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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3VZVSFP6PAEBYZV3Z2XPBQCJZ2Q2QBCU/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "3VZVSFP6PAEBYZV3Z2XPBQCJZ2Q2QBCU",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PQPBTQR25HT6SBNGIZFHIV2BPNHD5GSV/",
    "sender": {
        "address": "wjubbels (a) gmail.com",
        "mailman_id": "3d3f4b2ab73749eea150ce913c522e3d",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/3d3f4b2ab73749eea150ce913c522e3d/emails/"
    },
    "sender_name": "Wouter Jan Ubbels",
    "subject": "[amsat-bb] Re: DO-64/Delfi-c3 telemetry",
    "date": "2008-10-17T07:28:47Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PQPBTQR25HT6SBNGIZFHIV2BPNHD5GSV/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B33H5VADB6IAWO6WTQXHUFJNYC6ZPKSR/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi David,\n\nyes, we have received your telemetry, thanks a lot for that!\nthe 145.870 and 145.930MHz are separate transmitters (which are only\ncombined just before the antennas), they are connected to the same\ndatabus from the On Board Computer.\nThe drop out issue is not an issue with one of the transmitters\nitself, but is related to the databus mentioned above, and it occurs\nwhen large volumes of data are transferred. (And it is not dependent\non which transmitter is on).\nDelfi-C3 is currently in basic mode, in which the datavolume no the\nbus is relatively low since no payload data is gathered from the\npayloads, in fact, the payloads are switched off, causing the dropout\nissue not to occur (and it also does not occur in transponder mode).\nThis is why the downlink is still on when the satellite is over your\nqth down under hi:)\n\n73 on behalf of the Delfi-C3 / DO-64 team,\n\nWouter Jan Ubbels PE4WJ\n\n\nOn Fri, Oct 17, 2008 at 12:57 AM, David Giles <[email protected]> wrote:\n> Hello All,\n>\n> Just decoded my second set of telemetry from DO-64.  So far I have heard\n> the 145.870 beacon every pass.  Unlike during the first 3 months when it\n> was heard 1 pass in 10.\n>\n> A question for the designers - are the two beacons separate transmitters\n> or just separate feeds to the one transmitter?  The 145.870 is far more\n> reliable.\n>\n> 73 de David VK5DG\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": []
}