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GET /hyperkitty/api/list/[email protected]/email/PREHVYZ4EIGD6IWA4S6AOSGBJRI64FTZ/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PREHVYZ4EIGD6IWA4S6AOSGBJRI64FTZ/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "PREHVYZ4EIGD6IWA4S6AOSGBJRI64FTZ", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/AMZGDYJTDVRYUX2WF3QHR6TONUWEXQPV/?format=api", "sender": { "address": "matt (a) ettus.com", "mailman_id": "fcfbe2ace2e140b5be16e4b6f8dcea6b", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/fcfbe2ace2e140b5be16e4b6f8dcea6b/emails/?format=api" }, "sender_name": "Matt Ettus", "subject": "[eagle] Re: [Fwd: [amsat-bb] Re: S band downlink on P3E]", "date": "2006-09-08T00:31:21Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AMZGDYJTDVRYUX2WF3QHR6TONUWEXQPV/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QQNSBRPHWIZI5SJEOGLQ7ULQVJPYDJUO/?format=api", "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QBIE4P4HVO2VOIYOEOS2UON4MPIV34AU/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "\n\nI have a few problems with this. \n\n1 - It has bad selection bias. Amateurs who are already on satellites \nand who use S-band downlinks are the ones who don't have problems with \ninterference. If they had interference, they wouldn't be on those \nbands. Additionally, people currently on satellites tend to be those \nwith lots of space for big dishes. The point here is to open this up to \npeople who won't, and would have more interference problems, since they \nlive in denser areas and can't put up big dishes with lots of \ndirectional gain.\n\n2 - Anecdotal \"evidence\" is pointless, especially since it is 5 years \nold. WiFi is a lot more popular now than it was 5 years ago.\n\n3 - Could you justify putting up an X million dollar satellite that uses \na band which is questionable at best, just because some complainers who \ndon't actually volunteer to do anything say that it works for them?\n\n4 - Why should we have to justify why we're not using a band? As we \nagreed at the SD meeting, we are looking at providing _services_ and the \nbest way to do that, not how to best make use of old hardware, which \nwouldn't be usable anyway. X-band is usable too. Why isn't anyone \nasking us to justify not using it?\n\nMatt\n\n\n\nJim Sanford wrote:\n\n>Team:\n>The kind of rational technical argument we should be prepared to answer. \n>. . .\n>\n>73,\n>Jim\n>\n>\n>-------- Original Message --------\n>Subject: \t[amsat-bb] Re: S band downlink on P3E\n>Date: \tThu, 7 Sep 2006 17:40:39 -0400\n>From: \tJeff Griffin <[email protected]>\n>Reply-To: \tJeff Griffin <[email protected]>\n>To: \t<[email protected]>\n>References: \t<01b401c6d28f$cc51d870$1001a8c0@RAFPavillion> \n><050e01c6d2ac$e29ff720$6401a8c0@KO4MA>\n>\n>\n>\n> Ok guy's, how about a test ? Why not everyone who is mode L/S capable get \n>on AO-51 between September 11, and September 18th and post all results \n>here? Or have another mode V/S session for the L band challenged? All we \n>need is degree(s) of elevation worked, type of antenna, and rx environment, \n>and quality of rx signal received. This should tell us what we want to know. \n>I don't think there is a problem, as I worked up to 10 stations a pass last \n>mode V/S session , and didn't hear anyone complain....\n>\n>73 Jeff kb2m\n>\n>\n>----- Original Message ----- \n>From: \"Andrew Glasbrenner\" <[email protected]>\n>To: \"Rick Fletcher\" <[email protected]>; \"'AMSAT'\" \n><[email protected]>\n>Sent: Thursday, September 07, 2006 2:38 PM\n>Subject: [amsat-bb] Re: S band downlink on P3E\n>\n>\n> \n>\n>>Rick,\n>>\n>>I am in _TOTAL_ agreement. I live in the suburbs of Tampa/St. Pete and \n>>never\n>>had an interference problem on my 3 foot dish. I have used the same dish \n>>to\n>>log well over a dozen WiFi access points in that immediate neighborhood.\n>>With properly designed equipment, all that trash on 2.4 ghz goes away with\n>>some elevation. What won't work is helixes with multiple sidelobes, and\n>>surplus dishes that let one whole polarity of noise right thru the back.\n>>\n>>Everyone knows I'm a big supporter of AMSAT, but I gotta call it as I see\n>>it. It makes me think of \"bait and switch\" to collect money for a project\n>>featuring such a popular mode and then drop it.\n>>\n>>The loss of Mode B on AO-40 caused a lot of the hardcore AO-10/AO-13 types\n>>to walk away, and that was tough to overcome. Now that we have, and we \n>>have\n>>people wanting S band, we leave them behind too. Even if it's a sound\n>>engineering decision (and that hasn't been proven to me) it's a horrid\n>>marketing decision. Bad mojo for a organization that lives on the \n>>donations\n>>of it's members.\n>>\n>>Sorry if this causes any pain to those involved with Eagle, but I needed \n>>to\n>>get it off my chest.\n>>\n>>73, Drew KO4MA\n>>AMSAT LM 2332\n>>\n>>\n>> \n>>\n>>>While AO-40 was still alive and I was working it from deep within \"Silicon\n>>>Valley\", an area blanketed by WiFi, 2.4GHz cordless phones, etc., I\n>>>discovered that a parabolic dish with a properly positioned and designed\n>>>patch feed (slightly under-illuminating the dish and having no significant\n>>>side-lobes) would bring in AO-40's S-band downlink very nicely and \n>>>cleanly.\n>>> \n>>>\n>>>Of course, other feed or antenna types such as helical antennas/feeds were\n>>>useless in that environment.\n>>> \n>>>\n>>>I have to admit that I don't buy the \"too noisy\" argument.\n>>> \n>>>\n>>>73,\n>>> \n>>>\n>>>Rick\n>>>KG6IAL\n>>> \n>>>\n>\n>_______________________________________________\n>Sent via [email protected]. Opinions expressed are those of the author.\n>Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\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", "attachments": [] }