Email Detail

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SABUJGHJRENIDUSQOSGVJYLKSCVRYZ6C/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "SABUJGHJRENIDUSQOSGVJYLKSCVRYZ6C",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/NMJFIWJFEXOEA4CZTVO6MQNM4UXDP6JR/?format=api",
    "sender": {
        "address": "mark (a) kk7cu.net",
        "mailman_id": "f88a1c43852246bab37f5227c2116565",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f88a1c43852246bab37f5227c2116565/emails/?format=api"
    },
    "sender_name": "Mark Lockwood",
    "subject": "[amsat-bb] Re: geo stationary bird",
    "date": "2007-11-05T13:10:43Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KBKE4R4FALHY623E7WZGB55ECWTJGZMN/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Another thing to remember is once attitude control is turned off, there is\nalso no way to keep the solar arrays pointed at the sun.  Once this happens\nthe on board computer will \"Load Shed\" and shut down everything not needed\nto regain attitude control.  Switchable antennas would not be a help.\n\nFor satellites that are out of expendables (loss of too much redundancy, or\nalmost out of fuel).  They may be kept as a spare if they are usable at all,\nor like on bird our company owns just held in the slot until a replacement\ncan be launched.  FCC and ITU require us to maintain the bird in the slot or\nwe loose the slot.  Once we stop doing maneuvers the birdwill start drifting\nand become a hazard for other spacecraft.  The operator will once this\nhappens \"SuperSync\" it, kicking it up about 300 miles above the\ngeo-stationary or \"Clark Belt\", and permanently shutting off all\nelectronics.\n\nIn my experience most satellites have enough solar array power and battery\ncapacity to run through eclipse long past end of life due to fuel exhaustion\nor some other catastrophic problem.  You can however count on the AMSAT\nPayload being a lower priority than the revenue producing payloads, and will\nbe turned off first if there is a power problem.\n\nI would support AMSAT investigating this and seeing if there is a\npossibility of it becoming a project.  I would however like to see P3E\nfinished first.\n\n\nMark\n\nOn 11/5/07, Richard Limebear <[email protected]> wrote:\n>\n> Thanks for the replies\n>\n> >     Does anyone know if retired birds are switched ON or OFF once they\n> >     get boosted into a retirement orbit ?  Could still be useful to us\n> >     even from there.\n>\n> > For us it just means we need switchable antennas that can be swapped 15\n> > years after launch.\n>\n> Accepted. We don't yet know what antenna assemblies will be permissible.\n>\n> > However, when the satellite enters eclipse, the TV etc transponders are\n> > run from the batteries. I suspect that at this point, AMSAT would be\n> > switched off or into some low power mode until the eclipse has passed.\n> > The extra battery power needed for operation of AMSAT */_and_/*  the\n> > commercial transponder  during eclipse would require a significant mass\n> > increase of the on-board batteries.\n>\n> But thats the whole point of this exercise (piggy-backing inside a geo\n> bird); there *is* extra mass availability due to the launch configuration.\n>\n> Good concept and has my full support as long as P3E doesn't become a\n> victim of fund diversion.\n>\n> --\n> 73\n> Richard W L Limebear G3RWL\n> [email protected]\n> FOC # 1188\n>\n>               So many beautiful girls ... (sob) so little time\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\n\n\n-- \nMark Lockwood\nPrefect, Metropolitan Rocketry Association\nTRA # 9863\nNAR #86042\nKK7CU\n",
    "attachments": []
}