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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QOS3PQCQ42Y6XLJOCGCMRT325NI3Q3A3/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "QOS3PQCQ42Y6XLJOCGCMRT325NI3Q3A3",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IP6LTNRQHYFPUQ2FYFDOPYZRQ3ZUAWLQ/",
    "sender": {
        "address": "ko6th_greg (a) hotmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Greg D.",
    "subject": "[amsat-bb] Re: Less than lightening Results",
    "date": "2009-04-11T03:19:23Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IZHEVWJZIKSYSUMEYK4WTZSZZ2ZMEJHY/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nHi Sebastian,\n\nFilling in the details from others...\n\nAO-10 is still in orbit, but the electronics appear to be mostly toast.  The control computer was fried by radiation years ago, due to it being in an odd orbit because of a partial booster failure.  The radios still worked for a while, but it was became erratic with good days and bad, more bad than good.  Last time it was heard was a number of years ago, but there's still a chance it will be heard from time to time.\n\nAO-13 is no longer in orbit.  Both AMSAT and NASA learned that there are some orbits that don't last long, because of a \"resonance\" in the timing of their orbit compared to the orbits of the Moon and the Earth going around the Sun.  The result was that the satellite got a little \"cosmic tug\" in its orbit, slowly pushing it into the planet below.  Not good.\n\nMany others have been lost due to battery or electronic failures, including for a while, AO-07.  But after 21 years on the \"dead\" list, AO-07's batteries opened up and the electronics (which somehow survived all those years) woke back up on solar power alone.  \n\nGreg  KO6TH\n\n\n> From: [email protected]\n> To: [email protected]\n> Date: Fri, 10 Apr 2009 14:00:19 -0400\n> Subject: [amsat-bb] Re: Less than lightening Results\n> \n> They say that no question is a dumb question, so here goes - since I  \n> haven't seen this discussed before, but maybe I missed it.\n> \n> What makes AO-7 so special?  Why is it that we lost AO-10, AO-13 and  \n> all the others in the past several years, yet this one is still  \n> working?  I know the batteries are dead, but I'm primarily interested  \n> in how this bird is able to stay in it's orbit for over 30 years?  And  \n> if it's orbit is decaying, how is it that it has apparently decayed so  \n> slowly?\n> \n> I was under the impression that unless a satellite is occasionally  \n> 'boosted', it will eventually re-enter?  I somehow doubt AO-7 has any  \n> fuel left in it's boosters; if it had any.\n> \n> 73 de W4AS\n> Sebastian\n> \n> On Apr 9, 2009, at 11:01 PM, Greg D. wrote:\n> \n> >\n> > Yeah, this is one grand old bird (the satellite, I mean).  If you  \n> > look at the planetary statistics, the median age of the human  \n> > population is about 26.8 as of 2000, and growing slowly.  That makes  \n> > AO-07, at age 35, significantly older than more than half of the  \n> > people on Earth.\n> >\n> > Greg  KO6TH  (one of the few older than AO-07...)\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_________________________________________________________________\nRediscover Hotmail®: Get quick friend updates right in your inbox. \nhttp://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Updates1_042009",
    "attachments": []
}