“Had a good overnight low noise RX session… almost like it was winter.” – Ken, SWL-EN61, in Indiana
Like Ken, many of us on 630-meters received the nice surprise of a quiet band with good propagation and reports at high S/N levels. Many reports were, at least at my station, high even by Winter standards. What makes the session even more bizarre is that we continue to flirt with geomagnetic storm conditions as a worst case and unsettled conditions at best where the Bz is pointing to the South, strongly in some cases. Solar wind velocities peaked above 500 km/s but have decreased to below that level during the preparation of this report. John, WA3ETD / WG2XKA, reported a flat session from his station in Vermont so perhaps this is a reminder that high latitude conditions continue to struggle after the recent geomagnetic activity. I should note that John was reported here at my station in Texas during the evening which often represents a pretty good session ahead. Texas is a very long way from Vermont.
Phil, VE3CIQ, reports that most of his decodes were in the East with six WSPR stations decoded and 21 unique stations decoding his signal through the session.
Neil, W0YSE/7 / WG2XSV, continues his great run at 200 mW ERP which should bring hope to any station that thinks they might not be able to be successful at MF.
Doug, K4LY / WH2XZO, reports a good session from South Carolina and hopes to evaluate his new E-probe shortly.
Mark, WA9ETW, reported nine unique WSPR stations decoded when he QRT’ed near 0430z.
Ken, K5DNL / WG2XXM, reported that he decoded eleven WSPR stations and was decoded by 39 unique stations during the session.
Larry, W7IUV / WH2XGP, reported that he decoded eight WSPR stations and was decoded by 39 unique stations, including reports from three VK stations.
Don, WB3FTQ, a recent addition to the 630-meter receive corp, sent a nice email with details of his station and screen captures of his receptions, included below. Don reports that he is listening with an 80/40-meter fan dipole at 35-foot where the ends are oriented at 0/180-degrees true. His receiver is a Flex 6700.
WSPR activity dominated the session once again with 70 MF WSPR stations observed worldwide at 0100z. No confirmed new stations were observed during the session but KC1ANM, NV1O, and N6IO/M are believed to be returning stations from previous sessions earlier in the season.
Regional and continental WSPR breakdowns follow:
There were no trans-Atlantic or trans-African reports during this session. UA0SNV was reported as listening but no reports were found in the WSPRnet database.
What a difference a day makes for Eden, ZF1EJ, as quieter conditions prevail, yielding reports across North American in addition to WH2XCR.
Laurence, KL7L / WE2XPQ, received and provided reports to the usual cast of stations in the western portions of North America and Hawaii.
Merv, K9FD/KH6 / WH2XCR, received pre-sunset reports from John, VK2XGJ, starting at 0726z (sunset at 0744z). Merv reports that he continued to receive reports from Australia until 1622z, 12 minutes after his local sunrise. Two-way reports were plentiful, with VK3ELV and VK4YB. Additional reports were received from WE2XPQ, JH3XCU and VK2DDI in the Pacific region. Merv also received reports from the eastern portions of North America in addition to ZF1EJ.
In Australia, Phil, VK3ELV, and Roger, VK4YB, exchanged two-way reports with WH2XCR while Phil received additional reports from JH3XCU, JH1INM, and TNUKJPM.
Today Jim, W5EST, examines the very interesting path to the East from KH6 in this discussion, entitled, “WH2XCR 2015-16 INTO EASTERN NORTH AMERICA & ZF1”:
“Today’s 630m 2015-16 season illustration depicts in brown the spikes of aggregated decodes along Hawaii’s WH2XCR paths east of the Mississippi River and to Cayman Islands’ ZF1EJ.
Eastern receiving stations included WG2XJM, VE3IQB, WH2XRR, WG2XKA, WA3TTS. Eastern transmitting stations who plowed a path to XCR this season included WG2XJM, WH2XXC, WH2XZO, WI2XBV. Thanks to all! Please excuse any omission and let us know.
Like the 6300km to XCR-Japan, the 7400km XCR-XJM and 7800km XCR-ZF1EJ paths both exhibited spiky features. The XCR-ZF1EJ path has contributed significant numbers mainly since the beginning of 2016. Alone, the XCR- E N.Am. spikes would have a fairly level envelope throughout the season. XJM receptions largely constitute those numbers.
Even if XCR-XJM numbers were shown separately, they would lack monthly or fortnightly periodicity. XCR-E N.Am. higher-activity dates have included 11/2,9, 11, 22; 12/2, 1/12,23; 3/1,5,28,30, 4/1,3,4,6,10. Comparison with the dates of moon phases shows no connection.
Why were the XCR-JA decode spikes periodic (half-scale inset, upper left) but the XCR- E N.Am. spikes were not? The XCR-JA and XCR-XJM paths share similar latitudes–Tokyo 36°N., Pittsburgh 40°N. After all, when I started this study I supposed all 630m long paths would be non-periodic!
True, the longer XCR path to eastern North America involves at least one ground surface reflection. Pacific Ocean saltwater reflections ease XCR’s trip to Japan. Possibly, given higher path loss, the storm patterns in North America have been able to complicate the timing of the peaks somehow. But the illustrated XCR- E N.Am. peaks did occur, and the peaks’ timing is non-periodic. Maybe the periodicity in the XCR-JA decode-numbers was just a random anomaly if XCR-JA would perhaps have been non-periodic in other years. (XCR transmitted from Molokai for the first time last fall.)
This question of periodicity, and non-periodicity, remains an unsolved 630m mystery. Can your experience or station records inform the matter? Let us know!”
Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD <at> gmail dot (com)!