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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MGHOZV4GNOCRW5GZZ7XOARISQDFLGKLY/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "MGHOZV4GNOCRW5GZZ7XOARISQDFLGKLY", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OTYTGCXZIN2XPHIPEAYAFQ632QSDABAZ/", "sender": { "address": "wb4gcs (a) amsat.org", "mailman_id": "87014499e012476c8198fad186f7f963", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/87014499e012476c8198fad186f7f963/emails/" }, "sender_name": "Jim Sanford", "subject": "[eagle] Re: Team Speak tomorrow night", "date": "2006-09-13T00:30:19Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KAV7I6UIA732HOX2VJNX3MM3I3RJYXZ6/", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MEYXW6HDVCFHODTPK6XFPVKFEXVQ2HS6/", "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/E323STXEALEEQQMZUSLSJFOBI7LFOC2R/" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Roger.\nLet's discuss tonight.\n\n\nRick Hambly (W2GPS) wrote:\n\n>Jim,\n>\n>I just got off the phone with Graham Shirville in England. He, Howard Long\n>and others have been taking note of the controversy on amsat-bb and want to\n>offer help, if it would be productive.\n>\n>Based on that conversation and conversations with you and Bob, I would like\n>to make a revised proposal for consideration by the Eagle team.\n>\n>a) Move C-C Rider's primary uplink to the S2-band (3400-3410 MHz) with some\n>modest additional uplink capability on L-band (1260-1270 MHz).\n>\n>b) Add another separate SDX transponder for mode L/S, essentially identical\n>to the U/S SDX transponder. This transponder would use fixed antennas and so\n>will be usable only at apogee. It would also serve as a backup command and\n>control access to the IHU. By being separate it would reduce the risk of\n>common component failures. \n>\n>Graham will inquire of the local authorities in England about getting\n>matching Amateur Satellite status for their S2 band. \n>\n>Graham will come to San Francisco prepared to discuss an evolving\n>comprehensive plan to petition the ITU for additional Amateur Satellite\n>frequency allocations. He will need our help with this and we will need\n>ARRL's help as our ITU representative.\n>\n>Rick\n>W2GPS\n>AMSAT LM2232\n> \n>-----Original Message-----\n>From: [email protected] [mailto:[email protected]] On Behalf Of\n>Jim Sanford\n>Sent: Monday, September 11, 2006 10:35 PM\n>To: Lyle Johnson\n>Cc: EAGLE\n>Subject: [eagle] Re: Team Speak tomorrow night\n>\n>Lyle:\n>Per my notes, we did NOT kill the L uplinkfor SDX. We DID decide not to \n>use it for the digital package.\n>\n>We need to decide on whether or not there will be an L-uplink for the \n>narrow band package or a dedicated L/S TSFR package.\n>\n>I'd like to at least discuss, and maybe decide whethe or not to fly an L \n>uplink on the command/analog channel. Bob and Rick are proposing \n>OFFERING a L/S package to be developed by others and flown in a TSFR \n>space if it qualilfies. I see this as no cost, huge gain in both \n>perceptions and capability.\n>\n>Please join tomorrow and comment. I want to hear your thoughts!\n>\n>Thanks & 73,\n>Jim\n>[email protected]\n>\n>\n>Lyle Johnson wrote:\n>\n> \n>\n>>>> We offer that anyone willing can develop and submit for \n>>>>testing and qualification a stand-alone L/S transponder to fly in \n>>>>one of the TSFR slots, using fixed antennas. It would be usable \n>>>>at/near Apogee, like the microwave packages on AO-13 and A)-40. \n>>>>What do you think? Les's discuss this.\n>>>> \n>>>>\n>>>> \n>>>>\n>>>Bad idea. We discussed having ONE SDX transponder and ONE digital \n>>>communications payload. If for some reason it is decided that the \n>>>DCP is on neither S1 nor L (which itself would be a bad idea...), AND \n>>>it was decided that there was a desire for old-style transponders on \n>>>L/S, then it makes sense to build it as part of the SDX, and not have \n>>>a THIRD payload.\n>>> \n>>>\n>>Like Matt, I am not in favor of this. We need to design the system \n>>for services, not design the spacecraft as a bus for a collection of \n>>modules.\n>>\n>>I recall two SDX payloads, but I'm old and my memory is failing. The \n>>Eagle block diagram from Oct 2005 shows a pair of SDX modules, and the \n>>SDX block diagram shows a U and an L uplink, an S1 and a V downlink. \n>>Of course, at that time the digital payload was to be C/C.\n>>\n>>Did we decide to kill the L uplink for SDX/analog use in San Diego? I \n>>recall that we decided to not use an L uplink for the digital system.\n>>\n>>73,\n>>\n>>Lyle KK7P\n>>\n>>\n>> \n>>\n>_______________________________________________\n>Via the Eagle mailing list courtesy of AMSAT-NA\n>[email protected]\n>http://amsat.org/mailman/listinfo/eagle\n>\n>\n> \n>\n\n\n", "attachments": [ { "email": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MGHOZV4GNOCRW5GZZ7XOARISQDFLGKLY/", "counter": 2, "name": "attachment.html", "content_type": "text/html", "encoding": "us-ascii", "size": 4591, "download": "https://mailman.amsat.org/hyperkitty/list/[email protected]/message/MGHOZV4GNOCRW5GZZ7XOARISQDFLGKLY/attachment/2/attachment.html" } ] }