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GET /hyperkitty/api/list/[email protected]/email/FFVQMK7TJMMN7GKCNQ72MA6BOACXRAQM/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FFVQMK7TJMMN7GKCNQ72MA6BOACXRAQM/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "DA677F1787D14B7DB30E15A469742501@WA4SCA", "message_id_hash": "FFVQMK7TJMMN7GKCNQ72MA6BOACXRAQM", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/JC22SYHGSQFT5FWGE3G3PUC57QBDXXKD/?format=api", "sender": { "address": "APBIDDLE (a) UNITED.NET", "mailman_id": null, "emails": null }, "sender_name": "Alan P. Biddle", "subject": "[amsat-bb] Re: Looking for a G3RUH dish", "date": "2012-01-05T12:14:47Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZU5ZBINCYKTAAFV4IV2F72Z6PYAUPKA2/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Doug,\n\nFODTRACK does have a GPS input for the location.\n\nhttp://ludens.cl/Electron/fodtrack/fodtrack.html\n\nNote that it is a VERY old, DOS program, but according to the web page, with\nsome effort will work with Vista and presumably WIN7. FWIW\n\nAlan\nWA4SCA\n\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Doug Faunt N6TQS +1-510-655-8604\nSent: Thursday, January 05, 2012 12:39 AM\nTo: [email protected]\nSubject: [amsat-bb] Re: Looking for a G3RUH dish\n\nSpeaking of which, can any of the available amateur software packages \nhandle a moving ground station? I'd like to be able to automate the \nantenna tracking on a boat.\n\n73, doug\n\n\nOn 05-Jan-12 05:55, Greg D. wrote:\n>\n> Hi Bob,\n>\n> I'm trying to visualize you driving (bouncing) down the freeway at 70 mph\nwith a square yard of curved (airfoil!) metal sitting at odd angles to the\nair flow, trying to aim it at a target you may not be able to see clearly,\nwhich is also moving at some rate in another direction, with an accuracy of\n+/- a half dozen degrees (which is what you get with a dish that size). I\nhad a hard enough time aiming my 30 inch BBQ grill at AO-40, from my nearly\nstationary house (this is California, after all), with up to date KEPS, a\nrotor system calibrated earlier against the position of the Sun, NBS-sync'd\nclock on a Linux PC, and so forth.\n>\n> Even if you mount the dish inside a camper minivan with a fiberglass roof\n(think mobile Radome), I don't see how this is going to work. I've seen you\ndo amazing things, but what are you thinking?\n>\n> The best use of the dish would probably be to catch the balloon payload as\nit falls from the sky...\n>\n> Greg KO6TH\n>\n>\n>> From: [email protected]\n>> To: [email protected]; [email protected]\n>> Date: Wed, 4 Jan 2012 17:54:02 -0500\n>> Subject: [amsat-bb] Re: Looking for a G3RUH dish\n>>\n>>> Regarding your Cu wire dish... you might look at\n>>> the Tek Sharp dishes as an easier alternative to \"rolling your own.\"\n>>\n>> We are after absolute minimum wind drag. I don't think the Tek dish\nwould\n>> survive accurate tracking while driving along the interstate at 70 PMPH\nto\n>> catch a balloon. And we want it to be a good 3' by 4' dish... Need the\n>> gain for the tiny wifi video link...\n>>\n>> Bob\n>>\n>>\n>>\n>> I picked one up on ebay about a year ago and put it in my attic...\nwaiting\n>> for amsat-dl :-)\n>>\n>> http://www.plumdragon.com/teksharp/hr_AO-40_products.htm\n>>\n>> Drew,\n>> I have a spare PF dish about 60 cm, but it is steel, not aluminum like\nthe\n>> G3RUH. I used it on AO-40 for 24 GHz. Let me know off-list if you want\nit.\n>>\n>> 73,\n>> Jerry, K5OE\n>>\n>> ---- previous message ----\n>> You probably have one of the K5GNA \"BBQ\" dishes. The G3RUH is a solid\nround\n>> spun dish.\n>>\n>> 73, Drew\n>>\n>> -----Original Message-----\n>>> From: Bob Bruninga<[email protected]>\n>>> Sent: Jan 3, 2012 2:19 PM\n>>> To: 'Andrew Glasbrenner'<[email protected]>, 'amsat-bb'\n>>> <[email protected]>\n>>> Subject: RE: [amsat-bb] Looking for a G3RUH dish\n>>>\n>>>> I'm looking for one of the 60cm G3RUH dishes\n>>>\n>>> Got one, (but not available).\n>>>\n>>> Questions: I measured reflector grid separation as .88 inches which\nworks\n>>> out to be about 0.18 wavelength. I always thought the grid had to be\n>>> tighter than 0.1 inches to be an effective \"surface\".\n>>>\n>>> Maybe the difference with almost double the spacing is not that\n>> significant?\n>>> (especially for a steel one which would be quite heavy.\n>>>\n>>> Reason I am asking is that I also need another S band dish (at 70 MPH on\n>> the\n>>> roof of a tracking van) and we are thinking about building one by using\nan\n>>> old solid 6' TVRO dish as a form and laying in copper wire and soldering\nit\n>>> to copper straps. With all that labor, I'd not want to get the spacing\n>>> wrong.\n>>>\n>>> Bob, Wb4APR\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\nprogram!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\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\nprogram!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \t\t \t \t\t\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_______________________________________________\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\n", "attachments": [] }