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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZD4YBPVBQVZ7IA5IUFCZ4BTEMQCAQXZV/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "ZD4YBPVBQVZ7IA5IUFCZ4BTEMQCAQXZV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6BIYZYLXMF45EQ6KPHOVD5LPGSMJONLN/?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] PSAT2 downlink for DTMF grids and messages",
    "date": "2019-08-14T12:59:57Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WWSR3SE776EZCLAD3JFJ5HM37EZPRUEZ/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "That is so cool! I am beginning to TX with DTMF; I hope to get it working soon from my Yeasu FT2DR without doppler shifting.\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 Tuesday, August 13, 2019, 10:29:59 PM PDT, Scott via AMSAT-BB <[email protected]> wrote:  \n \n Well, more great news on the PSAT-2 DTMF front.\n\nIn my previous post I had mentioned that the satellite accepted a \"QSL\"\nfrom me against KC9ELU's CQ message.  Here's the downlink from that:\n\n--------------------------------------------\n}K4KDR >APS,TT,PS2*::ALL      : Q S L, your number 45, My number is 53.\n--------------------------------------------\n\nWell, on tonight's 0445 UTC pass, even though PSAT-2 was well past me and\nlosing elevation, KC9ELU got through to it with a QSL of my #53!\n\nThe downlink audio was something like \"KC9ELU QSL your CQ #53 - Thanks for\nthe Contact\".  I can only paraphrase because like a total idiot with the\nsatellite so far past me, I had stopped recording.  Yes... I should know\nbetter and am usually more careful.\n\nAnyway, great fun to see the full contact sequence completed, even if it\ntook multiple passes on different days.\n\n***UPDATE:  Just got an email from KC9ELU - he didn't have audio but did\ndecode the downlink packet!  Makes me feel better to actually see it:\n\n---------------------------------------------\n}KC9ELU>APS,TT,PS2*::ALL      : Q S L, your C Q number 53 and thanks for\nthe contact.\n---------------------------------------------\n\nEarlier in the pass I was able to get another QSL accepted against PY5LF's\nCQ #59, too:\n\n--------------------------------------------\nPSAT2-1>APOFF,ARISS:}K4KDR >APS,TT,PS2*::ALL      : Q S L, your number\n59,  My number is 62.\n--------------------------------------------\n\n... but Direwolf decoded that downlink packet with a bit error, so it was\nnot iGated onto the greater APRS network.  But that's going to happen\nsometimes, especially with a sat at low elevation.  At least I got to hear\nand see the feedback that I was heard by the DTMF engine.  Here is the\ndownlink audio from that one:\n\nhttps://www.qsl.net/k/k4kdr//files/2019-08-14--0445--psat2.mp3\n\nSo Luciano, if you'd like to QSL my #62, the satellite should respond with\nthat \"Thanks for the Contact\" message to complete that full exchange.\n\n-Scott,  K4KDR\n\n=================================\n\n\nOn the 0448 UTC pass tonight, even though the satellite was well past me\n\nOn Tue, Aug 13, 2019 at 3:38 AM Scott <[email protected]> wrote:\n\n> Well, at the last minute before tonight's PSAT-2 passes, I finally figured\n> out the correct format for the DTMF QSL messages & answered my own question.\n>\n> Here's a tweet w/ screen shots & audio URLs from tonight's successful DTMF\n> connections:\n>\n> https://twitter.com/scott23192/status/1161174309328621573\n>\n> I found the following page particularly helpful:\n>\n> http://aprs.org/QIKcom/Q2-DTMF-messages.txt\n>\n> ... in particular, the instruction:\n>\n> ---------------------------------------------\n>\n> DTMF messages are sent in a 16 key string starting with the \"C\", ending in #\n>\n>  //\n>\n>    CMMxxCCCCCCkkkk#  Where CCCCCCkkkk are your callsign keys and key code\n>                      and MM is the message number below\n>\n> ---------------------------------------------\n>\n> .. so, here is how it breaks down if anyone else could use the extra help that I did.\n>\n> Get your call/grid DTMF from http://aprs.org/PSAT2Translator.html\n>\n> (important note:  if your callsign is less than 6 characters, put a space or 2 at the end to bring your character count to -6- before clicking \"Translate\")\n>\n> ... so for a CQ, I use that string exactly:\n>\n> *18175453702201#\n>\n> However, if I want to QSL someone else's CQ, I only use the call sign portion of that DTMF string.  The string that gave me the QSL success was:\n>\n> C40455453702201#\n>\n> ... let's break that in its parts:\n>\n> >C :  message follows\n> >40 :  message #40 is a QSL\n> >45 :  I am QSL-ing CQ #45  (from KC9ELU as seen on http://www.aprsat.com/dtmf ) [... or heard directly over-the-air!! ]\n> >545370 :  the call sign portion of my original DTMF translation\n> >2201 : also from the original DTMF translation - simply put, a converted 'key code' that goes with the previous numbers representing my call sign\n> ># :  END of message\n>\n> I won't go into the creation of the DTMF audio file here (I use Audacity); please feel free to contact me if you need help on that.  I used audio files transmitted via Signalink at my location, but of course if you have a radio with DTMF memory capability, that's an option, too.\n>\n> Hope that is helpful to someone else since I was so slow on the pick-up on how to format the QSL type of message.\n>\n> -Scott,  K4KDR\n>\n> ======================\n>\n>\n> On Mon, Aug 12, 2019 at 11:46 PM Scott <[email protected]> wrote:\n>\n>> Many thanks to Robert for the time he's put into creating these very\n>> informative web pages!\n>>\n>> Bob, I have read and re-read the DTMF instructions but even though it\n>> reflects poorly on me, I'm not sure what exact string to transmit to QSL\n>> someone's previous CQ.\n>>\n>> So here is my best guess - please correct as required.\n>>\n>> My callsign/grid DTMF (that has worked once) is:  *18175453702201#\n>>\n>> For me to QSL CQ #45 from KC9ELU, do I transmit the following?:\n>>\n>> C4045*18175453702201#\n>>\n>>\n>> Thanks in advance!\n>>\n>> -Scott,  K4KDR\n>>\n>> ==========================\n>>\n>> On Mon, Aug 12, 2019 at 9:55 PM Robert Bruninga via AMSAT-BB <\n>> [email protected]> wrote:\n>>\n>>> Thanks to Robert, KE6BLR, we can now capture the DTMF Grids and Messages\n>>> data coming down from PSAT2.  I have added the DTMF page to the list of\n>>> links for PSAT2:\n>>>\n>>> http://aprs.org/sats.html\n>>>\n>>> Summary:  You encode your Grid and callsign into a 16 digit DTMF memory\n>>> on\n>>> your radio.  Using narrow band FM, send it on 145.98 withi doppler\n>>> compensation or at the middle of a pass.\n>>>\n>>> PSAT2 assigns a CQ number and acknowledges it by voice and then sends an\n>>> APRS packet that contains the grid.  Robert's web page will capture that\n>>> packet.\n>>>\n>>> A second station can send their DTMF grid and get the same process but\n>>> with\n>>> a new CQ number.\n>>>\n>>> Now, either station can send a DTMF QSL Message for the other guy's CQ\n>>> number which will also be spoken and recorded on the APRS downlink.\n>>>\n>>> Details on the psat2 page on the above web page.\n>>> PSAT2 is entering a phase of Apogee in the northern hemisphere for a week\n>>> or so and so is more workable in the USA and southern Europe.\n>>>\n>>> Bob, WB4APR\n>>>\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",
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