The details for October 11, 2016 can be viewed here.
The UTC amateur registration database is here. Even if you don’t think you will use these bands, REGISTER! Doing so prevents UTC from future PLC coordination in these bands near your QTH. While amateur interference to PLC systems is a myth and PLC systems are migrating away from RF, there is no reason to give them a reason to do something weird in the future.
HERE are a few mode specific comments addressing where modes are located now and probably where they are best placed in the future.
Evening storms were mostly localized to the Midwest and Southeast and they were a bit rowdy, creating quite a bit of listening displeasure back here in North Texas. Those storms dissipated overnight only to be replaced by a series of storms in Virginia. Its noisy this morning as well, perhaps worse than last night with almost constant lightning crashes and the source may be located in Mexico and the Gulf of Mexico. VK4YB reports strong storms persisting in Oceania that are expected to continue through mid-month. It’s Spring downunder and with that come Spring storms.
Geomagnetic conditions reached G1 storm levels this morning due to a geoeffective coronal hole according to Solarham. The Bz is pointing firmly to the South and proton levels are elevated to the moderate category (a peak of 171 p/cc was observed during on reporting period) but solar wind velocities are only averaging near 400 km/s at this time. A few reports later in the morning approached 800 km/s. The value is expected to increase significantly as the morning progresses. DST values have decreased significantly in the last few hours.
Joe, VO1NA, received a very nice report of his QRSS10 signal on 477.7 kHz from Stefan, DK7FC, who indicated on the RSGB-LF reflector that he was reporting from his remote receiver site using am East / West loop located in a tree.
Roelof, PA0RDT, also decoded Joe and posted these comments and screen capture on the RSGB-LF reflector:
“The Kyoto Dst dropped overnight and propagation went down the drain. Still excellent aural copy your signal.
On an other note, MF propagation from Japan to Europe has been good the last week. A Finnish listener reported NAVTEX reception from the far east, received on a long beverage antenna.
However, NAVTEX Japan from Naha was also received in Italy and yours truly logged it last evening. The last time I heard it was in September 2009. So there might be an opportunity for WSPR or FT8!”
Reverse Beacon network reports for the session follow (Note that VE7VV indicates that RBN S/N reports are about 10 dB higher than WSPR reports):
Mal, G3KEV, reported on the RSGB-LF reflector that he was active during the evening on 474 kHz with FT8. He seems to have completed a QSO with DL3ZID. He was heard by G0FCU but did not reciprocate a call to complete a QSO.
Roger, G3XBM, also reported on the RSGB-LF reflector that he was QRV briefly on FT8, receiving a report from Ian, G4GIR, who indicated that “@1823 1522 Hz -18dB called you but guess you didn’t hear me? I was running 5W from the TX.” Roger received WSPR reports from Norway using only a 2-meter diameter “big wheel” loop and power mains ground. He indicates his EIRP is very low.
Trans-Atlantic report details can be viewed here.
Dave, AA1A / WD2XSH/17, received reports from 38 unique stations including EI8JK, F1AFJ, F59706, G0MJI, G8HUH, LA2XPA, PA0EHG, PA0RDT and PA7EY.
Doug, K4LY / WH2XZO, reported that he “…ran CW on 474.24 last night. Ten spots by RBN station WZ7I in PA, and about 32 by AA4VV in NC. Surprisingly, despite CW TX interruptions 45% of time,10 unique WSPR decodes. ” Doug added in an email that this was the “First time I’ve looked at the RBN spots on 630M and plan to compare my two 80M antennas with the RBN tonight.. “
Phil, VE3CIQ, reported that he decoded nine WSPR stations and he was decoded by 22 unique stations. His best DX for the session was two-way reports shared with WH2XGP at a distance of 3300 km.
Neil, W0YSE/7 / WG2XSV, had to shut down a bit early due to storms, transitioning to receive-only with an E-probe that was relatively safe. He provided reports for nine WSPR stations including VE7BDQ, WE2XPQ, WG2XXM, WH2XCR, WH2XGP, WH2XXP, WI2XBQ, WI2XJQ and WJ2XBZ. He received reports from twenty unique stations with best DX from stations in Hawaii, Alaska and Michigan. Neil also experienced success with the Reverse Beacon Network and submitted these comments:
John, WA3ETD / WG2XKA, indicates that he provided reports for ten WSPR stations and he received reports from 34 unique stations. John indicates that band conditions were down but the transcontinental path to the Pacific Northwest was open.
Ken, K5DNL / WG2XXM, reported that he decoded eleven WSPR stations and he received reports from 49 unique stations including ZF1EJ and five Canadian stations. Ken shared two-way reports with WH2XCR.
Rick, W7RNB / WI2XJQ, provided reports for ten WSPR stations and he received reports from 22 unique stations. Rick’s unique report details can be viewed here.
Ernie, KC4SIT / WI2XQU, provided reports for four WSPR stations and he received reports from 36 unique stations.
Al, K2BLA / WI2XBV, indicates a noisy morning in Florida. He provided reports for nine WSPR stations and he received reports from 28 unique stations. He shared two-way reports with WH2XCR. He also received WH2XZO CW on 474.2 kHz at RST 539. He decoded my CQ’s on 474.55 kHz at RST 559.
Dave, N4DB, reported that he decoded eleven WSPR stations this morning including WH2XZO at RST 449 through QSB and QRN. Dave also indicated that he was seeing my CW in his waterfall.
Mike, WA3TTS, reported that he decoded fourteen WSPR stations overnight, including “…XCR, BDQ. XGP. XXP over 3000km.” Mike added that he was listening with the
“…NE EWE early then NW EWE late until past SR.
WH2XCR 5 spots, best -21 @ 1118
VE7BDQ 1 spot -25 @ 0740
WH2XGP 44 spots, best -9 @ 0808
WH2XXP 60 spots, best -8 @ 1118
Also 55 spots of WH2XND on 2200m overnight, best -24 @ 0812. NW EWE after SS, the e-probe late until after SR Pair of ground rods added to e-probe coax about 25 feet before the mast for the e-probe near french drain outlet location. Ground rods are in addition to 2×2 ft aluminum grounding plate at the base of the e-probe mast…
At SS and B4 dark heard LW BCs Euro 1 Q4 on 183 kHz, BBC R4 198 kHz Q3~4, Chaine 3 Algeria Q5 S9 252 kHz on e-probe.”
Trans-Pacific report details, excluding KL7 and KH6, can be viewed here.
Roger, VK4YB, indicates that “The storms are located mostly in Queensland and are forecast to persist well past Oct 16 unfortunately. My best DX tonight was KU4XR. Heard 5, heard by 28.” Roger received reports from JA1NQI, JA1PKG, JA3TVF, JE1JDL, KU4XR, VE6JY, VE6XH VE7BDQ, W7IUV and WE2XPQ. He shared two-way reports with WH2XCR, WI2XBQ and WH2XGP.
Joe, NU6O / WI2XBQ, indicates that at his station “Conditions a little better than yesterday. Numbers still way down from the peak, heard by 19 vs. 45. Paths to JA and VK still active.” Joe provided reports for ten WSPR stations and he received reports from nineteen unique stations including ZL2AFP and JA1NQI. Joe shared two-way reports with VK4YB.
Ward, K7PO / WH2XXP, received reports from 51 unique stations including ZL2BCG.
Larry, W7IUV / WH2XGP, indicates that “Last night condx abt same as nite before, OK but nothing spectacular, usual suspects in log…Cannot no matter how hard I try get copied by the RBN guys, think they just don’t copy the ‘WH2’.” He provided reports for sixteen WSPR stations and he received reports from fifty unique stations including ZL2BCG and JA1NQI. He shared two-way reports with VK4YB. As W7IUV, Larry provided reports for eleven WSPR stations, including VK4YB.
Evening band conditions were noisy but propagation seemed OK. I called CQ through most of the twilight period on 474.5 kHz CW but opted to QRT about 0100z. Glen, K5FX, about 200 miles to my South, reported that I was RST 539 at 0048z, just prior to my QRT. I returned to air around 1010z, calling CQ on 474.55 kHz, up a bit from where I normally operate as WH2XZO was beaconing on 474.2 kHz CW looking for reverse beacon reports, which were numerous from East coast CW skimmers. The period of the QSB was about 8-9 minutes and Doug’s signal peaked here nicely several times, even being detectable after his sunrise. I called him several times on his frequency in case he was sitting there but he indicated later this morning that he was not. With high noise and elevated Kp I struggled today to make it to any of those skimmers. Dave, N4DB, located in Virginia reported my calls in his waterfall this morning before sunrise. Its good to see the activity and may give a bit of insight into what we may expect next week.
Regional and continental WSPR breakdowns follow:
Eden, ZF1EJ, provided reports for six WSPR stations including WH2XCR. Eden continues in a receive-only capacity as antenna repairs continue at his station.
Laurence, KL7L / WE2XPQ, provided reports for six WSPR stations including VK4YB and he received reports from eleven unique stations. He shared two-way reports with WH2XCR, WG2XSV, WI2XBQ, and WI2XJQ. DX report details can be viewed here.
Kevin, KL7KY, provided reports for WH2XCR, WE2XPQ and WH2XGP.
Merv, K9FD/KH6 / WH2XCR, provided reports for thirteen WSPR stations including VK3HP and ZL2AFP. He shared two-way reports with VK4YB and WE2XPQ. Merv received reports from thirty unique stations including JA1NQI, JA1PKG, JE1JDL, JH3XCU, JR1IZM, KL7KY, VK2XGJ, ZF1EJ, ZL1EE, ZL4EI and ZL2BCG. DX report details can be viewed here.
Jim, W5EST, presents “PUTTING IN THE NUMBERS: W/VE-KH6-VK/ZL PEAK SNRs, 9/1 – 10/6/2017″:
“Many 630m stations composed trios for TP paths. In today’s illustration, the left-hand graph of Peak SNR vs. Distance shows a distinct trend downward -10 dB over a range of N.Am.-VK/ZL distances SW 10,500 km to 14,500 km. At any one TP distance though, SNRs are spread very wide: a 20 dB range straddles the downward SNR trend line.
In the center graph, each whole TP path distance is segmented. Loss Difference Ratio is plotted vs. ratio of distances the path portions occupy. (Endnote*) In relation to the graph points, a stairstep concept (dashed red) fits the points somewhat better than their upward-slanting trend line (black). Loss Difference Ratio ramps up and roughly doubles from 1.2 to 2.4 for the KH6-VK/ZL path compared to N.America-KH6. Its steep ramp is centered on a critical Distance Ratio value 2.0.
Remarks: The path loss in the KH6-VK/ZL path portion of N.Am.-VK/ZL propagation seems remarkably low—even though it’s propagation 7000-9000 km. The 7000-9000 km path portion is loss-equivalent to 2-hop multihop in the half-as-lengthy N.America-KH6 path portion.
Is the analysis method giving useful information? Assuming so, another blog post can go into possible explanations. 630m stations composed each of thirty-seven 37 TP trios by which today’s data points were derived. Each trio connects N.America-Hawaii-VK/ZL on a SW path. Peak SNRs were ascertained out of 36 days Sept. 1 – Oct. 6, 2017. Those 36 days nicely stretch across equinox and more nearly equalize the exposure of N/S Hemisphere 630m TP path portions to space weather.
The right-hand graph plots each dB amount by which KH6-to-VK/ZL path loss exceeds N.America-to-KH6 path loss. That Path Difference in dB is plotted versus Distance Ratio of the path portions. KH6-to-VK/ZL path loss is remarkably similar to N.America-to-KH6 path loss until Distance Ratio 2.0 is reached. Then KH6-to-VK/ZL path loss in the N.America-VK/ZL path jumps about 15 dB compared to N.America-to-KH6 path loss. Even the trend line by itself suggests a very substantial 15 dB rise in comparative path loss as Distance Ratio increases between 1.2 and 2.4.
Both a stairstep fit (red) and trend line fit (black) suggest something strongly affects path loss in 630m TP propagation directed SW. Critical Distance Ratio 2.0 is particularly intriguing. Whatever propagation modality is providing low equatorial path loss probably gives way to a mixture of prop modes near distance ratio 2.0. At distance ratios over 2.0, a 15 dB lossier propagation mode predominates.
This trans-Pacific 630m propagation study could not happen without persistent station operations by the many stations in the 630m community. Thanks in this case go to all 630m stations in New Zealand and VK stations within one hop of the east coast of Australia and W/VE stations within one hop of the west coast of N. America. For the SW TP path, this station list includes stations found in at least one TP trio:
N. America: VE7BDQ, WD2XSH/20, WG2XXM, WH2XXP, WI2XBQ
Australia: VK2COW, VK2EIK, VK2XGJ, VK3ALZ, VK3GJZ, VK3NFI, VK3WRE, VK4YB, VK5ABN, VK5AKK, VK7TW, EJTSWL
New Zealand: ZL1EE, ZL2AFP, ZL2BCG, ZL4EI
Stations who operated, but were not includable in a SW-directed TP trio as things turned out, did significantly contribute to this effort. All operations are deeply appreciated because who can know in advance which TP paths would complete for which stations. This post does not reach conclusions about the Northeast TP direction for which some TP trios also formed that include some of these and still other stations. TU & GL on 630m!
ENDNOTE: I computed and graphed the Loss Difference Ratio formula as blogged 9/29/17 and written out above the center graph. Not shown are more refined calculations with distance dB correction included according to the 10/7/17 blog. I’ve omitted them here since today’s graphs portray the data at least as well. FYI, today’s right-hand graph plots numerator less the denominator of the center graph’s formula.
Other relationships I tried either produced a jumble of scatterplot points or no more information than apparent in today’s left-hand graph. They were: Peak SNR13 vs. Distance12/23 ratio; TX power adjusted SNR13 vs. Distance12/23 ratio; TX power-adjusted and distance-adjusted SNR13 vs. Distance12/23 ratio; Unadjusted (SNR13-SNR12) vs. Distance12/23 ratio.”
Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com)!