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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/I4RPUK3G433A4SZNCURJEXRGQOUDAA5W/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "I4RPUK3G433A4SZNCURJEXRGQOUDAA5W",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QGKIKFW4WAASHZTTLYQFCARV6B7LMU7D/?format=api",
    "sender": {
        "address": "vk4tec (a) tech-software.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Andrew Rich",
    "subject": "Re: [amsat-bb] Global Geo SATCOM system?",
    "date": "2016-10-07T07:21:29Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4QZVHC62NLHN3DT65WKHFJ6CUKLL4DBF/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YU3FE5OKGFDWBVQBO4DUS6VZHP4KS66O/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Ok not you have got me REALLY interested \n\nPlease tell me about your setup\n\nAndrew \n\n> On 7 Oct 2016, at 15:28, Scott <[email protected]> wrote:\n> \n> I have a couple of additional pieces of information to pass along on this\n> topic as of tonight.\n> \n> As many are aware, the Outernet hardware \"package\" consists of a patch\n> antenna, LNA, and unmarked SDR with bias-T enabled.\n> \n> Tonight I remembered that some time ago I could not resist buying a couple\n> of the second (?) generation metal-case RTL-SDR dongles from rtl-sdr.com.\n> I have been using one on my linux computer but the other one was unused.\n> Remembering that these rtl-sdr dongles had 5v bias-T as an option, I took\n> the unused one apart and soldered the appropriate pins to enable the\n> bias-T.  That allowed me to do a comparison with the unmarked SDR that came\n> with the other Outernet items.\n> \n> Setting Outernet aside for a moment, I did an apples to apples comparison\n> of the L-Band AERO signals coming from Inmarsat 4-F3.  The difference in\n> signal strength was obvious and substantial.  The rtl-sdr gave me over 10db\n> more SNR, so in addition to the 600 & 1200 AERO data streams, I could now\n> easily decode the 10k AERO signals where there is a lot more (and more\n> interesting) traffic.\n> \n> So with that test complete and fairly conclusive, I reconnected everything\n> to the Raspberry Pi but with the rtl-sdr dongle this time.  Not\n> surprisingly, the L-Band Outernet signal was also greatly improved.  Where\n> my SNR figure had been around 3, with the rtl-sdr dongle it was varying\n> between 6 & 8.  Please keep in mind that I do not have a clear sky view, so\n> take all of these findings with that in mind.\n> \n> A few minutes after powering up the Pi and seeing the improved SNR figure,\n> content from the satellite started downloading.  As you might expect, the\n> rate seemed to be noticeably quicker than before.\n> \n> Imagine my surprise to see the first file arrive as a .tgz compressed\n> archive that, when extracted, contained some amateur radio content!  Here\n> are the first few lines from the file that just arrived:\n> \n> ==========================\n> OUTERNET>APRS:>OUTERNET file created Fri Oct  7 05:00:19 UTC 2016\n> VI50CC>APRS,RS0ISS*,qAR,ZL4JL-6::RS0ISS   :Hello ZL   James G/day Mate\n> RS0ISS>CQ,qAS,ZL1KM-H:>ARISS - International Space Station\n> K6PKL>CQ,RS0ISS*,qAS,KK6RKY:=3748.51N/12112.44W-Solar powered, 20 watts\n> j-pole {UIV32N}\n> KK6OTJ-7>DE1QYT,RS0ISS*,qAS,KK6RKY:`.BJl tK\\>CQ CQ CQ ALL LIVE OPERATORS\n> PLEASE REPLY  =\n> KK6OTJ-7>DE1QYT,RS0ISS*,qAS,KK6RKY:`.BJl\"@K\\>CQ CQ CQ ALL LIVE OPERATORS\n> PLEASE REPLY  =\n> KK6OTJ-7>DE1QYT,RS0ISS*,qAS,KK6RKY:`.BJl\"cK\\>CQ CQ CQ ALL LIVE OPERATORS\n> PLEASE REPLY  =\n> RS0ISS>CQ,qAS,KK6RKY:>ARISS - International Space Station\n> ==========================\n> \n> ... and it continued with similar APRS type traffic.\n> \n> So, if my finding is any example, if anyone would like to optimize their\n> Outernet reception, or for that matter ANY L-band reception, you can do it\n> without dedicating one of the expensive SDR's to this function.  The\n> metal-case rtl-sdr dongle with bias-T enabled was an excellent step up in\n> performance for me.\n> \n> -Scott,  K4KDR\n> \n> =============\n> =============\n> \n> On Wed, Oct 5, 2016 at 6:51 PM, Robert Bruninga <[email protected]> wrote:\n> \n>> AMSAT tinkerers?\n>> \n>> OUTERNET is a free worldwide Geostationary Satellite downlink system\n>> designed to bring content to remote areas all over the globe.  They have\n>> six geostationary birds covering the entire globe EVERYWHERE.  All you need\n>> is a small 18” (or 36” in some very remote areas) to receive content via\n>> your own home-made receiver based on a TV dongle and Rasberry Pi.\n>> \n>> Is there anyone on AMSAT-bb that is already receiving this content?  We’d\n>> like to hear about how easy it is to set up a receiver.\n>> \n>> We have some ideas on how this can be used to augment Ham radio in our\n>> Emergency Response and remote operations missions.  See\n>> http://aprs.org/outnet.html\n>> \n>> Bob, WB4APR\n>> \n>> \n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of 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": []
}