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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RHPCMXLMKC2ETI3TRYVAN5IVOHXPQBWL/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "RHPCMXLMKC2ETI3TRYVAN5IVOHXPQBWL",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RHPCMXLMKC2ETI3TRYVAN5IVOHXPQBWL/",
    "sender": {
        "address": "clive (a) g3cwv.co.uk",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Clive Wallis",
    "subject": "[amsat-bb]  OSCAR-11 Report",
    "date": "2010-11-01T16:02:23Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "                   OSCAR-11 REPORT   31 October 2010\n\nThis report covers the period from 30 September to 31 October\n2010. During this time the satellite has been heard from 09 to\n19 October and from 30 October. At the time of writing it is\ntransmitting and is expected to continue until 09 November.\n\nExcellent signals have been reported from stations located\naround the world, and good copy obtained from decoded telemetry\nframes.\n\nThe satellite is now transmitting during eclipses, although\nsignals are weaker at those times. This indicates that there is\nstill some capacity remaining in the battery.\n\nThe on-board clock is now very stable.  It gained only ten\nseconds in 33 days. This is comparable with its accuracy when the\nsatellite was fully operational, when it gained approximately one\nminute per year. However, there is still an accumulated loss of\n309 days, which has occurred during eclipses of the last few\nyears.\n\nOperation during eclipses and stability of the on-board clock\nsuggest that some part of the system may have recently failed\n'open circuit' thus reducing the overall power drain of the\nsystem, and allowing more power to be available during eclipses.\nThere was an unexplained current drain observed when analogue\ntelemetry was last transmitted. This fault might have cleared.\n\nThe Beacon frequencies are -\n\n  VHF 145.826 MHz.  AFSK FM  ASCII Telemetry\n\nUHF 435.025 MHz.  OFF\n\nS-band 2401.5 MHz. OFF\n\nReception reports have been received from Jeff N3QO, Rod CX2ABP\nand Ian KI4HLV/6Y5 (G4JMM) . Many thanks for those and to\neveryone who posted reports on the satellite status website. This\nis a very convenient and easy to use facility, which shows the\ncurrent status of all the amateur satellites. Strongly\nrecommended for future reports! Reports around the expected times\nof switch-on and switch-off are of special interest. The URL is\nhttp://oscar.dcarr.org/index.php\n\nOSCAR-11 transmits on 145.826 MHz., set receiver to NBFM. The\nsatellite has a characteristic sound, rather like raspy slow\nmorse code, sending \"di di dah dah dah dah dah dah dah\" sent over\na period of five seconds. If you are receiving a very weak\nsignal, switch the receiver to CW or SSB. You should hear several\nsidebands around the carrier frequency and should be able to hear\nthe characteristic 'morse code like' sound on at least one\nsideband.\n\nPlease note that you need a clean noise-free signal to decode\nthe signals, and your receiver must be set to NBFM mode, for a\ndecoder to work.\n\nIf you need to know what OSCAR-11 sounds like, there is an audio\nclip on my website www.g3cwv.co.uk/ which may be useful for\nidentification and as a test signal for decoding.\n\nThe current status of the satellite, is that all the analogue\ntelemetry channels, 0 to 59 are zero, ie they have failed. The\nstatus channels 60 to 67 are still working. The real time clock\nis showing a large accumulated error, but is now incrementing\naccurately to within a few seconds per month. The day of the\nmonth has a bit stuck at 'one' so the day of the month may show\nan error of +40 days for some dates. The time display has\nswitched into 12 hour mode. Unfortunately, there is no AM/PM\nindicator, since the time display format was designed for 24 hour\nmode.\n\nThe spacecraft computer and active attitude control system have\nswitched OFF, ie. the satellite' attitude is controlled only by\nthe passive gravity boom gradient, and the satellite is free to\nspin at any speed.\n\nThe watchdog timer operates on a 20 day cycle. The ON/OFF times\nhave tended to be very consistent. The average of many\nobservations have shown this to be 20.7 days, ie. 10.3 day s ON\nfollowed by 10.4 days OFF.\n\nListeners to OSCAR-11 may be interested in visiting my website.\nIf you need to know what OSCAR-11 should sound like, there is a\nshort audio clip for you to hear. The last telemetry received\nfrom the satellite is available for download. The website\ncontains an archive of news & telemetry data which is updated\nfrom time to time. It also contains details about using a\nsoundcard or hardware demodulators for data capture.  There is\nsoftware for capturing data, and decoding ASCII telemetry.  The\nURL is www.g3cwv.co.uk .\n\nIf you place this bulletin on a terrestrial packet network,\nplease use the bulletin identifier $BID:U2RPT150.CWV, to prevent\nduplication.\n\n73 Clive G3CWV   [email protected] (please replace xxxxx by g3cwv)\n\n\n\n\n\n\u001a\n",
    "attachments": []
}