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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LO7MVDEBG2FNCRKU4N3XZAEKQPO63RUJ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "LO7MVDEBG2FNCRKU4N3XZAEKQPO63RUJ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O75APKTY2AMHYHHWGD5K7ZJDD3JZKKRN/?format=api",
    "sender": {
        "address": "oz9aec (a) gmail.com",
        "mailman_id": "f1e6940730164b749428fa5a4cf1d94a",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f1e6940730164b749428fa5a4cf1d94a/emails/?format=api"
    },
    "sender_name": "Alexandru Csete",
    "subject": "[amsat-bb] Re: ARISSat 1 & Funcube Telemetry Question: DBPSK vs BPSK",
    "date": "2011-02-06T19:35:31Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/O75APKTY2AMHYHHWGD5K7ZJDD3JZKKRN/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "On Sun, Feb 6, 2011 at 12:36 PM, Iain Young, G7III <[email protected]> wrote:\n> Hi All,\n>\n> Just a quick clarification needed by me on the Telemetry format that is\n> going to be used by ARISSat-1 and Funcube (& I guess the Funcube boards\n> onboard UKube-1...)\n>\n> Lots of places are referring to it as BPSK1000, but I have seen\n> references claiming it is DBPSK. Can someone clarify if it is\n> Differential BPSK, or \"just\" plain old BPSK as used before, but at 1000\n> BPS, rather than 400 ?\n>\n> Reason for asking is that I have a USRP, and use gnuradio, along with\n> the gnuradio-companion. That has DBPSK blocks built in, but pure BPSK\n> would take a little more work (possibly just routing the output to a\n> loopback soundcard, and then running decoding software)\n>\n\nHi Iain,\n\nIt is differentially encoded. You can find the specification on Phil\nKA9Q's website:\nhttp://www.ka9q.net/bpsk1000.html\nHe has also made his reference modem available under GPL:\nhttp://www.ka9q.net/demod2.tar.bz2\n\nThe package contains functional application that can send and receive\nBPSK1000. What I am still missing is description of the telemetry\nformat, i.e. how to translate the decoded data stream into engineering\nvalues. Is there such a document available?\n\n73\nAlex OZ9AEC\n",
    "attachments": []
}