ahead of time -- she shouldn't have \nbeen necessary -- right?  There's always challenges available in RF \nsystems if you look for them...)\n\nAsk the 70's and 80's TV folks if uplink power into the video bird's \ntransponders was important!  (GRIN)\n\nThey have some good war-stories of remote trucks blowing away whole \ntransponders while the control rooms yelled at them on the phone to \nknock it off.\n\n(Nowadays, the TV folks use automated systems that set their uplink \npower automatically from the control rooms that use a data channel from \nthe control room through the birds that the truck systems monitor, \nunless that's changed since I last saw one in action.)\n\nWouldn't that be nifty?  A server/automated system that can \"see\" the \nbird via it's own receivers, and could command the uplink power \nautomatically from mobile ham's stations so uplink tuning/aiming and \npower levels for portable stations could be automated?\n\nNow, there's a challenge for ya!\n\nAnd of course, since it's hams here, and not commercial companies that \nhave control over the uplink equipment, it'd have to be a very flexible \nsystem, and be designed in such a way so that hams could assemble/build \nit on their own (like hams like to do) or if they're a little more lazy \nor too busy, they might be able to buy a pre-built box that someone else \nassembled, with connectors for various radios and trackers...\n\n(Sounds like too big a project, but might be fun to try to go do on a \nlimited basis by limiting which trackers and radios are supported.)\n\nAutomated anti-QRM... neat-o!\n\nThere's always cool stuff to try to do on ham radio!  :-)\n\nNate WY0X\n",
    "attachments": []
}