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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MEIXBXP5IA2EPMQQCXPM3E3GNUNXMXJD/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "002b01c8489c$ef46ed00$0500a8c0@parents",
    "message_id_hash": "MEIXBXP5IA2EPMQQCXPM3E3GNUNXMXJD",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VRAZHFDIIVIFCNUWFWMWTVNCYB2X73VE/?format=api",
    "sender": {
        "address": "ka3hsw (a) earthlink.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "George Henry",
    "subject": "[amsat-bb] Re: How to calibrate the azimuth angle?",
    "date": "2007-12-27T15:27:03Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/C42EVT4UV6WNOVCJPD3OS43Q23UBPPFQ/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\n----- Original Message ----- \nFrom: \"Tony Langdon\" <[email protected]>\nTo: \"Chiu-Teng Tsai\" <[email protected]>; <[email protected]>\nSent: Thursday, December 27, 2007 3:30 AM\nSubject: [amsat-bb] Re: How to calibrate the azimuth angle?\n\n\n> At 04:08 PM 12/27/2007, Chiu-Teng Tsai wrote:\n>>Dear all,\n>>\n>>     I am Chiu-Teng Tsai (BM6ERA) from Taiwan. Now we are building a\n>> mobile ground station. One of our problem is how to calibrate the\n>> azimuth angle. Use compass only, or any better solution? Thanks for your \n>> help!\n>\n> Azimuth is given in degrees from true North.  A compass is fine, if\n> you know the magnetic declination (i.e. the difference between true\n> North and magnetic North) for your location.  That information should\n> be readily available on the Internet.\n>\n> 73 de VK3JED\n> http://vkradio.com\n>\n\n\nIf the declination is less than half of your antenna's 3 dB beamwidth, you \ncan probably ignore it and just point to magnetic north.  With a dish, it \nbecomes significant, however.\n\nAnother tried and true method is to track the sun, and adjust your antenna \nmounts and rotor mount to cast the smallest shadow (\"X\") of your antennas on \nthe ground, or sight thru the antenna boom (\"boresight\") while tracking the \nmoon (DON'T look at the sun!).\n\nGeorge, KA3HSW\n\n",
    "attachments": []
}