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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B7ZZSBZUZERGLFETQUJNDTIXUNOJWLWK/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "B7ZZSBZUZERGLFETQUJNDTIXUNOJWLWK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/U2OWL6423QR7TEBW5ZZBQ3KCF73N4GP7/?format=api",
    "sender": {
        "address": "pagreen (a) gmail.com",
        "mailman_id": "4363148167884637a2739295d276a98c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4363148167884637a2739295d276a98c/emails/?format=api"
    },
    "sender_name": "Patrick Green",
    "subject": "[amsat-bb] Re: Yes, DStar can work on LEO,",
    "date": "2007-02-27T03:37:47Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OPKKTQW5XHCX3IYX76WAIETQIWSZGODM/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VNAHD6KZJ7VZTY2BFP6GJ6R72LHWF5YK/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "It's GMSK modulation.  I don't have the spec in front of me but I doubt\nit'll run where there is any processing (preemphasis/deemphasis) is taking\nplace.  This is why I suggested using a linear transponder.  I realize that\nD-star equipment would be unfriendly to the current operations of sats being\nthat there is no continuous tuning D-Star radio currently so using this\nwould most certainly would drift into other QSO's in progress.  Along with\nthat problem you have the inability to full duplex the QSO because someone\nmentioned that the vocoder/decoder can be used only in one direction at a\ntime.  Seeing as this is a new mode and the equipment is expensive, I don't\nsee this being wildly popular that it'll \"take over\" the sats from their\nusual operation.  A test at some point in the future would probably be good\nto see if it can be done.  Perhaps Echo's B-side could be converted to pass\nGMSK modulation?  Something for the programmers to think about.\n\n73 de Pat --- KA9SCF.\nAmsat #35741\n\nOn 2/26/07, Tony Langdon <[email protected]> wrote:\n>\n> At 09:14 AM 2/27/2007, Andrew Glasbrenner wrote:\n> >Gentlemen,\n> >\n> >Please do not use FM on any of the transponder satellites, whether D-Star\n> or\n> >plain FM. FM of any kind is expressly unwelcome on AO-7 especially.\n> >\n> >If you would like to set up a test of D-Star via AO-51, please organize\n> the\n> >effort and send a request to schedule it to [email protected] or to\n> >myself directly and we will accommodate the test on a FM satellite, where\n> FM\n> >belongs. I think it'd be an interesting experiment.\n>\n> Umm, I thought D-Star was a digital mode, not riding on top of\n> FM.  Is it transmitted as AFSK or is it modulated directly onto the\n> carrier?  If it's the latter, then it wouldn't work on an FM satellite.\n>\n> 73 de VK3JED\n> http://vkradio.com\n>\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",
    "attachments": []
}