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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FK5YYD3YJWJLZWC64M4NRGRCRQIC4DSV/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CAGD5MUH-K5dCyo=DL3Ut72yTXSoPDjtYGt5XX=gN-HnfmWRviQ@mail.gmail.com",
    "message_id_hash": "FK5YYD3YJWJLZWC64M4NRGRCRQIC4DSV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/Z3FSK7NHKKIVSRVAIPJ7FKLSFOL37VED/",
    "sender": {
        "address": "zryder94 (a) gmail.com",
        "mailman_id": "6e1fbabbea4b435c8d11571bfdfe2daa",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/6e1fbabbea4b435c8d11571bfdfe2daa/emails/"
    },
    "sender_name": "Mike Thompson",
    "subject": "Re: [amsat-bb] APRStk ? Or other?",
    "date": "2017-03-02T18:52:06Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JOCGWQ6IN5ZKH4U7FY4EZEDMRJ7DHM7A/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/P2NZKALTXDWHUEUXVMXOJQ3AKDEXYOZZ/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I wonder if it would be best to run 2 RTL's on a Rpi for use on both 144.39\nand on UHF for the ISS, or is it just as effective to run one.\n\nOn Thu, Mar 2, 2017 at 10:08 AM, Scott <[email protected]> wrote:\n\n> I was also concerned about that at first but on most passes I log a\n> significant number of packet receptions, so while adjusting for RX doppler\n> might help to some degree, it’s definitely not a deal-breaker.\n>\n> (I also learned not to judge your effectiveness by the number of packets\n> you iGate to ariss.net; it appears that duplicates only show up once.\n> So, to REALLY know how well you’re doing, check the log file on the iGate\n> or use an external app to monitor it on another PC)\n>\n> -Scott\n>\n>\n>\n> ------------------------------------------------------------\n> --------------------\n>\n>\n> From: Mike Thompson\n> Sent: Thursday, March 02, 2017 11:01 AM\n> To: Scott\n> Cc: [email protected]\n> Subject: Re: [amsat-bb] APRStk ? Or other?\n>\n> I wonder how hard it would be to get the raspberry pi to download TLE's\n> every now and then, and apply doppler correction to the downlink iGate\n> frequency. on 70cm, this might be a big deal.\n>\n> On Thu, Mar 2, 2017 at 9:56 AM, Scott <[email protected]> wrote:\n>\n>   Hey Dave.\n>\n>   It takes longer to read the instructions that it does to setup a\n> Raspberry Pi to be an iGate.\n>\n>   When the ISS digipeater changed to 70cm, there were not enough iGates so\n> I thought it might be fun to throw one together.  There are numerous\n> how-to's online, but this one is perhaps the most straight-forward:\n>\n>   https://github.com/wb2osz/direwolf/blob/master/doc/\n> Raspberry-Pi-SDR-IGate.pdf\n>\n>   ... unfortunately, the way the document was created you won't be able to\n> copy/paste commands.  But regardless, it's not a difficult process if you\n> have even the slightest familiarity with a Pi or linux in general.\n>\n>   Hope that helps!\n>\n>   -Scott,  K4KDR\n>   Montpelier, VA  USA\n>\n>\n>\n>   ------------------------------------------------------------\n> --------------------\n>\n>   -----Original Message----- From: Dave via AMSAT-BB\n>   Sent: Thursday, March 02, 2017 9:57 AM\n>   To: [email protected]\n>   Subject: [amsat-bb] APRStk ? Or other?\n>\n>   Hi All\n>\n>   I'm setting up an autonomous sat gate using a spare Kenwood TMD700. I\n> seem to remember that once upon a time there was a DOS program called\n> APRStk that could Doppler correct the TMD700.\n>\n>   Does anyone know of a more up to date alternative that would run on a Pi\n> or Pi Zero?\n>\n>   Regards\n>   Dave EI4HT / M0GIW\n>\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n",
    "attachments": []
}