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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VIPQ2M3PWIRMZV7EIHVXPXKUAG6SRH5W/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "VIPQ2M3PWIRMZV7EIHVXPXKUAG6SRH5W",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6AILL7KYE47IONEV57PJ3J2PTLPOYPD5/?format=api",
    "sender": {
        "address": "kq6ea (a) verizon.net",
        "mailman_id": "d2ef86d749ee450c8ad9ffc9f2e15cad",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d2ef86d749ee450c8ad9ffc9f2e15cad/emails/?format=api"
    },
    "sender_name": "Jim Jerzycke",
    "subject": "[amsat-bb] Re: ARISSat-1 Battery",
    "date": "2011-08-14T23:04:55Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6AILL7KYE47IONEV57PJ3J2PTLPOYPD5/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Kind of a 2011 version of AO-7, but without the stable orbit!\n\n73, Jim  KQ6EA\n\nOn 08/14/2011 10:18 PM, Anthony Monteiro wrote:\n> Dear Friends,\n>\n> This is speculation but it looks to me like we\n> have had a bit of good luck regarding the battery.\n>\n> Looking at the battery voltage from deployment on...\n>\n> Up until Aug 11, the battery seems to be deteriorating\n> \"normally\" with a slight downtrend in the max voltage\n> as expected. But on Aug 11, the battery voltage\n> suddenly rises up to 36 V max and the satellite\n> has started resetting in eclipse.\n>\n> I think the explanation is that the battery experienced a\n> significant event on Aug 11 where it lost the electrolyte\n> in one or more cells. If this is true, the bad news is\n> that it will no longer hold a charge and will not operate\n> in eclipse any more.\n>\n> But the good news is that without electrolyte,\n> it would also stop dendrite growth that causes\n> the eventual battery short circuit.\n>\n> In our ground testing, our test battery failed in the\n> usual way with the battery load increasing until the\n> solar panels could not drive the power bus high enough to\n> run the satellite. But interestingly, several cells also\n> cracked and dumped their electrolyte during this testing.\n>\n> If a cell on the flight battery cracked and dumped its\n> electrolyte BEFORE the shorts were formed, it should\n> stay that way and the satellite may very well continue\n> to operate in the sun until it starts to re-enter. We just\n> need some luck to avoid a bad solar angle that would cause a\n> reset in sunlight.\n>\n> Keep your fingers crossed! :)\n>\n> 73,\n> Tony AA2TX\n>\n>\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 \n> program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n\n",
    "attachments": []
}