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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TTAMGD4VIZ46YH35MIMK23ZF3V7SNUFN/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "35A63A4D6CD64217A8B12D2FF43BE835@satellite",
    "message_id_hash": "TTAMGD4VIZ46YH35MIMK23ZF3V7SNUFN",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ML3CTKU4DMRMX3O4DGAA3UWTVD2ZCYX3/?format=api",
    "sender": {
        "address": "alancresswell (a) xtra.co.nz",
        "mailman_id": "0292a8a18be44d6a9fd4a622af40d892",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/0292a8a18be44d6a9fd4a622af40d892/emails/?format=api"
    },
    "sender_name": "Alan Cresswell",
    "subject": "[amsat-bb] Re: Batteries and High Power still working",
    "date": "2011-08-14T04:12:59Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ML3CTKU4DMRMX3O4DGAA3UWTVD2ZCYX3/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "ARISsat-1 in high power mode over ZL for the entire passes 14 Aug. 0201UT\nand 0337UT.  Good solid signals on both telemetry (59 and 68 frames\nuploaded) and audio channels and also heard myself OK on the transponder on\nthe 0337UT pass.  \n\n73\nAlan\nZL2BX\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Luc Leblanc\nSent: Saturday, 13 August 2011 04:55\nTo: [email protected]\nCc: [email protected]\nSubject: [amsat-bb] Batteries and High Power still working\n\n>From www.arissat1.org\n>11 Aug 2001\n\n>The Russian Silver-Zinc (Ag-Zn) battery that is powering\nARISSat-1/RadioSkaf-B is the same battery that is used to power the Russian\nOrlan \n>space suits. The battery is designed for a lifetime of 5 deep\ncharge-discharge cycles when used in the spacesuit.\n\n>Using it in a spacecraft going through 14 shallow charge-discharge cycles\nper day is new territory.\n\n12 days since activation time 14 shallow charge-discharge cycles per day\n=168 shallow charge-discharge cycles \"Is shallow = normal charge-\ndischarge?\"\n\nSome specs:\n\nSilver-zinc batteries are available off-the-shelf and have a higher specific\nenergy (130 Wh/kg) and density (240 Wh/litre) than most other \ncommonly available secondary batteries. High cost, limited cycle and shelf\nlife, and a long recharging process reduce its overall \nattraction. While at normal discharge rates, 40 to 50 cycles can be expected\nfrom the battery, this reduces to 10 or 15 at high discharge \nrates. Cycle life is also reduced if the battery is discharged below 80% of\nrated capacity and thus, a 20% reserve is required at the end \nof the mission. Silver-zinc batteries have been used extensively in AUVs and\ntheir performance is reliable and documented. Their high cost \nand short life have, however, prompted consideration of alternative\ntechnologies.\n\nP.S. At 13 Aug 2011 04:44:03 UTC  ARRISat-1 High Power mode has been\nreported over Australia\n\n\n\nLuc Leblanc VE2DWE\nSkype VE2DWE\nwww.qsl.net/ve2dwe\nDSTAR urcall VE2DWE\nWAC BASIC CW PHONE SATELLITE\n\n \n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n-----\nNo virus found in this message.\nChecked by AVG - www.avg.com\nVersion: 10.0.1392 / Virus Database: 1520/3832 - Release Date: 08/13/11\n\n",
    "attachments": []
}