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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IEEAGW77NRYBF7YESZJE5NH5Z5HCSOEM/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "IEEAGW77NRYBF7YESZJE5NH5Z5HCSOEM",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PTMMNQ5I6OULK2FFBIUES5NDQWQCH6NA/?format=api",
    "sender": {
        "address": "davegoncalves (a) gmail.com",
        "mailman_id": "f97ac5d9d47c4e819df184cb1822b3a7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f97ac5d9d47c4e819df184cb1822b3a7/emails/?format=api"
    },
    "sender_name": "David Goncalves",
    "subject": "[amsat-bb] Re: Receiving RAFT on 216.98 MHz ?",
    "date": "2006-12-07T22:05:53Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PTMMNQ5I6OULK2FFBIUES5NDQWQCH6NA/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Doug,\n\nIf you look at the description on the RAFT1 website, you will notice that the\nradar transponder, as it flies over the radar beam, will be downconverting the\n216.98 (+/- doppler shift) radar signal to an audio tone on the 2\nmeter downlink.\nThis is the intended way to hear the 'ping'. You must be well timed\nwith your receiver, as the radar transponder is on a 1 minute timer\nthat must be commanded on by a command station. Hopefully, following\ntesting, a schedule can be setup so that many folks get a chance to\ntry this radar transponder out.\n\nHeaingr the direct radar reflection 'ping' from off of the satellite\nbody is challenging for NAVSPASUR; for such a small cross section, I\ndon't know that it is likely that a amatuer would be able to do this -\nbut do try! Others may try hearing strong radar pings with the ISS,\nSpace Shuttle or other large orbiting bodies (like the moon!).\n\nLastly, one may listen to the 216.98 (+/- doppler shift) signal\ntransmitted from the radar transponder itself. There is no ping, just\na CW tone. AA2TX and others have determined that one may hear the 6mW\nCW signal with a good omnidirectional antenna and a reasonably quiet\nand sensitive receiver. A small group of us in the Boston area that\nbuilt the transponder eagerly await the launch, release and testing of\nthe satellite to listen to our creation. We are using a preamp, as a\nweak signal will not impress my girlfriend :-)\n\nPersonally, I've a IC-375 220 allmode to hear it, but I live in a very\npoor location for satellite reception. :-( One could also purchase and\nrework a Hamtronics downconverter to use their 2M radio to hear the\nsignal. Hurry - the satellite will not be in orbit for long...\n\nHope this helps.\n\nDavid Goncalves\nW1EUJ\n\nOn 12/7/06, Douglas Quagliana <[email protected]> wrote:\n> A quick check around my radio shack confirms\n> that none of my receivers will receive at or\n> near 216.980 MHz.\n>\n> What were other amateurs planning to use to\n> receive the pings from RAFT on 216.98? Is\n> there a bargain-basement no-frills way to\n> kludge something together to receive the\n> signals?\n>\n> Douglas KA2UPW/5\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-- \nDavid Goncalves\n",
    "attachments": []
}