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GET /hyperkitty/api/list/[email protected]/email/THPIHHANXFDTQOXZO3LIQ5YAQRGC5CU6/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/THPIHHANXFDTQOXZO3LIQ5YAQRGC5CU6/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "THPIHHANXFDTQOXZO3LIQ5YAQRGC5CU6", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RJRBBEQ5TZQVS5WULMUJILG3CB7VF54Z/?format=api", "sender": { "address": "robert.machale (a) yahoo.com", "mailman_id": "46e6b85af97e4043be040e7aded959ab", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/46e6b85af97e4043be040e7aded959ab/emails/?format=api" }, "sender_name": "Robert MacHale", "subject": "Re: [amsat-bb] How to digipeat?", "date": "2019-09-08T06:00:43Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KRB4ZVIO37WDPEMVOLWG45VMMP4JPTN5/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YJ2L2BHTDBT7BUZBCKPAKL5UTCBWDC5T/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "What is the callsign for IO-86 telemetry beacons?\n\nDue to the equatorial orbit I never hear it in California.\n73\nRobert MacHale. KE6BLR Ham Radio License. http://spaceCommunicator.club/aprs \n. Supporting Boy Scout Merit Badges in Radio, Robotics, and Space Exploration\n\n \n\n On Saturday, September 7, 2019, 01:40:06 PM PDT, Scott via AMSAT-BB <[email protected]> wrote: \n \n Hi Hans!\n\nLike any digital mode, 1200 or 9600 packet requires several things to work\ntogether using the correct settings. This might run a little long, but\nI'll be glad to outline them.\n\nBut first, one helpful thing to remember is that you want to treat the\nuplink & downlink as completely separate affairs. Depending on the\nsatellite, the uplink and downlink might find you using different bands,\ndifferent radios, different antennas, different software... at a MINIMUM\nyou'll be using different RF frequencies even if it's a simplex packet\ndigipeater since the doppler compensation will be opposite for up -vs-\ndown. (caveat - on 2m normal FM you can get by with sitting on one freq)\n To me it's always made sense to verify that you're 100% good to go on the\ndownlink, then set yourself up for the uplink.\n\nSo, if anyone wants to read on, here are the things to consider.\n\nRF: you'll need to know what the uplink & downlink RF frequencies are and\nif either is in the 70cm band, doppler compensation is mandatory. Here's a\ntip: several of the newer sats are using NARROW-FM... even if you're\nworking on 2 meters, doppler compensation to/from a narrow-band satellite\nradio is making a huge difference in my experience. CAT control your radio\nif possible; if not, then pre-program 5 memory channels the way most people\nhave their FM radios setup for voice satellite work.\n\nMOD/DEMOD: your radio needs to have a connection to your computer where\nyou run software set to decode the type of modulation in use by the\nsatellite. On Windows, the various UZ7HO Soundmodem versions provide\nperhaps the easiest interface to work with. Direwolf is an option on\nWindows, too, and by-the-way makes for a very easy to use iGate utility\nrunning off to the side of your screen. On linux, Direwolf is the most\npopular option to my knowledge. On either platform, of course we have to\nfind out from the satellite documentation what settings are required. A\ncritical note that often prevents success on rates above 1200 baud is that\nbeyond that speed we need more audio bandwidth than is normally available\nfor general listening. So, whether you're using a \"real\" radio or an SDR,\ngood rules of thumb are 3KHz of audio bandwidth for 1200 baud and 15KHz of\naudio bandwidth for the higher rates. On modern radios, that means using a\nconnection to the radio's \"DATA\" port for rates above 1200. My TM-V71A,\nfor example, also has a menu option to switch between 1200 & 9600 - very\nimportant!\n\nUSER INTERFACE: as you mentioned, the UISS software is a great tool to use\nas the interface when sending/receiving the packet modes. It communicates\nwith UZ7HO Soundmodem or Direwolf to send/receive data to/from the\nsatellite. But what to transmit? We need that info from the satellite\ndocumentation. The \"TO\" is most often \"CQ\", but read everything you can\nfind about the satellite in question to be sure. (hint: monitor the\ndownlink & see what others are using!) The \"VIA\" can be confusing because\nmany sats will respond to more than one name. It all comes down to the\ndocumentation - historically the 1200 baud APRS sats will answer to \"ARISS\"\nwhich is handy... you don't have to change all your settings between\nsatellites. FalconSat-3 is different; we use \"PFS3-1\" when transmitting to\nFS-3. \"If\" there actually is an active digipeater on BugSat-1, the team\nhas instructed us to use \"LU7AA\" as the call sign to access that satellite.\n(I've tried BugSat-1 twice now but at the time of this post, have not had\nany success) As for the payload text to transmit, UISS helps a lot (for\nAPRS sats) by guiding us into sending properly formatted 'TEXT',\n'POSITION', and 'MESSAGE' type APRS packets. Monitoring the downlink and\nseeing what message types others are having success with is helpful here.\nHeck, everything I do on the sats is a copy-cat of the operating techniques\nused by the operators that you see post repeatedly here, on Twitter,\nQRZ.com, and elsewhere. A huge 'thank-you' to all who share how-to info!\n\nSo, aside from individual considerations that are unique to particular\nsatellites (FS-3 is cross-band full-duplex, for example), that is an\noverview. If anyone has read this far, you have my sympathy. I just\nwanted to spell out what is common knowledge to most here on the chance\nthat one item might ring a bell and answer a question for you. If the ISS\nor either of the PSAT digipeaters would come back online, that would make\nit a lot easier to practice with these modes. As of the date I'm typing\nthis, all we have active over my location in the U.S. are AISAT-1 (1200\nnarrow-FM) & FS-3 (9600).\n\nGood luck!\n\n-Scott, K4KDR\n\n===========================\n\nOn Sat, Sep 7, 2019 at 11:01 AM Hans BX2ABT via AMSAT-BB <[email protected]>\nwrote:\n\n> Hello all,\n>\n> Apparently my mail about BugSat-1 raised some interest into that bird's\n> digipeater. But that still leaves me with the following question (and I\n> hope I don't sound too obtuse): how do you digipeat? I've tried to\n> understand it by googling it over the past year or so, but I still don't\n> get it much. Most tutorials explain about setting it up, but with HTs. I\n> am running a home station only, with the rig connected to a PC. From\n> what I understand you need to use the program UISS then.\n>\n> I got as far as this: I installed UISS (under Wine) and got it connected\n> to Direwolf. Right now I can work the Falconsat-3 BBS using PacSat\n> Ground Station and while running that program I see the same messages\n> that Direwolf displays also appearing in UISS. So far, so good, but then\n> what? I press either F5, F6, or F7, but nothing happens. Yes, my rig\n> burps out some data for a split second, but I can't find myself back on\n> APRS.fi. So what am I doing wrong? Any parameters to adjust? Or are\n> digipeats not stored for the next iGate to put it on the internet?\n>\n> Again, I hope I don't sound too witless, but I've never really\n> understood APRS, apart from terrestrial position reporting and even that\n> was kind of hard with all the paths and whatnot. Hope you nice people on\n> this list can drop some pointers. 73 de Hans\n>\n> P.S. I've got some nasty local interference on 145.825 MHz and that\n> makes receiving the ISS and other birds almost impossible. I was lucky\n> to get two frames in from IO-86 the other day, because that was due\n> south, with the QRM coming from the north-east. Getting a signal up\n> shouldn't be much of a problem, though.\n>\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n \n", "attachments": [] }