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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FVDEVQJQB3UBVZLNWLYO3WQWTWA56AH7/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "FVDEVQJQB3UBVZLNWLYO3WQWTWA56AH7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7OAIDHSDRJQUKZLJ23BIS6EPXIS6TY2D/",
    "sender": {
        "address": "wjubbels (a) gmail.com",
        "mailman_id": "3d3f4b2ab73749eea150ce913c522e3d",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/3d3f4b2ab73749eea150ce913c522e3d/emails/"
    },
    "sender_name": "Wouter Jan Ubbels",
    "subject": "[amsat-bb] Re: DO-64",
    "date": "2008-09-16T09:18:11Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OWATTJJ4YLABVCYOIWNCGPFDGV27ICQ3/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Sebastian,\n\nbesides the fact that polarization of your uplink signal may make a\nhuge difference since the satellite is slowly tumbling, the\ntransponder has a frequency offset. 435.556MHz actually corresponds to\n145.900MHz on the downlink (instead of 435.550). Some people have\nreported even higher offsets which are likely to be caused by\ntemperature dependency of the local oscillators on board the\nsatellite, so it may help to tune around a bit in order to find your\nown downlink, which makes operating the transponder a challenge hi:).\nGood luck working DO-64!\n\n73 on behalf of the DO-64 / Delfi-C3 team,\n\nWouter Jan Ubbels PE4WJ\n\n\n\n> I listened to a pass earlier this morning ago over Miami Florida.\n> Good strong CW beacon heard throughout the entire pass, down until\n> about 1 degree, but still nothing heard on my uplink.\n>\n> 73 de W4AS\n> Sebastian\n>\n> On Sep 13, 2008, at 12:03 PM, Luc Leblanc wrote:\n>\n>> On 13 Sep 2008 at 8:15, WILLIAMS MICHAEL wrote:\n>>\n>>\n>>> As usual, the downlink signal gets weak on the second half of the\n>>> pass.\n>>>\n>>> Mike Williams K9QHO\n>>\n>> Got the same results here i got explanations regarding this signal\n>> drop for polarisation change but as the satellite attitude is\n>> uncontrolled i tend to believe it's more an effect of the antennas\n>> pointing towards the earth station and pointing away than a\n>> polarisation\n>> issue. This change in the signal level start exactly pass the TCA\n>> point and signal degrade up to a point he's drop below the noise?\n>>\n>> I try to figure out the satellite shape spinning and thumbing in\n>> space in regard of the polarisation and it will be very odd that the\n>> polarisation change happen just at TCA?\n>>\n>> Any ideas here?\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",
    "attachments": []
}