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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JBLH6GX4PKA4SA6RPGWCD25KJ5KOBJZX/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "JBLH6GX4PKA4SA6RPGWCD25KJ5KOBJZX",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IP2JK47T2JHXZO5MCSQAYYCJAOXWXPTB/",
    "sender": {
        "address": "seb (a) wintek.com",
        "mailman_id": "334792c18f7f4268a405ca1814e93bd0",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/334792c18f7f4268a405ca1814e93bd0/emails/"
    },
    "sender_name": "Stephen  E. Belter",
    "subject": "[amsat-bb] Re: ARISSat-1 Deployment Scrubbed",
    "date": "2011-08-03T16:20:58Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IP2JK47T2JHXZO5MCSQAYYCJAOXWXPTB/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Tough decisions.\n\nARISSat-1 was taken to the ISS on a Progress vessel with 50-ohm terminations (dummy loads) installed on both antenna connectors.  At the ISS, the terminations were to be removed and the 2M (long transmit) antenna and 70 cm (short receive) antenna installed.  The ARISSat-1 tests used a coax cable to an ISS external antenna connected to the 2M connector on the top of the satellite.\n\nThe video of the spacewalk clearly showed the 2M antenna installed.  \n\n>From a very brief head-on video shot, it appeared that the 70 cm antenna wasn't installed.  I don't remember the size of the terminator, so I can't say if the 70 cm terminator was present, or if the antenna had been installed but broken, or if the connector wasn't terminated.  My *guess* is that the terminator is still installed.\n\nIf launched as is, I think the downlink on 2M should work with the telemetry (BPSK-1000, CW, FM voice recordings, and SSTV).  What won't work is the U/v transponder.\n\nWatching the video made it very clear how hard it is to handle the satellite \"carefully\".  So the risk (specifically mentioned by one of the cosmonauts) is that the solar panels won't survive taking the satellite back into the ISS to install the antenna and launch another day.  \n\nOne other potential scenario would be to remove the 70 cm terminator (if it is attached to the connector) and launching today.  There is a *slim* chance that high-powered ground stations might be able to be heard by the U/v transponder.\n\nTough decisions.\n\n73, Steve N9IP\n--\nSteve Belter\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On Behalf Of B J\nSent: Wednesday, August 03, 2011 11:36 AM\nTo: [email protected]\nSubject: [amsat-bb] ARISSat-1 Deployment Scrubbed\n\nApparently, an antenna went missing so it's not known if ARISSat will be transmitting properly.  Deployment might occur later during this EVA pending a decision from mission control.\n\n73s\n\nBernhard VA6BMJ @ DO33FL\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\n",
    "attachments": []
}