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GET /hyperkitty/api/list/[email protected]/email/A2V7VBQCR2LK5FLFG62627RHBET5MHAZ/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/A2V7VBQCR2LK5FLFG62627RHBET5MHAZ/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "A2V7VBQCR2LK5FLFG62627RHBET5MHAZ", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/V3CEQODDPTNLWMYMA5IJQUMGSXADW22E/?format=api", "sender": { "address": "peter.guelzow (a) kourou.de", "mailman_id": "c1ef441a593c454695e682f65935fe93", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/c1ef441a593c454695e682f65935fe93/emails/?format=api" }, "sender_name": "Peter Guelzow", "subject": "[amsat-bb] Re: Can we get them to fix AO-40 first then?", "date": "2009-10-15T11:13:09Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XMOWBE4BDE54GPGUNDA4GJFRGQHQHODA/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Uuuupsss...\n\n> Just a short remark - \"However, there is no reason to believe that the\n> satellite disintegrated,\n> since there are *now* other objects tracked around it.\"\n> \nIndeed I meant there are *no* other objects around AO-40 ;-)\n\nThanks to Graham for pointing this out...\n\n73s Peter DB2OS\n\n\n\n\nPeter Guelzow wrote:\n> Hi Samudra et all,\n>\n> very interesting article and links you've sent out.\n> So far, I did not heard about attempts to take photographs, at least not\n> in the public.\n> However, there is no reason to believe that the satellite disintegrated,\n> since there are now other objects tracked around it.\n>\n> The command stations regularly sent commands to AO-40 in the last years,\n> but I guess with larger time between those attempts now.\n> AO-40 was launched with the IHU \"hot\", that means: After separation and\n> release of the safety/separation switch, the 24V power for the\n> transmitter was switched ON and after some waiting time, the Beacon was\n> commanded ON by the IHU (integrated housekeeping unit).\n> The electronics were designed that way, if for example the IHU crashes,\n> the I/O ports will remain in their last state and the transmitter would\n> be kept on.\n> However if there is a complete power loss (as we expect with the battery\n> shortened), all Output ports will indeed reset to their default state,\n> which is \"all off\"...\n> (The BCR's default values normaly should still produce enough power)\n> For this reason, the command stations prepared a small boot-block for\n> the IHU to configure the BCR (battery charge regulator) and the\n> Trasmitter status, for example S-band Beacon On.\n> If this would be successful, command stations could start to reload the\n> IHU, etc.. \n> We also still plan to use our 20m dish in Bochum to uplink commands with\n> high power or listen for some week signals.\n>\n> 73s Peter DB2OS\n>\n>\n>\n> Samudra Haque wrote:\n> \n>> Has there been any serious attempt to take a photograph of the damaged\n>> bird using ground based optical telescopes while it is in sunlight ?\n>> With modern telescopes such as\n>> http://www.refractortelescopes.co.uk/reviews/orion/orion-shorttube-80-a-refractor-telescope/\n>> or similiar and a modern digital camera and a known RA/DEC co-ordinate\n>> of the satellite at any point in its orbit, it should be possible get\n>> a fairly decent picture of what is still up there...\n>>\n>> Note RA / DEC are astronomy co-ordinates which should be able to be\n>> calculated from AZ/EL or TLE, but I may not be able to do it myself.\n>>\n>> We don't need to track it, but just to image it in several consecutive\n>> frames. From: http://www.emergentspace.com/pubs/AIAA_GNC_2002_AMSAT_A040.pdf\n>>\n>> Table 1. Nominal Orbit Parameters for AO-40\n>> Orbit Parameter Value\n>> Semimajor Axis (km) 36,245\n>> Perigee Height (km) 1,042\n>> Apogee Height (km) 58,691\n>> Eccentricity 0.797\n>> Inclination (deg) 6.04\n>> Period (hours) 19.1\n>>\n>>\n>> On Wed, Oct 14, 2009 at 9:49 PM, Rocky Jones <[email protected]> wrote:\n>> \n>> \n>>> I think both those things are accurate.\n>>>\n>>> Robert WB5MZO\n>>>\n>>> \n>>> \n>>>> Date: Wed, 14 Oct 2009 21:31:30 -0400\n>>>> From: [email protected]\n>>>> To: [email protected]\n>>>> Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?\n>>>>\n>>>> I guess I need to go back and read the archives because what I remember\n>>>> reading didn't give me any hope AO-40 would ever be back. Wasn't there\n>>>> something about that they believed the spacecraft was leaking corrosive\n>>>> fuel? Doesn't sound to conducive to any type of recovery of anything\n>>>> where electronics are involved.. I also thought there was talk of a\n>>>> \"catastrophic explosion\".\n>>>> Michael, W4HIJ\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>>> Hotmail: Powerful Free email with security by Microsoft.\n>>> http://clk.atdmt.com/GBL/go/171222986/direct/01/\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>> 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> _______________________________________________\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", "attachments": [] }