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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NRN6TIP4DI2NO4OA7LIO6POQDBKNQCWH/?format=api",
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    "message_id": "5C7B0384F6074FF5943E58136B182E73@KC6UQH",
    "message_id_hash": "NRN6TIP4DI2NO4OA7LIO6POQDBKNQCWH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZQ267DRRUPKMGLQST654EMCD6J2S2YDJ/?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: ISS HamTV Frequencies",
    "date": "2013-05-13T04:43:36Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HPBPPSQGJZCRKLBZMRRN5EB7AF3Q6JVP/?format=api",
    "children": [],
    "votes": {
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        "status": "neutral"
    },
    "content": "Roger,\nA SWAG, (Wild Guess) 1 degree per second at a Zenith of 90 degrees. Anything\nless than 90 degrees will be slower with several minutes spent near the\nhorizon. You can use an orbital program to get exact numbers. With a wide\nbeam width antenna, the lag overhead may never require the antenna to move\nwith the object, as there will be time for the antenna system to catch up\nafter passing overhead. \nArt,\nKC6UQH \n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Roger\nSent: Sunday, May 12, 2013 2:34 PM\nTo: [email protected]\nSubject: [amsat-bb] Re: ISS HamTV Frequencies\n\nAnybody off the top of their heads know how many degrees a second swing \nare (is?) required for direct aim at the ISS?  I know there are beam \nwidth tolerances, altitude variations and degree above horizon \nvariations but I'm looking at Bob B's fixed antenna aiming of 15-20 \ndegrees above horizon to evaluate swinging a dish without torque eating \nup the drive train...\n\nRoger\nWA1KAT\nOn 5/12/2013 5:01 PM, M5AKA wrote:\n> The AMSAT-UK page at http://amsat-uk.org/2013/05/12/hamtv-from-the-iss/\nprovides the links, they are:\n>\n> Facebook https://www.facebook.com/Hamtvproject\n>\n> More information at http://www.amsat.it/Amsat-Italia_HamTV_brochure.pdf\n> and http://www.amsat.it/Amsat-Italia_HamTV.pdf\n>\n> The HamTV.pdf gives the link budget, looks like there's 7dB of\ncoax/connector losses to overcome between the ISS transmitter and the\nantenna. That document indicates a 90cm dish should be sufficient.\n>\n> I believe that it's going up on ATV 4 which is currently slated for June\n5.\n>\n> 73 Trevor M5AKA\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",
    "attachments": []
}