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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HRGLZNHLZOOGQRHSTOTNGFF4NF2HXWVT/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "HRGLZNHLZOOGQRHSTOTNGFF4NF2HXWVT",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IE45QOWOUVBX3S4WZZS6KNBJHXYQ2AAM/?format=api",
    "sender": {
        "address": "n8phucjh (a) gmail.com",
        "mailman_id": "59819827ccdc4a7c8f5f6b44ab575bc7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/59819827ccdc4a7c8f5f6b44ab575bc7/emails/?format=api"
    },
    "sender_name": "Chris Hackworth",
    "subject": "[amsat-bb] Re: old satellites",
    "date": "2009-03-18T04:35:58Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IE45QOWOUVBX3S4WZZS6KNBJHXYQ2AAM/?format=api",
    "children": [],
    "votes": {
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        "status": "neutral"
    },
    "content": "Greetings,\n\nBit of a lurker here, but my day job is at a Satellite Earth station\nfor SES Americom, a satellite owner/operator.\n\nNormally, when a satellite is about to run out of  fuel, it is sent\ninto what is called a graveyard orbit, to keep it from drifting and\nrunning into other satellites. It is boosted high above the\ngeosynchronous belt where it wont run into anything.\n\nA satellite is usually hard wired for the frequencies in use. Up link\nin the C band is usually 5.9 to 6.4 Ghz, and there are 24 TWTs, each\ntuned to a 40 Mhz hunk of spectrum.So, Transponder 1 is the first 40,\ntransponder 2 is the second 40, etc....\n\nAt Ku band, it runs from 14 GHZ to 14.5 Ghz. sometimes the transponder\nwidth is 40mhz, sometimes it is 54Mhz. again, the individual TWT is\ntuned for its little slice.\n\nAll of this filtering is done pre and post amp by hard filters that\ncan not be changed from the ground.\n\nWithout command and control of the satellite, it is for all practical\npurposes useless.\n\nChris Hackworth\nN8PHU\n\n\nOn Thu, Mar 12, 2009 at 12:24 AM,  <[email protected]> wrote:\n> Hello\n> I believe this subject has been kicked around on this BB before.  It did generate some creative thinking.  Given  all the satellites up there and all the varied uses of them, eventually some of them get compromised for whatever reason.  Is there any way any of these old relics can be reprogramed, used or otherwise \"adjusted\" to suit us?  We don't need a real good S/N  ratio to make us happy, and we are pretty good at cobbling together whatever we want.  We have some very informed and smart people on this BB who know.\n> 73 Bob W7LRD\n> Seattle\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\n-- \nChris N8PHU\nET1(SW) USN (Ret)\nChief transmitter Heavy  SES-Americom\n\n",
    "attachments": []
}