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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/W7KIB75MXFWA2YA7XI7ZKQCGJSIWZJLH/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "5EA5BE08620A4D7C8F672539E63E1042@KC6UQH",
    "message_id_hash": "W7KIB75MXFWA2YA7XI7ZKQCGJSIWZJLH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/MWB7WNWLTTN7YPBF4IUX5YEQVHME2GZS/?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: AO-51 S-Band antenna polarization",
    "date": "2010-12-24T21:08:59Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2FTTQHR2RJHYF5GGOEI44LCNINEZ3DKQ/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "John,\n>From the information of the time I researched it soon after AO-51 was\nlaunched, I recall it was linear but polarity was pointing angle dependent.\nI used a patch LH rotation feed on a 20\" MDS dish with great results using a\nKG5NA down converter. Being circular there was one less variable to contend\nwith during the short duration passes of AO-51. The gain of the dish with\nthe low noise figure of the down converter more than made up for the 3 dB\nloss from linear to circular. \n\nArt,\n KC6UQH\n\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of jmfranke\nSent: Tuesday, December 21, 2010 11:57 AM\nTo: [email protected]\nSubject: [amsat-bb] AO-51 S-Band antenna polarization\n\nDoes anyone know the polarization of the 2.4 GHz transmissions from AO-51. \nAre they circular?  If so which polarity, RHCP or LHCP?  Are they linear? \nIf so is there a preferred receiving polarization?  I have examined the \nAMSAT web site and many references on the Internet, but cannot seem to find \nthe answer.\n\nThanks,\n\nJohn  WA4WDL  AMSAT member 10211 \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 5719 (20101220) __________\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 5730 (20101224) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n \n\n",
    "attachments": []
}