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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3VKLIYBVWU4KRRH5CULCDVSCIPML4YJK/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "3VKLIYBVWU4KRRH5CULCDVSCIPML4YJK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/CTYQYBSWQBJYOLXWUURZ3FLWKJ5RWGFC/",
    "sender": {
        "address": "n5x (a) psu.edu",
        "mailman_id": "4d26d31553d84fcfa7bca78217bc20c2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4d26d31553d84fcfa7bca78217bc20c2/emails/"
    },
    "sender_name": "James C. Mankin",
    "subject": "[amsat-bb]   Re: Could we raise orbit thru magnetorque?",
    "date": "2007-02-22T00:25:11Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/CTYQYBSWQBJYOLXWUURZ3FLWKJ5RWGFC/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Here is a link I found to using current carrying tethers for changing \norbits.\n\n<http://science.msfc.nasa.gov/newhome/headlines/ast08sep97_1.htm>http://science.msfc.nasa.gov/newhome/headlines/ast08sep97_1.htm\n\nJim  KB3KJ\[email protected]\n\n\nMarc Vermeersch wrote:\n> Hi Jim,\n>\n> Is this the same principle? I believe this has to do with the gravitational\n> field not the magnetic field.\n>\n> -----Original Message-----\n> From: [email protected] [mailto:[email protected]] On\n> Behalf Of James C. Mankin\n> Sent: Wednesday, February 21, 2007 7:16 PM\n> To: Bruce Bostwick\n> Cc: [email protected]\n> Subject: [amsat-bb] Re: Could we raise orbit thru magnetorque?\n>\n> I seem to remember back when they were testing tethered satellites from \n> the Shuttle that one of\n> the possible applications being discussed was that if you could deploy \n> enough wire and put the\n> right current through it that it was possible to change orbits.   I dont \n> see why it wouldnt work if\n> a large loop of wire could be created say between three satellites in a \n> triangle.\n>\n> Jim Mankin\n> [email protected]\n>\n> Bruce Bostwick wrote:\n>   \n>> That's been my understanding as well.  Magnetorquing by itself can  \n>> drive rotation but not translation.  Its main benefit is that it  \n>> saves propellant, weight, and complexity, as well as moving parts and  \n>> the risk of a hypergolic plumbing assembly exploding and taking out  \n>> half the spacecraft's systems, by allowing the spacecraft to handle  \n>> rotation with more reliable torquing coils and get its energy for  \n>> that from the PV panels.  Changing orbits still requires firing a  \n>> reaction thruster of some sort.\n>>\n>> On Feb 20, 2007, at 9:47 AM, John Mock KD6PAG wrote:\n>>\n>>   \n>>     \n>>>> Argument is:  if when satellite is in the north, a north magnetic  \n>>>> field is\n>>>> applied on z plane, will satellite raise orbit ? Same but opposite  \n>>>> on south.\n>>>> Considering limited energy available could this raise be  \n>>>> significant if\n>>>> applied on all orbits ?.\n>>>>       \n>>>>         \n>>> I believe magnetorquing can only change the orientation of a  \n>>> satellite and\n>>> not its orbit.  It is certainly used in the process of changing an  \n>>> orbit,\n>>> in order to get a thrusting device pointing in a direction where it  \n>>> will\n>>> do something useful. But by itself, it can't change an orbit.  It  \n>>> can help\n>>> point antennas in the proper direction, etc.\n>>>\n>>> \t\t         -- KD6PAG  (Networking Old-Timer, Satellite QRPer)\n>>>     \n>>>       \n>> \"People don't like to be meddled with. We tell them what to do, what  \n>> to think, don't run, don't walk. We're in their homes and in their  \n>> heads and we haven't the right. We're meddlesome.\" -- River Tam,  \n>> \"Serenity\"\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>\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",
    "attachments": []
}