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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IMVSTFBX2C6HKLTWXCJOTXPC6GR256OE/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "IMVSTFBX2C6HKLTWXCJOTXPC6GR256OE", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/V3CEQODDPTNLWMYMA5IJQUMGSXADW22E/", "sender": { "address": "myles.landstein (a) gmail.com", "mailman_id": "cb9b30d952874ae18d5acc7eda29ec0e", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/cb9b30d952874ae18d5acc7eda29ec0e/emails/" }, "sender_name": "myles landstein", "subject": "[amsat-bb] Re: Can we get them to fix AO-40 first then?", "date": "2009-10-16T01:01:22Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Y6XHOORNNF7A25ZZVWW36YWGGCNHXF6Z/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "if a 'special' camera is required, often, cameras (even really \ngood ones, or special purpose )\n can be rented for a short time for a very very reasonable rate\n\n\nOn Oct 15, 2009, at 6:53 PM, Samudra Haque wrote:\n\n> I reached out today and talked to a professional astronomer, and here\n> is the response. Before we start a project to actually take a detailed\n> photo of the AO-40 in Space, could someone work with me directly to\n> determine the coordinates that we could provide as requested:\n>\n>>>\n> Hi Samudra,\n>\n> We would have to know the exact coordinates ahead of time, point the\n> telescope there, then start imaging as it flies through the field of\n> view.\n>\n> Since we've never done it, I don't know how doable it actually is. I'm\n> pretty certain we don't have the cameras...\n>\n> It's possible, but we would need more info and possible differetn \n> equipment.\n>\n>>>\n>\n> The group I approached is a reputable one associated with their own\n> observatory, locally to the Washington DC area. If anyone is\n> interested to help out with the mathematics required, please contact\n> me directly at [email protected]. I know of two other groups who can be\n> approached locally, but we must given them all the details of\n> size/configuration etc. Could be an interesting intellectual challenge\n> while people are waiting for new sats to be designed.\n>\n> -samudra\n>\n>\n> On Thu, Oct 15, 2009 at 5:30 PM, Peter Guelzow <[email protected] \n> > wrote:\n>> Hi Robert,\n>>\n>> that's indeed the big question... We do not know in which \n>> attitude the\n>> spacecraft is.. is it still spinning very slowly or tumbling? \n>> What is\n>> the Solar-ß-Angel?\n>> If the S/C has a good orientation to the sun and the battery opens, \n>> than\n>> there should be enough power to operate the IHU and Beacon etc... do\n>> some magnetorquing to improve attitude.\n>> Something like this was done when AO-10 was hit by the last rocket\n>> stage, spinning the wrong direction with sun directly on top and \n>> almost\n>> no power...\n>> Unfolding the solar panels would give very high power only when \n>> they are\n>> oriented towards the sun. With folded solar arrays, all panels \n>> around\n>> the satellite can still see the sun around it's spin axis.\n>> Only when it shines on top or bottom, we will have problems...\n>>\n>> 73s Peter\n>>\n>>\n>>\n>> Rocky Jones wrote:\n>>> Peter.\n>>>\n>>> In the current configuration (or the last known config) of the \n>>> vehicle\n>>> does the vehicle have sufficient solar illumination to \"spin\" and\n>>> maintain the DC busses without a battery?\n>>>\n>>> Robert WB5MZO\n>>>\n>>> ------------------------------------------------------------------------\n>>> Hotmail: Powerful Free email with security by Microsoft. Get it now.\n>>> <http://clk.atdmt.com/GBL/go/171222986/direct/01/>\n>>\n>>\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the \n> 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\nMyles Landstein\[email protected]\nplease note my new email address\ndti will soon be eliminated , gmail is my new home update your dir\n\n", "attachments": [] }