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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7DY4F7UAN2LWJ3WWCCR4TIABQVJKDKTC/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "7DY4F7UAN2LWJ3WWCCR4TIABQVJKDKTC",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ELJMLI6UHSIV6G5YOMJIGG7KCYWIXU44/",
    "sender": {
        "address": "fjamesa (a) telstra.com",
        "mailman_id": "fd317f67ee3044b3b40e270e1fbe2d0c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/fd317f67ee3044b3b40e270e1fbe2d0c/emails/"
    },
    "sender_name": "James McBride",
    "subject": "[amsat-bb] Re: ARISSat-1",
    "date": "2011-08-27T14:07:31Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ELJMLI6UHSIV6G5YOMJIGG7KCYWIXU44/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi all,\nI found this morning in VK6 (approx. 03:45 UTC) the MET counter said \n21min 45 sec, which is approx. the time ARISSat-1 would have come back \ninto Sunlight. Strange thing is it was on High Power - got plenty of \ntelemetry frames but was discharging at a great rate of knots.. Looking \nat the data it would seem there was more discharging than charging going \non over it's first 21 minutes. 1 panel said 45v, the others were around \n15v so the part that was facing direct sunlight was good. I will get \nanother chance perhaps in a few hours to see if it's still alive when \nnot in sunlight and will try to grab some more telemetry.\n\nI have a jpg screenshot of telemetry with the position info from earlier \nif anyone would like it.\n\n73\nJames VK6FJA\n\n\nOn 27/08/2011 7:33 PM, Pete MI0VAX wrote:\n> Hi Carl,\n>\n> I've seen this recently myself too.. On the occasions when it happened here\n> over the UK, the bird \"should\" have been in high power mode, but after\n> looking at telemetry it appears that it had switched into low power mode\n> much earlier that than usual, from memory the footprint was only half in\n> eclipse. Also noticed that before it cuts off that there is usually 10-15 or\n> so seconds of a silent carrier. On another occasion it cut out halfway\n> through a SSTV transmission - this I'm almost certain shouldn't have\n> happened due to the way the firmware was written.\n>\n> Perhaps a bad solar panel contributing to low voltage when approaching\n> eclipse? I had noticed one of the panel temps was over 75c on several\n> passes.\n>\n> It certainly looks like there is some intermittent problems beginning to\n> raise their head, lets hope it's not a steady decline in the bird's\n> performance as gathering the SSTV pics, telemetry etc has been a very\n> enjoyable change to the usual FM/SSB activity.\n>\n> 73 de Pete\n>\n> Mi0VAX\n>\n>\n> On Sat, Aug 27, 2011 at 3:59 AM, Carl Rimmer<[email protected]>  wrote:\n>> I was having a really good pass gpong from  my NW-SE and I had copied 6\n>> frames of Telemetry and 5 frames of KURSK data when the bird just went\n>> silent.  It never came back during this pass.  It was the 08-27-2011 0241\n>> UTC pass over Lake Erie.  I am curious if anyone has heard it since than.\n>>   That is probably the best I have copied it since day one.  The frames\n> where\n>> forwarded.  The MET was 55' 33\".  Bat Voltage = 35.668; Bat Current = -16\n>> ma.  I've never heard it just go silent like that and not come back up.\n>>\n>> Carl W8KRF\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> _______________________________________________\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",
    "attachments": []
}