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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/V6KOJFQDRDL2UGIZW3CNQCDKZN5FZWWZ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CALNQy49C_bV_XF4Fg8P=SXL1xrDYz-MW19c2Q2HS4u-gkUsTBw@mail.gmail.com",
    "message_id_hash": "V6KOJFQDRDL2UGIZW3CNQCDKZN5FZWWZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/KM7W7F7VWCXYGEZLKCEYYN4NUTUJI3SK/?format=api",
    "sender": {
        "address": "ewpereira (a) gmail.com",
        "mailman_id": "bf62ce620f5344f48e77dcfeab534e6d",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/bf62ce620f5344f48e77dcfeab534e6d/emails/?format=api"
    },
    "sender_name": "Edson W. R. Pereira",
    "subject": "Re: [amsat-bb] Need help decoding EO-79 packets.",
    "date": "2016-04-22T00:57:03Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YZCTDGOATRC3RCZTAEU6YHKBCVGDL5SC/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "A small correction:\n\nWhen I wrote destination callsign, I meant source (or digipeater) callsign.\n\n73, Edson PY2SDR\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\ntrabalharmos juntos.\n\nOn Thu, Apr 21, 2016 at 9:51 PM, Edson W. R. Pereira <[email protected]>\nwrote:\n\n> The AX.25 implementations used in some cubesats do not implement the specs\n> for AX.25 destination address field encoding correctly. The last bit of the\n> last byte of the destination callsing (or digipeater) field should always\n> be 1 in order to indicate the end of the destination field, but some\n> implementations keep the bit as 0. This is the reason UZ7HO's soundmodem\n> says NON-AX25 frame. Soundmodem does pass the frame to the KISS interface\n> but any decoding software must be careful during the processing of the\n> destination callsign (by assuming there are no digipeaters).\n>\n> Comparing the performance of the 1200 bps BPSK FUNcube-1 FEC encoding with\n> cubesats using AX.25 1200 bps BPSK makes me wander why in this day and age\n> we still use AX.25 for satellite links.\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 Thu, Apr 21, 2016 at 7:56 PM, J. Boyd (JR2TTS) <\n> [email protected]> wrote:\n>\n>> On Thu, 21 Apr 2016 17:43:36 -0500, \"JoAnne Maenpaa\" <[email protected]>\n>> wrote:\n>>\n>> > > There were some other things in my Soundmodem settings that did not\n>> > > agree with the instructions for DeorbitSail, that may have messed it\n>> up,\n>> > > so I'll try again this morning during the next pass.\n>> >\n>> > I'm continuing to experiment by myself on this subject of receiving\n>> > telemetry data using an SDR dongle and software. I've appreciated all\n>> the\n>> > bits of information offered by the stations who are already up and\n>> running.\n>> >\n>> > One thing I'm finding with software packet reception is that the\n>> software\n>> > \"modem\" or software \"TNC\" (i.e.: soundmodem) seems to expect packets\n>> with a\n>> > good checksum. Just a single bit-flip and I don't have data.\n>>\n>> In soundmodem, I had \"Bits Recovery\" set to \"SINGLE\" initially, while\n>> the DeorbitSail page seems to suggest it's more properly set to \"NONE\".\n>> Not sure if that's significant, but your comment about flipped bits made\n>> me suspect this. Anything's worth trying once.\n>>\n>>\n>> --\n>> J. Boyd, JR2TTS/NI3B\n>> [email protected]\n>> http://www.flickr.com/photos/the2belo/\n>> http://www.qrz.com/db/JR2TTS\n>> Twitter: @Minus2_C\n>>\n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership.\n>> Opinions 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>\n",
    "attachments": []
}