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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FFA7JLBMMK6KRNCXYXKQB2HOH6QWSV7P/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "FFA7JLBMMK6KRNCXYXKQB2HOH6QWSV7P",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FFA7JLBMMK6KRNCXYXKQB2HOH6QWSV7P/",
    "sender": {
        "address": "clive (a) g3cwv.co.uk",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Clive Wallis",
    "subject": "[amsat-bb] OSCAR-11 Report",
    "date": "2014-03-10T10:45:10Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "                OSCAR-11 30th BIRTHDAY REPORT\n\n\nOSCAR-11 (AKA UoSAT-2 and UO-11) celebrated it's 30th\nbirthday in space on 01 March! It was designed, built and\nlaunched within a period of six months, using commercially\navailable 'off the shelf' components (COTS). Once again,\ncongratulations to Professor Sir Martin Sweeting G3YJO, his\nteam at the University of Surrey and the groups of radio\namateurs who also contributed to the project.\n\nThis report covers the period from 01 January 2013 to 05\nMarch 2014. During this time there have been no significant\nchanges apart from the gradual drift of the on-board clock.\nThere was also an advance of one day in the displayed date.\nThis was caused by a known leap year problem in the date\nchip, which has always existed since launch. Owing to the\nlarge accumulated time/date error 29 February 2012 on the\nsatellite occurred in January 2013 on earth!  The satellite\nhas been transmitting on a regular cycle of 10.35 days on\nfollowed by 10.35 days off.\n\nGood copy has been obtained obtained from decoded telemetry\nframes and many reports have been posted on the DCARR\ngeneral satellite status website,\n\nThe satellite continues to be subjected to eclipses during\neach orbit, resulting in weaker signals at those times.\nDuring the winter in the UK the evening passes were in the\nearth's shadow, and very weak signals have been received,\nwhich could not be demodulated and could be only detected\nwith the receiver in CW mode . As the longer daylight hours\nof summer approach, the evening passes in the UK should\ngradually become clear of eclipses, resulting in stronger\nsignals. Eclipses are expected to continue until 2019.\n\nThe on-board clock gained 98 seconds during the 14 month\nreporting period, which is comparable with the 60 seconds\ngain per year when the satellite was launched. There is\nhowever a large accumulated error of 307.54090 days slow.\nThis was caused mainly by the clock stopping during\neclipses, when there was also an unknown drain on the power\nsupply. The units of the least significant digit correspond\napproximately to seconds (0.86 seconds actually).\n\n\nAt the present time, while OSCAR-11 is operating in a\npredictable way, please DO NOT send reports or files by\ne-mail. However, could all listeners continue to enter their\nreports on the general satellite status website. This is a\nvery convenient and easy to use facility, which shows the\ncurrent status of all the amateur satellites, and is of use\nto everyone. Reports around the expected times of switch-on\nand switch-off are of special interest, especially for times\n13:00 to 18:00 and 22:00 to 08:00 UTC, to when the satellite\nis out-of-range in the UK . The URL is\nhttp://oscar.dcarr.org/index.php\n\nThe VHF beacon frequency is 145.826 MHz.  AFSK FM ASCII\nTelemetry. The satellite is operating in the default mode,\ncontrolled by the watchdog timer, with a cycle time of 20.7\ndays. 10.35 days on followed by 10.35 days off.\n\nAn extended version of this report is available on my\nwebsite, and new listeners to OSCAR-11 should read this for\nfurther information. The URL is www.g3cwv.co.uk/oscar11.htm\n. This page contains links to the report, a short audio clip\nto help you identify the satellite and a file of recent\ntelemetry received. The website also contains an archive of\nnews & telemetry data which is updated from time to time,\nand details about using a soundcard or hardware demodulators\nfor data capture. There is also software for capturing data,\nand decoding ASCII telemetry.\n\nThe easiest way to check whether OSCAR-11 is operational is\nto look at the General Satellite Status website\nhttp://oscar.dcarr.org/index.php .\n\nIf you place this bulletin on a terrestrial packet network,\nplease use the bulletin identifier $BID:U2RPT159.CWV, to\nprevent duplication.\n\n73 Clive G3CWV [email protected] (please replace the x's by g3cwv)\n\n\n\n\n\n\u001a\n",
    "attachments": []
}