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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VG23WW5P7X3G4I5EAFZCPOIKKD7RPGZA/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "VG23WW5P7X3G4I5EAFZCPOIKKD7RPGZA",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/CYFESNEC5NQENHUGBE7EQRSDXEAZBJHF/?format=api",
    "sender": {
        "address": "oz1my (a) privat.dk",
        "mailman_id": "b2f56900318d4d1193159750f39aa3fe",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/b2f56900318d4d1193159750f39aa3fe/emails/?format=api"
    },
    "sender_name": "Ib Christoffersen",
    "subject": "[amsat-bb] Re: STRaND1 polarity shift observation",
    "date": "2013-03-04T16:51:23Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/22C2Z4BEF3C7DRKR7LHIR63TNFY56IZZ/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EQVFLOXZLTFNK2O7PVDRMXJDGUKGLDKI/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Ken,\nYou can experience the same effect from SO-50 when using circularly\npolarized antennas on ground.\nSO-50 also have linear antennas for the FM repeater.\nI must change between RHCP and LHCP to get maximum signal during a pass.\nSometimes the difference is from zero to a very good signal.\n\nI think it is interaction between the antennas and the rest of the structure\nof the satellite combined with the passive attitude control and the angle\nyou see the satellite in.\n\n73 OZ1MY/Ib\n\n-----Oprindelig meddelelse-----\nFra: [email protected] [mailto:[email protected]] På vegne\naf Ken Swaggart\nSendt: 04 March 2013 17:03\nTil: i8cvs; Amsat - BBs\nEmne: [amsat-bb] Re: STRaND1 polarity shift observation\n\nDomenico,\n\nThanks for sending the K4KJ article.\n\nHowever my question was why does STRaND1, which only has a whip antenna, \nsometimes appear to exhibit circular polarity characteristics?  I would \nexpect a whip antenna transmitting from space to have the same signal \nstrength on the ground using either RH or LH polarity on my receiving \nantenna.\n\n73,\nKen, W7KKE\n\n-----Original Message----- \nFrom: i8cvs\nSent: Monday, March 04, 2013 00:42\nTo: Ken Swaggart ; Amsat - BBs\nSubject: Re: [amsat-bb] STRaND1 polarity shift observation\n\nHi Ken, W7KKE\n\nThe answere to your question is clearly described into the zipped article\n\"Circular Polarization\" by K4KJ, 5 MB long that I have sent to you in\na separate email.\n\n73\" de\n\ni8CVS Domenico\n\n----- Original Message -----\nFrom: \"Ken Swaggart\" <[email protected]>\nTo: <[email protected]>\nSent: Monday, March 04, 2013 5:10 AM\nSubject: [amsat-bb] STRaND1 polarity shift observation\n\n\n> During my last pass at 0332Z, max elevation 45 degrees out over the\nPacific,\n> I noticed that STRaND1 was stronger when I selected LHCP while approaching\n> TCA.  After TCA, RHCP was stronger while it was receding.  I believe this\n> cubesat uses a whip, so not sure what is causing this.\n>\n> Anyone have an idea why?\n>\n> Tnx,\n> Ken, W7KKE\n> CN75xa\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 program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\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\n",
    "attachments": []
}