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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HMVBMDO24CYAR33CUBH4FBK4TA4WVIZK/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "HMVBMDO24CYAR33CUBH4FBK4TA4WVIZK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/X5S363MF6TGCVSG6XYK2FZQXUB6XFTXC/?format=api",
    "sender": {
        "address": "g7iii (a) g7iii.net",
        "mailman_id": "0f637f75ff6f40f5888fc0c2c82dc515",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/0f637f75ff6f40f5888fc0c2c82dc515/emails/?format=api"
    },
    "sender_name": "Iain Young, G7III",
    "subject": "Re: [amsat-bb] NOAA Weather Satellite receiver",
    "date": "2014-12-05T23:07:30Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YW7HCOS5VMGUESIYDI4IHU27Q2T762EO/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi,\n\nI used a Funcube Dongle and gnuradio. You do need the 40 (34)kHz bw.\nGoogle for OZ9AEC, Gnuradio, NOAA.\n\nAlex has done it in gnuradio. I have also done it in gnuradio [to be\nhonest most of it was \"borrowed\" from Alex]\n\nSee http://hal.g7iii.net/POES/FlowGraphs/POES_Live_Decode_Annotated.png\n\nIf you patch in a resampler (to 11.025kHz) between the FM Demod and\nAudio sink blocks, you can send that to an ALSA loopback sound device,\nand connect wxtoimg to the other end.\n\nSee (unannotated, and with extra debug, dual output so I could compare,\nand other features):\n\nhttp://hal.g7iii.net/POES/FlowGraphs/POES_Live_WXtoIMG.grc.png\n\nPlenty of received pictures at http://hal.g7iii.net/POES/\n\n\nIain\n\nOn 05/12/14 22:29, jkelly wrote:\n> I believe the bandwidth is less - but due to doppler they spec a 40khz\n> bandpass so\n> the 34khz signal can slide within the 40khz receiver.\n>\n> This link might be helpful:\n>\n> http://en.wikipedia.org/wiki/Automatic_Picture_Transmission\n>\n> Jeff\n> K2SDR\n>\n> http://wx.k2sdr.com\n>\n>\n>\n> On 12/5/2014 4:34, Rupesh Lad wrote:\n>> Hello all;\n>>\n>> I am an undergraduate Engineering student and a SWL. I have tracked many\n>> Amateur satellites from COEP Ground station, VU2COE.\n>>\n>> I want to Home brew a NOAA satellite image receiver as my academic\n>> project.\n>> I will be using WXtoImg to decode the image transmitted by NOAA satellite\n>> on APT frequency. So the task for me is to get the audio frequency\n>> output.\n>>\n>> Literature says that NOAA satellites transmit a signal of 40 kHz\n>> bandwidth.\n>> I have also observed the spectrum on Spectrum analyzer using my antenna.\n>> Want to know whether this is only RF bandwidth? and if it is so, then\n>> what\n>> is IF bandwidth of such signals?\n>>\n>> Can anyone help us in designing the receiver?\n>>\n>>\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://amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}