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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WP4MCFWMGCV5KMMZXAA3V23XBBKKPENR/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "WP4MCFWMGCV5KMMZXAA3V23XBBKKPENR",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/WP4MCFWMGCV5KMMZXAA3V23XBBKKPENR/?format=api",
    "sender": {
        "address": "N2OEQ (a) aceweb.com",
        "mailman_id": "e63b1ea442884559874553314efaac46",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e63b1ea442884559874553314efaac46/emails/?format=api"
    },
    "sender_name": "Patrick McGrane",
    "subject": "[amsat-bb] Re: Future radical satellite designs",
    "date": "2007-07-08T16:40:09Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "hi maggie- sorry for being short with you. Thank you for the more detailed \nposting. For low power sleep mode or standby of control electronics, super \ncapacitors become more practical and longer lasting than batteries. I \nbelieve someone in the group has or is experimenting with supercaps.\n\nOne possible group to approach for inclusion of an auxilliary payload is \nNOAA since they are prolific satellite builders and have a preexisting \nrelationship with the amateur community. Take care, pat\n\n\n\n------- Original Message -------\n>From    : Margaret Leber[mailto:[email protected]]\nSent    : 7/8/2007 10:05:41 AM\nTo      : [email protected]\nCc      : \nSubject : RE: [amsat-bb] Re: Future radical satellite designs\n\n On 7/8/07, Patrick McGrane <[email protected]> wrote:\n> Hello maggie- I hate it when people snip or take things out of context.\n> Go back to the original entire email to absorb the reason. thanks, patrick\n\nI did read the whole thing.\n\n The challenges to amateur secondary payloads on commercial or\nmilitary spacecraft have been discussed here at length in the past.\n*My* comment was that a standalone bird *designed* without\nbattery-powered transmitters might be an interesting approach.\n\nAs it stands now we have several birds on-orbit designed with larger\nbattery systems (that have subsequently failed) that come up in\nvarious random control system states when they come out of eclipse.\nThese birds only transmit when in sunlight anyway; what if we designed\none that way on purpose? Now *that's* a \"radical satellite design\".\n\nThe payload weight that would have gone to bigger batteries to power\ntransmitters during eclipse could be used for other equipment. A\nsmaller (more reliable? certainly simpler and cheaper)  auxiliary\nbattery system could keep the control systems alive during eclipse. A\nlot of work is being done with ultra-low-power processor chips for\nmobile applications these days.\n\nImagine if AO-40 had used this approach (admittedly not at all in-line\nwith the elaborate something-for-everyone AO-40 design philosophy); it\nmight still be usable. As it is, when the complex power system failed,\nwe lost the whole bird. And the only hope of recovering it is the\noutside chance that it might fail *again*.\n\n--\n73 de Maggie K3XS\nEditor, Phil-Mont Mobile Radio Club Blurb -  http://www.phil-mont.org \nElecraft K2 #1641 -- AOPA 925383 -- ARRL 39280\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings:  http://amsat.org/mailman/listinfo/amsat-bb \n\n",
    "attachments": []
}