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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UT3OBZSK5HF6XEL2GUP3WT26CSY4SDL4/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "6B12ADFDD4C14F20A29D68D76E9DC197@WA4SCA",
    "message_id_hash": "UT3OBZSK5HF6XEL2GUP3WT26CSY4SDL4",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5MA2QBSRXAIAMOROK2TGCQFNHQOH2DII/?format=api",
    "sender": {
        "address": "APBIDDLE (a) UNITED.NET",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Alan P. Biddle",
    "subject": "[amsat-bb] Re: AO-51 SIGNAL?",
    "date": "2008-10-13T15:04:16Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5MA2QBSRXAIAMOROK2TGCQFNHQOH2DII/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Doug,\n\nSpeaking generally, satellites are not symmetric, often but not always\nlocked to the Earth's magnetic field lines, and everything from the gain to\nthe circularity depends on \"how you look at it.\"  The antenna may be\npartially blocked, and far off axis a circularly polarized system becomes\nelliptical, and may even reverse direction.  \n\nI have enough RX gain that it is never a problem hearing AO-51, but I do\nnotice there is some variation, particularly WRT polarization.  Likewise, I\ncan always uplink on Mode-L, but there is a distinct difference in the power\nrequired depending on the direction of the pass.\n\nYou mentioned both a beam and a vertical.  More details would help to\ndetermine whether you are \"doing anything wrong,\" but it sounds as if your\ngain is low enough that you are hearing the difference a few db makes.  The\nusual questions would be length and quality of coax, pointing accuracy for\nthe beams, use of a low noise preamp, etc.\n\nAlan\nWA4SCA\n\n\n\n",
    "attachments": []
}