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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5JAOOMK5YHLKED33CRV2KXO65IMZYUXZ/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "5JAOOMK5YHLKED33CRV2KXO65IMZYUXZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ABM4LAMZ3D6GN4O4IS4BLBR7RGGTGY6H/",
    "sender": {
        "address": "grant (a) ghengineering.co.uk",
        "mailman_id": "74a4d29508634e669020884f51007f55",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/74a4d29508634e669020884f51007f55/emails/"
    },
    "sender_name": "Grant Hodgson",
    "subject": "[eagle] Re: S1 downlink coordination and interference mitigation",
    "date": "2006-10-17T10:39:22Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ABM4LAMZ3D6GN4O4IS4BLBR7RGGTGY6H/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/G7DFBJO3WP336FYBVY3BA4NKHRIWC5G3/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Howard et al\n\nThe linear transponder on ESEO will also be 'as close to 2400 as \npossible'.  Given that the orbits of ESEO and Eagle are planned to be \nfairly similar (low inclination GTOs AFAIK) I would assume that the \ndownlinks won't overlap, as there will be times when both satellites \nwill cover the same footprint?\n\nregards\n\nGrant\n\n\nHoward Long wrote:\n> Folks,\n> \n> Coincidentally at the Symposium, Graham Shirville spent some time\n> coordinating proposed frequencies to some satellites, including Eagle, and\n> after a suggestion I had from from Drew KO4MA, I reiterated to Graham that\n> it may be advantageous to propose S1 frequencies right down at the bottom\n> 1MHz of the 2.4GHz satellite allocation.\n> \n> 802.11 specifies a 1MHz guard band at 2400 to 2401MHz for regulatory OOB\n> emission reasons. Signals +/-11MHz from the centre must be at least 30dB\n> down from the carrier. Channel 1 is at 2412MHz.\n> \n> Taking into account Doppler, the recommended S1 coordinated frequencies will\n> be at the bootom end of 2400MHz without the possibility of OOB emissions on\n> Earth due to Doppler.\n> \n> 73, Howard G6LVB\n> \n> _______________________________________________\n> Via the Eagle mailing list courtesy of AMSAT-NA\n> [email protected]\n> http://amsat.org/mailman/listinfo/eagle\n> \n> \n\n",
    "attachments": []
}