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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AS7YSZ2ZYX5FC7JWLU4PV4JDOMWRO5ZK/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "196ED22F6D9544DCBAE390035AD6F503@KC6UQH",
    "message_id_hash": "AS7YSZ2ZYX5FC7JWLU4PV4JDOMWRO5ZK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6WKYVCFHWKTMVFBPJJFIT7MBE4TW3FT2/?format=api",
    "sender": {
        "address": "kc6uqh (a) cox.net",
        "mailman_id": "d9201820d18047e4a2772c86bda5e111",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d9201820d18047e4a2772c86bda5e111/emails/?format=api"
    },
    "sender_name": "Art McBride",
    "subject": "[amsat-bb] Re: BeeSat at 4800 GMSK",
    "date": "2010-04-11T06:24:40Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TCJLTHTDOSMI7LURHHDERGOOL6UBKK77/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2L7GDSDW6GCI7FKLNWUQKXNZT23XCW4N/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "D-Star protocol is 4.8kb/sec for voice 1.2 kb for FEC and 1.2kb for data. It\nis GMSK data, transmit rate is 3.6KHz max transmission rate, (7.2kb NRZ),\ndeviation is 1.8 KHz for a modulation index of 0.5.  BW per Carlson's rule\nis 7.2 KHz \nA vocoder module provides for the voice compression. The Data side is used\nfor Call Sign, Name, City/ State, Brag Tape, GPS position, and Texting all\ndone with voice simultaneously. D-Star is not very successful in mobile\noperation. I have had lots of conversations go R2D2 from a truck or car\npassing me. From a fixed position range is surprisingly good. When used on a\nSatellite this narrow mode I suspect is very sensitive to Doppler as well as\nmultipath. Circular antennas on both ends will solve multipath, but Doppler\nshift must be dealt with.  \nArt,\nKC6UQH \n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Nathaniel S. Parsons\nSent: Saturday, April 10, 2010 10:02 PM\nTo: Tom Azlin N4ZPT\nCc: AMSAT-BB\nSubject: [amsat-bb] Re: BeeSat at 4800 GMSK\n\nAh, thanks for clarifying. Unfortunately, if I understand you correctly, we\nwould have to talk to our satellite via digital voice, or at 128kbps, which\nwould be great if we could!\n\n-Nate\n\nOn Sat, Apr 10, 2010 at 10:15 PM, Tom Azlin N4ZPT <[email protected]> wrote:\n\n> Well, make that the digital voice part of the protocol. The high speed\n> digital data part is up to 128kbps which was not what I was thinking of.\n>\n> 73, tom n4zpt\n>\n> Tom Azlin N4ZPT wrote:\n>\n>> Hi Nate,\n>>\n>> the D-STAR protocol is only GMSK at 4800 bps and they selected a\n>> time-bandwidth product of 0.5. 4,800 bps or 4k8 is perhaps not talked\nabout\n>> as that IS the standard for D-STAR. So the software there might be\n>> adaptable.  that is the reason I thought to suggest it.\n>>\n>> Good luck and 73, Tom n4zpt\n>>\n>>\n>>\n>> Nathaniel S. Parsons wrote:\n>>\n>>> Hi Tom,\n>>>\n>>> My mind had indeed played a trick on me, and I remembered MFSK as MSK.\n>>>\n>>> As far as the DStar group goes, I don't see any mention of 4800 bps or\n>>> 4k8\n>>> kbps on the public page, so if it's not the group's focus, I don't want\n>>> to\n>>> have to rely on that solution.\n>>>\n>>> Thanks,\n>>> -Nate KC2SVI\n>>>\n>> _______________________________________________\n>>\n>> Sent via [email protected]. Opinions expressed are those of the author.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>\n>>\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n__________ Information from ESET NOD32 Antivirus, version of virus signature\ndatabase 5016 (20100410) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n\n\n \n\n__________ Information from ESET NOD32 Antivirus, version of virus signature\ndatabase 5016 (20100410) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n \n \n\n__________ Information from ESET NOD32 Antivirus, version of virus signature\ndatabase 5016 (20100410) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n \n\n",
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}