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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5SC73TI2FSBPVNQOGDYWB4YLPA5AVZN4/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "5SC73TI2FSBPVNQOGDYWB4YLPA5AVZN4",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ML6D6CT3PEVJVAY5VKKOOQFVV46AJXBI/",
    "sender": {
        "address": "JamesDuffey (a) comcast.net",
        "mailman_id": "16d2718d7d4a47dca8f564d867aacfe2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/16d2718d7d4a47dca8f564d867aacfe2/emails/"
    },
    "sender_name": "James Duffey",
    "subject": "[amsat-bb] Re: Question",
    "date": "2009-05-06T02:17:19Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YIYZEKOEPUBCIPKMKI6JYZLZUMK6ZI3X/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZPJKDHBBOYM3KEI4FC5PDN2G6Q4W3UNS/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Well more power means more solar cells and bigger batteries.\n\nThe number of solar cells that one can fit on the outside of a  \nsatellite depends on the size of the satellite. More solar cells means  \na bigger spacecraft or deployable cells. There is a limit to the size  \nof deployable panels and added complexity risks the mission if they  \nshould fail. Bigger spacecraft cost more to build and launch.\n\nThe size of the solar panels determines the battery size. Ideally you  \nwant a battery that can be fully charged by the solar cells while in  \nsunlight and maintain its charge to a useful level in eclipse. Bigger  \nbatteries weigh more and weight pretty much determines how much a  \nsatellite costs, particularly the launch costs.\n\nSo it pretty much boils down to optimizing the solar panel/battery  \ncombination with the size of the spacecraft and the mass lift  \ncapability available to us on a launcher.\n\nI am not sure what you mean by extraordinary measures to receive, or  \nwhat satellite you are trying to receive, but the requirements to  \nreceive many satellites is modest. Low loss feedline, helps, as do  \ndirectional antennas and preamps, but these are all available with  \nmodest effort, either through building them yourself or purchasing  \nthem. - Duffey\n\n>\n>   Okay, time for my stupid question of the week.\n>\n>\n> Why are our sats so low powered? Why don't we have better batteries,  \n> solar\n> power systems, or generators?\n>\n> Seems our sats are so low powered they require extraordinary  \n> measures to\n> receive.\n>\n> Is this an accurate perception?\n>\n> Dave\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\n--\nKK6MC\nJames Duffey\nCedar Crest NM\n\n\n\n\n\n",
    "attachments": []
}