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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DUKZRQX7OF4PL3UEBSSUUDPYU5ARDG3D/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "DUKZRQX7OF4PL3UEBSSUUDPYU5ARDG3D",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RUIVHYKOE6NAUCAHEBFHHYE2U5LCGEJV/?format=api",
    "sender": {
        "address": "vk4tec (a) tech-software.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Andrew Rich",
    "subject": "Re: [amsat-bb] ISS ping box (now PBB",
    "date": "2016-09-23T17:20:09Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2KQZR7UQZFUUZIF22LRNVIBU2BVHBKNV/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "One of my missions is to get gnu radio running on my Mac\n\nI have airspy RTLSDR and perhaps lime SDR \n\nAndrew\n\n-----------------------------\nSent from my iPhone\nAndrew Rich\ne [email protected]\nw www.tech-software.net\nm 0419 738 223\n\n> On 24 Sep 2016, at 02:52, Edson W. R. Pereira <[email protected]> wrote:\n> \n> Hi Dani,\n> \n> I have been following with great interest the commissioning of BEESAT and\n> am looking forward to experiment with the digipeater onboard. Daniel,\n> EA4GPZ, has implemented a very nice modem for BEESAT in gnuradio (\n> https://github.com/daniestevez/gr-satellites). I have tested it with some\n> audio samples recorded by Jan, PE0SAT. It works very well.\n> \n> It would be very nice if a similar type of experiment could replace the\n> ancient AX.25 digipeater onboard the ISS.\n> \n> 73, Edson PY2SDR\n> \n> \n> ---\n> - We humans have the capability to do amazing things if we work together.\n> - Nós seres humanos temos a capacidade de fazer coisas incríveis se\n> trabalharmos juntos.\n> \n>> On Fri, Sep 23, 2016 at 10:59 AM, Dani EA4GPZ <[email protected]> wrote:\n>> \n>>> El 23/09/16 a las 14:22, Edson W. R. Pereira escribió:\n>>> What would be required (from the point of view of paper work, logistics,\n>>> approvals, etc.) to replace the current ISS packet radio TNC by a device\n>>> that would implement some more efficient digital communications? The\n>> device\n>>> could be a digipeater, but employing strong FEC and a more modern\n>>> modulation and framing structure and perhaps some better scheme for\n>> channel\n>>> access. Perhaps something similar to ngham.\n>>> \n>>> https://github.com/skagmo/ngham\n>>> \n>>> With FEC and higher speed, we could accommodate many more users on a\n>> single\n>>> pass. A dedicated software application on the ground would implement the\n>>> modem and process information -- separating different types of messages\n>> in\n>>> different screens, providing a chat like mode for real-time\n>> communications,\n>>> automatically forwarding APRS packets, etc.\n>>> \n>>> Am I day dreaming?\n>> \n>> Hi Edson,\n>> \n>> You're not daydreaming that much. The BEESAT satellites have a\n>> digipeater using the Mobitex-NX protocol, which has some form of FEC.\n>> \n>> Many other satellites on the Amateur bands transmit telemetry using\n>> strong FEC. For instance, AAUSAT-4 uses an r=1/2, k=7 convolutional code\n>> and (255,223) Reed-Solomon with CCSDS scrambling.\n>> \n>> Support and experimentation for these and many other protocols is very\n>> easy today using SDR.\n>> \n>> 73,\n>> \n>> Dani.\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> _______________________________________________\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": []
}