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GET /hyperkitty/api/list/[email protected]/email/VNSQXGFRRLIUEHBI4ASNYC5FMSYGJWZL/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VNSQXGFRRLIUEHBI4ASNYC5FMSYGJWZL/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "VNSQXGFRRLIUEHBI4ASNYC5FMSYGJWZL", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/43CTXJMT5OLQ3GNXNBH6ML5GAX4U537W/?format=api", "sender": { "address": "vk3jed (a) gmail.com", "mailman_id": "e049fcabdd4648088cd7ce227ab7c655", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e049fcabdd4648088cd7ce227ab7c655/emails/?format=api" }, "sender_name": "Tony Langdon", "subject": "[amsat-bb] Re: Polarity questions", "date": "2008-09-20T09:54:42Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NI6GWAEJE4GP5GE4UWUW6Y76OQIJHU5T/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "At 04:56 PM 9/20/2008, Nate Duehr wrote:\n\n>Tony's right: Of course polarity makes a difference. It's well proven\n>physical science at this point in our RF history.\n\nIndeed. :)\n\n>If the satellite is moving, rotating, and generally \"messing up\" the\n>test, it's hard to always see the results of polarity changes -- mix\n>in trying to do it by hand, and different people's tolerance for\n>listening through noise, different receiver sensitivities, higher and\n>lower gain antennas, and pretty soon -- the whole test is pretty non-\n>objective.\n\nWell, I had a pretty good way of determining polarisation. I used to \nhand rotate the antenna through 180+ degrees, and there WAS a \ndefinite peak and null, as you'd expect. This required frequent \nadjustments, as the polarisation would shift significantly during a pass.\n\n\n>Some people may say \"not switching polarity works fine\" and on a\n>particular day, with a particular rig, antenna, satellite orientation\n>or motion, and a different set of between the ears DSP filters (ears)\n\nI can copy just about anything this side of white noise, but if I can \nimprove the signal, I will. :)\n\n73 de VK3JED\nhttp://vkradio.com\n\n", "attachments": [] }