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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HQFR2GHT67UNVHHZRTEK5P2S4DBUUJBY/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "7E8F2682A3B541ACB7B245ABA569A33E@Franke",
    "message_id_hash": "HQFR2GHT67UNVHHZRTEK5P2S4DBUUJBY",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6VZSJHFE27K3HOCYYQ3IUDYU2LUEQ6CE/?format=api",
    "sender": {
        "address": "jmfranke (a) cox.net",
        "mailman_id": "6c3cc6aaa29f4579900a911c323147b7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/6c3cc6aaa29f4579900a911c323147b7/emails/?format=api"
    },
    "sender_name": "jmfranke",
    "subject": "[amsat-bb] Re: using a microsat as a potential high altitude\tVHFreflector",
    "date": "2009-10-28T20:17:10Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6VZSJHFE27K3HOCYYQ3IUDYU2LUEQ6CE/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "One drawback of the design was the high drag from such a large structure, \ncoupled with the low mass.  The end result was a satellite with a low \nballistic coefficient and hence a short lifetime.\n\nJohn  WA4WDL\n\n--------------------------------------------------\nFrom: \"Samudra Haque\" <[email protected]>\nSent: Wednesday, October 28, 2009 3:46 PM\nTo: \"Amsat-bb\" <[email protected]>\nSubject: [amsat-bb] using a microsat as a potential high altitude \nVHFreflector\n\n> Hi all,\n>\n> I read with interest an article on the web \"ECHO - America's First\n> Communications Satellite\"  By John R. Pierce  which is available here:\n> http://www.smecc.org/john_pierce___echoredo.htm\n>\n> I know ham radio operators love using their hand helds to communicate\n> using active transponders or active repeaters in space... no issue\n> with that.\n>\n> were there any ham radio projects (either through amsat-na or abroad)\n> that implemented a passive reflector on an orbital vehicle like\n> Project Echo\n>\n> I quote from \n> http://www.satmagazine.com/cgi-bin/display_article.cgi?number=490218137\n>\n> The Echo-1 Balloon Satellite as it sits, fully inflated, at a Navy\n> hangar in Weeksville, North Carolina. The spacecraft measured 100 feet\n> across when deployed, and was nicknamed a ‘satelloon’ by those\n> involved in the project. The mylar film balloon acted as a passive\n> communications reflector for transcontinental and intercontinental\n> telephone (voice), radio and television signals. Echo 1 re-entered the\n> atmosphere May 24, 1968.\n>\n>\n> What strikes me is the implications of a large large very large\n> antenna (reflector), if only it could be reflective on one side of the\n> sphere only .... (any ideas?)\n>\n> The Echo 2 was a 135-foot rigidized inflatable balloon satellite. The\n> satellite is shown undergoing tensile stress test in a dirigible\n> hanger at Weekesville. The satellite, 50 times more rigidized than\n> Echo I. When folded, the satellite is packed into the 41-inch diameter\n> canister shown in the foreground.\n>\n> Did early amsat folks consider duplicating / adding to any of these\n> projects or launch their own 'satelloon' that did not carry an active\n> RF payload ? Could we outfit one of our future microsats to provide a\n> reflector to aid in Earth-LEO DXing like meteor-scatter ?\n>\n>\n>\n> 73 de Samudra, N3RDX\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": []
}