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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NX5LJQYCN7ZYWH5V636F367VMR3UWAJE/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "NX5LJQYCN7ZYWH5V636F367VMR3UWAJE",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/WFFMG5GMDUA7UCCMFYMVS46EAF2RNRJZ/",
    "sender": {
        "address": "co7wt (a) frcuba.co.cu",
        "mailman_id": "e0c3935155ca4fb78cafec35cf64d7f2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e0c3935155ca4fb78cafec35cf64d7f2/emails/"
    },
    "sender_name": "M.Sc. Pavel Milanes Costa",
    "subject": "Re: [amsat-bb] A tip for Gqrx users and report of the copy of FIREBIRD-II FU3/4 19k2 FSK.",
    "date": "2015-10-15T22:02:38Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WFFMG5GMDUA7UCCMFYMVS46EAF2RNRJZ/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi, some users have asked for pictures of this... so I share this on the BB\n\nThanks to Scott (K4KDR) that put them on-line for me (I have internet \nproblems here at the moment)\n\n=========\n\nPartial satellite sub-band in view, it's bigger than the BW of the RTL-SDR\nhttps://www.dropbox.com/s/f0dsrdfspz4dhw6/Full%20satellite%20sub-band%20in%20view%2C%20bigger%20than%20the%203.2Mhz%20RTL-SDR.png?dl=0\n=========\nTracking Cute 1.7 (sat not in range) + Gpredict control\nhttps://www.dropbox.com/s/argg4va9xudjo47/Tracking%20Cute%201.7.png?dl=0\n========\n\nTracking phonesat 2.4 (no signal, end of the pass)\nhttps://www.dropbox.com/s/kewdqkyga1x3xl2/Tracking%20phonesat%202.4.png?dl=0\n\n\n========\nTracking phonesat 2.4 wide\nhttps://www.dropbox.com/s/smoabjs9nuq3xhz/Tracking%20phonesat%202.4%20wide.png?dl=0\n\n=========\nTracking phonesat 2.4 wider...\nhttps://www.dropbox.com/s/vx8frrzx8uiicoo/Tracking%20phonesat%202.4%20wider.png?dl=0\n\n========\n\nDetail of two signals in the spectrum; the left is a terrestrial signal \n(commercial?: more than one TX site/signal level, always there, no \ndoppler) and right is unknown...\n\nhttps://www.dropbox.com/s/f8eleb1qobzr6dw/Two%20not-noise%20signals.png?dl=0\n\n========\n\nWith this I see that there are some withe spaces on the sub-band, I have \nto check the band plan of the IARU...\n\nEnjoy, 73.\n\nPS: antenna is a homebrew RHCP QH and homebrew preamplifier (not worth \nto name it as \"LNA\", it's quite noisy but do the job....)\n\n\nEl 14/10/15 a las 23:24, M.Sc. Pavel Milanes Costa escribió:\n> I'm playing this night with my linux box and rtl-dsr + Gqrx + Gpredict \n> to see the 70cm satellite sub-band...\n>\n> And found a way to identify the sat from the spectrum at a glance in \n> 70cm using the bookmarks of gqrx... very handy feature of this \n> software... just linux here, not know if windows sdr soft has this \n> feature...\n>\n> After playing with satlist.csv (from \n> http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm) and parsing it to \n> make it work with gqrx... I fire the Gqrx software, put up the antenna \n> and watch for any suspicious signal... and the bookmarks on top of the \n> signals are there, nice....\n>\n> ... (a few minutes after) ...  haja !!!!\n>\n> A packet like signal around 437.4 Mhz, zoom it.... wow, to wide for \n> normal packet... let's widen the filter to fit... ~25 Khz is enough, \n> hum... it's bigger than 9600 bauds... lets see what the bookmarks on \n> the screenm says... FIREBIRD-II FU4 19k2 FSK within the +/- 10khz of \n> doppler... bingo !!!\n>\n> Let's run Gpredict to check.... right on the spot... and also \n> FIREBIRD-II FU3 incoming on range... let's check... right...\n>\n> So if you use linux and some SDR hardware with Gqrx, you can use the \n> bookmark function to this purpose, you can actually click & zoom and \n> then read of the screen to approximate which is the satellite who tx \n> that signal... all at a glance...\n>\n> If any of you want to play with this I can send you my bookmark file \n> of the entire 70cm satellite sub-band, updated with the last info \n> from  http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm just email \n> me a private msg.\n>\n> I was not trying to decode, just to prove the usefulness of this \n> feature, I use the latest gqrx & gpredict from ubuntu PPA.\n>\n> BTW, none of the FIREBIRD satellites are in the \n> http://www.amsat.org/status/ page, so I can't update it's state.\n>\n> 73 from Cuba, CO7WT\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 \n> of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite \n> program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n\n",
    "attachments": []
}