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GET /hyperkitty/api/list/[email protected]/email/SDFHAQXCGOMJ27FT3GT2G5OKNRAEUMT2/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SDFHAQXCGOMJ27FT3GT2G5OKNRAEUMT2/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "SDFHAQXCGOMJ27FT3GT2G5OKNRAEUMT2", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/XAXPLKAJ6B6P6GW254RAYOBQOB2SQZGB/?format=api", "sender": { "address": "py2rn (a) arrl.net", "mailman_id": null, "emails": null }, "sender_name": "Eduardo PY2RN", "subject": "Re: [amsat-bb] New AO7 Distance Record", "date": "2016-02-17T01:46:14Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XAXPLKAJ6B6P6GW254RAYOBQOB2SQZGB/?format=api", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/A73WUQ45UZJDU3CYUGZK4SOW7LSRIETM/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Thanks Dave for the QSO and well done with all the persistence. \n\nIt is always good to double check even when everything is saying that it wouldn't be possible, even the computer shouting \"satellite is not visible!\" over your signal :o)\n73s\nEduardo PY2RN\n\n From: Dave Swanson <[email protected]>\n To: [email protected] \n Sent: Tuesday, February 16, 2016 8:14 PM\n Subject: [amsat-bb] New AO7 Distance Record\n \nSatellite Friends and Colleagues,\n\nI wanted to share with everyone that on February 10th, at 2009UTC I made \na scheduled contact with Eduardo, PY2RN, using AO-7 Mode B, from \n'Shinnal Mountain' just west of Little Rock, Arkansas. My 10 digit grid \nlocator for the contact was EM34ST20SC, and Eduardo's station is located \nat GG66LW77JQ in Vinhedo/SP, Brazil. Using the \nhttp://no.nonsense.ee/qth/map.html website for reference, this equates \nto 8030.895 km which we believe to be a new record for AO-7 Mode B. I've \nbeen extremely busy this past week, but I had a few folks request that I \nshare a little background behind the contact, so here we go.\n\nBack on January 24th, I was on an AO-7(B) pass looking for Gustavo, \nPT9BM. While not a record distance, Gustavo's QTH is just shy of 7500km \naway from me, so I was up on my mountain, specifically in a spot with \ngreat a great southeastern view of the Horizon. As the bird came into \nview, while scanning the passband, I heard Eduardo, PY2RN, calling CQ. I \ntried to answer him, but his signal disappeared quickly after that, and \nI went ahead and had a great QSO with Gustavo, and didn't think anything \nelse of it until later that night when I decided to look up the station \nI had heard. To my astonishment, Eduardo was 8030km away, which was way \nbeyond the theoretical range AO-7, even with elevation assistance. I \npromptly emailed Eduardo and we both agreed to try and make a contact, \neven though the math said it shouldn't be possible.\n\nAt this point the random luck that had let me hear Eduardo on the 24th \nseemed to elude us. We attempted contacts on the 26th, 28th, and 30th \nall to no avail. After recalculating windows, our next shot was on \nFebruary 8th. WinListen (from Sat32pc) calculated a 3 second window on \nthe 8th, followed by 5 seconds on the 10th. The day of the 8th came, and \nwe prepared for the attempt. Murphy once again seemed to haunt us \nthough, as we successfully heard the calls and grids of each other, but \nstrong CW QRM was hitting the bird so hard that the intelligibility was \nlow and, more importantly, neither of us had a camera running. We \ndecided to not count the QSO due to these reasons. The good news was \nthough, we both heard each other (the first time that had happened) and \nour frequency coordination was spot on. We knew it could be done, we \njust needed a little luck.\n\nFinally, on February 10th, we got a bit of a break. We had already \ndetermined that 5 seconds was simply not enough time to do a proper \"QSL \nthanks for the grid, have a great day\" type of chat, so we both agreed \nto simply repeat 'your call / my call / grid / report' rapidly, much in \nthe same way a digital or contest contact is made. At 2009UTC, both \nstations cleanly heard the others call and grid, completing the \ncontact. It was extremely rapid, and very weak, but clear. Eduardo's \nside of the QSO turned out way better than mine did, and he has uploaded \na recording of it to youtube here: https://youtu.be/pTGSlaY7K7A\n\nAfter all my work towards low-elevation contacts from mountain-tops, I \nthink this is approaching the limits of what can be done on AO-7. This \nwas by far the hardest sked I've ever attempted, and with the contact \nwindow measured in mere seconds, it leaves absolutely no room for error. \nHad I not heard Eduardo's call at random on the attempt with Gustavo, I \ndoubt I would have even pursued this as something that was possible. \nThat said, wow.. what a rush\n\nBig thanks to Eduardo, PY2RN, for humoring my obsession with making \nultra long-distance QSOs on the birds, and for sticking with it until we \nfinally made it work. Good DX my friend. Also thanks to Gustavo (PT9BM) \nfor persuading me to point my arrow to the South, and Drew (KO4MA) for \nacting as a spotter during one of the passes to see just how far apart \nwe were from each other. Appreciate it guys.\n\nIf anyone has any questions or comments, I'm happy to field them. Until \nthen, catch you on the birds! 73!\n\n-Dave, KG5CCI\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n\n \n", "attachments": [] }