Jim, Exactly. The openings may last 30-60 minutes, in general, but the path between any two specific stations is typically short-lived. The geographic footprint may have a radius of 100 km or so at either end, and moves with time.
The reason I'm continuing this seemingly off-topic discussion is to get to a point that may be relevant to the investigation of the incorrect RST_RCVD values: Because of the difference in population density, NA stations receive large pileups of JA callers during these openings. I think the queue (maybe "stack" would be more appropriate) in this opening reached a maximum of 7 JA callers, but in previous openings it has reached as high as 24. These openings are a very busy time for my particular instantiation of WSJT-X, and it's possible that the computational load may partially explain why the RST_RCVD values were incorrect during the JA run, but correct both before and after it. Ed N4II. -----Original Message----- From: Jim Brown via wsjt-devel <wsjt-devel@lists.sourceforge.net> Sent: Saturday, July 17, 2021 6:29 AM To: jan0--- via wsjt-devel <wsjt-devel@lists.sourceforge.net> Cc: Jim Brown <k...@audiosystemsgroup.com> Subject: Re: [wsjt-devel] WSJT-X 2.5.0-rc3 RST_RCVD logging issue On 7/17/2021 2:59 AM, jan0--- via wsjt-devel wrote: > It is characteristic of this propagation phenomenon between NA and AS > on 6m that the opening between any given pair of stations is brief: > One or two minutes is not uncommon. That depends a LOT on which part of the US and which DX country. Here in NorCal and other areas along the West Coast, JA openings often last 30-60 minutes, and often local to specific grids, and shift around over time. This is litle different from the double-hop openings from here to eastern NA, except that our openings it to northern EN and FN grids tend to be short, few, and far between. And similar to your JA openings, our EU and AF openings are VERY short and very rare. You're very lucky if you have prop long enough to wait through one QSO, then start and finish your own. I had that experience yesterday with CU2AP, my second EU (first was EA6). I wasn't sure that he copied my RR73, but I copied his R and my report, so I logged it. It was on LOTW the next morning, so I guess he did. :) Rapidly changing propagation is a characteristic of 6M. Understanding that explains a lot, including all the concerns about signal reports that vary a lot. 73, Jim K9YC _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
