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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/URKZ53QUFIVAADK46KBWZ5JEUSJ3CR4W/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "URKZ53QUFIVAADK46KBWZ5JEUSJ3CR4W",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/URKZ53QUFIVAADK46KBWZ5JEUSJ3CR4W/?format=api",
    "sender": {
        "address": "stefan_wagener (a) hotmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "stefan_wagener",
    "subject": "[amsat-florida] Re: [amsat-bb]  AO-16 reconfigured.",
    "date": "2008-01-22T21:12:40Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Excellent work by the team!\n\nCongratulations.\n\n\nStefan, VE4NSA\n\n\n-----Original Message-----\nFrom:\t\"[email protected]\" <[email protected]> on behalf of\t\"Andrew Glasbrenner\" <[email protected]>\nSent:\tTuesday, January 22, 2008 6:47 PM\nTo:\t\"[email protected]\" <[email protected]>, \"[email protected]\" <[email protected]>\nCc:\t\"[email protected]\" <[email protected]>, \"ans-editor\" <[email protected]>\nSubject:\t[amsat-bb]  AO-16 reconfigured.\n\nSince AO-16 was recovered approximately 6 months ago, the command team has \nattempted to reload the satellite software almost a dozen times without \nsuccess. Subsequently a series of memory tests were performed which points \ntowards a hardware failure which prevents restarting the spacecraft software \nsuccessfully. This team included Bruce Rahn WB9ANQ and Jim White WD0E \nadvising Mark Hammond N8MH as the primary groundstation. Mark put in many \nearly hours during the multiple reloads and test sessions, with Bruce, Jim, \nand others advising. Thank you to all involved for your hard work.\n\nAfter the conclusion that the spacecraft computer system was damaged and as \ndiscussions about decommissioning were taking place, Jim recalled a series \nof low level commands included in the spacecraft design by Tom Clark, K3IO \nduring construction. One of these commands allows an uplink receiver to be \ndirectly tied to a downlink transmitter. The twist is that the uplink is \nregular FM but the downlink via the BPSK transmitter is DSB (Double \nSideband). Mark placed the satellite in this mode early this week and some \ntesting was undertaken. The satellite hears VERY well, and the reduced \nbandwidth by using either USB or LSB on the groundstation receiver allows \nfor a very robust downlink. Tuning the downlink is just like on a linear \ntransponder, meaning it is tight and with fast Doppler. Uplink tuning is not \nrequired, just as with the FM mode V/U satellites. QSOs were made between \nN8MH, WD4ASW, KO4MA, K5QXJ, and WA6FWF. My personal observations include \nbeing able to access and hear the satellite within one degree of the \nhorizon, much lower than any other current bird for my QTH. This should be \nan easy satellite with omni antennas and a 70cm preamp.\n\nWith that explanation, I'm happy to open the satellite to general use on \nvoice for a test period. Please submit reports either to the -bb or to \[email protected] . The uplink is 145.920 FM, and the downlink is 437.026 SSB \n+/- Doppler shift. Please restrict your uplink power to a reasonable level, \nand do not transmit without being able to hear the downlink. All the general \nsingle-channel guidelines apply. Enjoy this bird's new life!\n\n73, Drew KO4MA\nAMSAT-NA VP Operations \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\n\n",
    "attachments": []
}