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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OJITA7TXURY24SQZDRLFYCDB3SDF4Q4V/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "OJITA7TXURY24SQZDRLFYCDB3SDF4Q4V",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IIHD76V6A3STYKXOQGLTQFB2S7ZOJ5QY/?format=api",
    "sender": {
        "address": "pavelmc (a) gmail.com",
        "mailman_id": "61e7a12918924480a4c91c923f264389",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/61e7a12918924480a4c91c923f264389/emails/?format=api"
    },
    "sender_name": "Pavel Milanes Costa",
    "subject": "Re: [amsat-bb] APRS satellite dual hop",
    "date": "2018-11-09T19:54:50Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GSA7CKKXHJ5FD7TAE44KEXULDOKA4MAO/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Both Footprints must kiss or better overlap.\n\n73 CO7WT\n\nEl 9/11/18 a las 14:01, E.Mike McCardel escribió:\n> Bob,\n>\n> How close would the two satellites need to be with each other to hear each other?\n>\n> EMike McCardel, AA8EM\n> Senior Editor AMSAT News Service\n> Past AMSAT-NA VP Educational Relations\n>\n>\n>> On Nov 8, 2018, at 4:25 PM, Robert Bruninga <[email protected]> wrote:\n>>\n>> My bad.  I misread it as a dual hop.  The dual *s put in by some TNC's\n>> confused me.\n>>\n>> Here is how a 2 hop packet transmitted as ARISS,ARISS would look on the\n>> downlink in a normal TNC:\n>>\n>> PSAT,ARISS,RS0ISS* going one way or   (least likely)\n>> RS0ISS,PSAT,ARISS* going the other      (more possible)\n>>\n>> And remember, no one will find these on the ARISS or PSAT downlink pages\n>> because most likely only the first hop will be captured and the second hop\n>> will be rejected as a dupe.\n>>\n>> That is why everyone should always watch the downlink live if they want to\n>> capture one of those rare 2-hop APRS packets.\n>>\n>> HERE IS HOW TO DO IT:\n>>\n>> Challenges: Since PSAT has only a 0.2W transmitter, the ISS is simply\n>> never going to hear it.  But the chance of PSAT hearing the ISS is 20\n>> times better.  SO the best chance of success is via ISS first then PSAT.\n>> But if they both hear the uplink packet, then PSAT will be transmitting at\n>> the same time ISS is and so a dual hop is blocked.\n>>\n>> So here is the best scenario for dual hop success:\n>>\n>> 1) Transmit stations via ARISS,ARISS on one continent hitting only ISS and\n>> NOT hitting PSAT at same time\n>> 2) PSAT in footprint of ISS but also over mostly ocean so it might hear\n>> ISS without lots of user QRM\n>> 4) Receiving station on a distant continent looking out over water towards\n>> PSAT.\n>>\n>> Then chances could be good.  Notice, the transmitting stations can be any\n>> users as long as they are using the ARISS,ARISS path.  So the only person\n>> that has to do any planning is simply coastal receiving stations.\n>>\n>> With both ISS and PSAT now operational, this would be a good time for all\n>> users to be using the transmit dual hop path of ARISS,ARISS to maximize\n>> someone else on some other continent receiving them!\n>>\n>> -----Original Message-----\n>>\n>>> Fm N0AN-10 To CQ Via PSAT*,ARISS* <UI pid=F0 Len=43 >[14:50:57]\n>>> =4206.15N/09402.30W`73 v. ISS de Hasan N0AN\n>>>\n>>> Fm WD9EWK To APK002 Via PSAT*,ARISS* <UI pid=F0 Len=21 >[14:51:11]\n>>> :N0AN-10  :hi dm43{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> 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",
    "attachments": []
}