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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XOGMAZSI3TEISMW4EUKE6C63F5IFH4B6/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "XOGMAZSI3TEISMW4EUKE6C63F5IFH4B6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FY5AFOZ2MO3OWPIYSKBA77KZS2FAACLQ/?format=api",
    "sender": {
        "address": "tosca005 (a) tc.umn.edu",
        "mailman_id": "ddd1e012a31843ce830c5bc7888b5fea",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/ddd1e012a31843ce830c5bc7888b5fea/emails/?format=api"
    },
    "sender_name": "John P. Toscano",
    "subject": "[amsat-bb] Re: AO40 replacement !!!",
    "date": "2012-09-05T15:06:56Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KYAPQRB4YFZWXUAGI5LLSYGYFBHQZR4Y/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "On 9/5/2012 8:57 AM, Kevin Muenzler wrote:\n> On Tue, Sep 4, 2012 at 3:40 PM, Kevin Muenzler\n> <[email protected]> wrote:\n>\n> In my opinion (it's worth every penny you just paid for it) if they are\n> going to create a new super sophisticated \"Phase III Part Deux\" it should\n> perhaps be taken to the ISS in pieces, assembled there and blown into a\n> long-period orbit.  But then that's just my opinion.  If I remember\n> correctly AO-40 was damaged by a collision with the launch vehicle shortly\n> after separation.  Of course a new generation of easy-sats that can be\n> worked using a J-pole setup would be nice too.\n\nKeep in mind that astronaut time is a very precious commodity, \nparticularly astronaut EVA time. I seriously doubt you'd ever get buy-in \nby the authorities to have the astronauts devote any of their precious \nEVA time to assembling an amateur satellite in orbit. Furthermore, I'm \nnot sure of the benefit of on-orbit assembly, unless you believed that \nyou could break down the satellite into such small pieces that they \ncould go along for a \"free ride\" whenever astronauts or cargo were being \nsent up. Even AO-40 would have fit into the cargo bay of the (now, \nsadly, grounded) shuttles, although its nitrogen tetroxide oxidizer and \nmonomethylhydrazine fuel would never have allowed it to fly on a manned \nshuttle.\n\nGranted, it is easier to get a ride for a 1U cubesat than another AO-40, \nand the best way to get a ride to orbit is to make the hardware as small \nand light as possible. But other than shrinking the bird, I don't think \nthat it's so much a problem of re-engineering a whole new satellite \ndesign. The design of AO-40 was incredibly good. The design failure was \nin the step-by-step commissioning process that left a fuel port cap in \nplace prior to launch which then led to the explosion that crippled the \nbird. People bemoan how \"over-engineered\" and how \"excessively complex\" \nAO-40 was, but it was precisely that complexity and over-engineering \nthat allowed us to get any use out of the bird after the explosion. \nGetting a ride to a satisfactory orbit is far and away the biggest obstacle.\n\nNow I'll get onto my soapbox for a few moments. I do not understand why \nwe keep pouring our limited resources into single-channel FM satellites. \nEven a cubesat is capable of carrying a linear transponder, and even if \nit is put into a LEO, it has to be more useful than an FM transponder in \nthe same orbit. Since the big issue is getting a ride to orbit, why not \nsend up the most capable satellite that we can within the constraints of \nthe allowable package size and weight? I mean, in the worst case, if we \nlaunched a linear transponder and \"everyone\" complained that it was too \nhard to work it, it could still be operated as a single-channel FM \ntransponder if you allowed people to transmit in FM, much as it would \nbreak my heart to allow it. You would not have lost anything by sending \nup the linear transponder. Make every launch count for as much as \npossible. Getting off my soapbox now.\n\nMy thanks go out to all the folks working behind the scenes to try their \ndarndest to get us new launch opportunities and to get new flight \nhardware built and ready to go in case a launch opportunity is found. \nThe AMSAT BOD and staff and volunteers put a remarkable amount of effort \ninto this stuff, and seldom get the acknowledgement that they deserve, \nsince major breakthroughs like the launch of an AO-40 are prevented by \nforces outside of their control. Which just means that they are working \nall the harder, *NOT* that they are slackers.\n\nAnd don't get me wrong, I think that cubesats are a good thing, \nparticularly if they are truly educational (teach us how to build \nbetter, smaller satellites), and especially if they are able to someday \nsolve the problem of sufficiently safe and effective on-board propulsion \nto achieve higher orbits. But please, try and put the best possible RF \nhardware on them when they go up! (Sorry for the short jump back onto \nthe soapbox there!)\n\n73 de W0JT\nAMSAT-NA Life Member\n\n",
    "attachments": []
}