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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XUQGLCTQRQYVGTGS5GJFOWCFMIZ5YCI4/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "XUQGLCTQRQYVGTGS5GJFOWCFMIZ5YCI4",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O4CBHCQWIXPB6I76ZE7HLBOT23BUM32U/?format=api",
    "sender": {
        "address": "rwmcgwier (a) comcast.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Robert McGwier",
    "subject": "[amsat-bb] Re: Eagle and emergency traffic (was Re:\tGalileointerference on L band)",
    "date": "2006-09-24T06:56:18Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TJQQDP5EXT4HNAQCQJTTHIX4N5ZRDR4D/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FNEH476U5TI3IHLSSCEYDSQSQBIBHHWJ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\n\n\nGeorge Henry wrote:\n> ----- Original Message ----- \n> From: \"John B. Stephensen\" <[email protected]>\n> To: \"George Henry\" <[email protected]>; \"amsat bb\" <[email protected]>\n> Sent: Saturday, September 23, 2006 5:08 PM\n> Subject: Re: [amsat-bb] Eagle and emergency traffic (was Re: \n> Galileointerference on L band)\n>\n>\n>   \n>> Why would it be available for only short periods? Eagle is a HEO.\n>>\n>> 73,\n>>\n>> John\n>> KD6OZH\n>>\n>>     \n>\n> I said RELATIVELY short periods...  what is the maximum time that the \n> proposed data transponder will be available to a given ground station, with \n> favorable squint angles, on any given orbit?  What is the TOTAL, cumulative \n> access time per day?  From the perspective of an emergency manager or \n> disaster team captain, it is certain to seem small when 24/7 service is \n> available from other sources, particularly sources that they have already \n> invested in.  And since the design team is looking into their crystal ball \n> at what the state of things will be 5 years down the road at launch, surely \n> they have seen that the entire internet access landscape is sure to have \n> undergone a sea change by then?  (Bill Gates sure seems certain of that...)\n>\n> I repeat:  if the design team has anything from the NGOs to bolster the \n> claim that they (NGOs) \"need it for emergency data communications\", then \n> let's see it.\n>\n>\n>   \n\n\nI don't believe anyone said we had a directive to provide a service.    \nHow could we have such a directive when we don't have the satellite \ndesigned yet?  What NGO or government agency do you know would empower \nus to do something or even ask based on a hope we get our facility \nlaunched in the next half decade?   I wouldn't go see them about using \nus in their planning until such time as the facility was actually \navailable.   That does not make it a sin or a fault to hope to provide \nthat facility and to think about what it would take to make it \npossible.  I certainly don't hang my head in shame because I have those \nthoughts. In fact,  I am kind of proud of us for taking it into \nconsideration.\n\nEagle is being designed to provide long term access per bird as compared \nto previous and planned P3 birds.  The advanced communications package \nis being designed around the use of phased arrays.  The phased array \ndesign is targeting 70% of the orbit to be usable per bird.  If we \nchoose to stay in a 12 hour orbit,  that is 8-ish hours per orbit.   The \nonly way this can be made to work in a usable fashion, providing voice, \nconferencing, data/file transfer is the use of digital signaling.  \nAdmittedly, no ground station will see every orbit since we are also \naiming for an equatorial orbit.   We need more than one bird. \n\n73's\nBob\nN4HY\n\n-- \nAMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,\nNJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman\n\"You see, wire telegraph is a kind of a very, very long cat.\nYou pull his tail in New York and his head is meowing in Los\nAngeles. Do you understand this? And radio operates exactly\nthe same way: you send signals here, they receive them there.\nThe only difference is that there is no cat.\" - Einstein\n\n",
    "attachments": []
}