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Geomagnetic calm before the storm as signals are very strong; QRN levels typical for July; W5EST presents ”WE2XPQ Lateral Skew Pre-SR Enhancement July 13, 2017?”

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for July 15 2016 can be viewed here.

IMPORTANT REMINDER: Neither 630-meters nor 2200-meters are open to amateurs in the US yet.  Please continue to be patient and let the FCC finish their processes.  UPDATED: Click here to view the proposed “considerate operators” frequency usage guide for 630-meters under Part-97 rules that was developed with the input of active band users.

Noise was consistently high in the evening, abating some by morning but generally no worse than recent sessions.  Propagation was improved, however, perhaps due to enhancements from recent solar activity.  Activity was also generally good for a July night with so many wide spread storms.

11-hour North American lightning summary

 

Geomagnetic conditions remain very quiet.  The Bz pointed slightly to the South for much of the day but has since turned around to the North overnight and this morning.  Solar wind velocities remain calm, averaging near 320 km/s.  DST values are at positive levels and remaining quite stable.  The CME associated with recent M-class flaring is expected to arrive sometime tomorrow, resulting in storm levels.

 

 

 

Ken, K5DNL / WG2XXM, reported that he decoded five WSPR stations and was decoded by 34 unique stations including E51WL, WH2XCR, and six Canadian stations.  Ken also noted two-way reports with ZF1EJ and seventeen reports from E51WL, best at -19 dB S/N.

Neil, W0YSE/7 / WG2XSV, reported that he was decoded by seventeen unique stations until 0700z when the WSPR4 software froze.  Neil’s best DX was N6RY in DM13id at  a distance of 1465 km.  Neil added that his “JT9 and FT8 were easy copy by Dick, WD2XSH/26, last night in the 05z-06z time slot.”

Mike, WA3TTS,  reported “Seven wspr2 stations decoded overnight on 630m, best DX WH2XGP at 0940 -17 SNR out of a dozen or so XGP overnight decodes on NW EWE antenna, Also decoded XIQ XXM XSH.15 VE3CIQ XNG and XJM. On 2200m band wspre2 15 decodes from WH2XXP, best -24 at 0952 and 66 decodes from WH2XND best -17 at 1020 UTC.”

Trans-Pacific report details, excluding E51, KL7, and KH6, can be viewed here.

Larry, W7IUV / WH2XGP, provided reports for eight WSPR stations and he received reports from 29 unique stations including ZL1RS.  As W7IUV, Larry provided reports for eight unique stations.

WH2XGP 24-hour WSPR activity (courtesy NI7J)

 

Band conditions seemed quite strong, even very early in the evening, which I attribute to the recent solar activity.  It was a noisy night, which led me to start out with and remain on WSPR overnight but noise moderated a bit by morning and strong signals made listening much easier than recent sessions.  Storm chances return to North Texas for the next five days so my activity will probably be a last minute decision.  My WSPR transmission report details can be viewed here and my WSPR reception report details can be viewed here.

WG2XIQ 24-hour WSPR activity

 

Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR activity

 

European 24-hour WSPR activity

 

Japanese 24-hour WSPR activity

 

Oceania 24-hour WSPR activity

 

Eden, ZF1EJ, provided reports for two WSPR stations and he received reports from three unique stations.

ZF1EJ 24-hour WSPR activity

 

Warwick, E51WL, provided reports for six WSPR stations.  Report details can be viewed here.

E51WL 24-hour WSPR activity

 

Laurence, KL7L / WE2XPQ, provided reports for two WSPR stations and he received reports from twelve unique stations.  He shared two-way reports with WH2XCR.

WE2XPQ 24-hour WSPR activity

 

Merv, K9FD/KH6 / WH2XCR, provided reports for VK3HP and VK5FQ.  He shared two-way reports with WE2XPQ and VK4YB.  He received reports from E51WL, VK2XGJ, ZL1RS, ZL2AFP, and ZL2BCG.  Merv’s DX report details can be viewed here.

WH2XCR 24-hour WSPR activity

 

Jim, W5EST, presents “WE2XPQ Lateral Skew Pre-SR Enhancement July 13, 2017?“:

“In this blog during much of April, the posts discussed sunrise SR enhancements. Some of them involve paths nearly aligned with SR heading–perpendicular to the terminator. Probably many such enhancements involve vertical skew along the eastward end of whatever great circle path connects two 630m stations.

One of the blog days, I hoped someday for evidence of a lateral skew 630m SR enhancement. When a path would be terminator-aligned, would such an enhancement occur?  http://njdtechnologies.net/040617/    Mixtures of vertical and lateral skew were also recognized.

Now it’s July. These days, civil and nautical twilight at Anchorage AK accompany the sun on its merry-go-round. Anchorage July 13 sunset commenced with civil twilight 38° west of North.  The below-horizon sun wheeled from there into nautical twilight and maintained nautical twilight through straight north solar midnight at 1005z. Take note: that’s the time when the enhancements were starting to happen.  From straight north there, nautical twilight continued on to wee hours civil twilight 1111z until XPQ sunrise SR at 37° east of North 1248z.

I’ve drawn on the WSPR web site’s map illustration for July 13 to add various approximately timed positions of the curved terminator (faint dashed curved lines) arching down into Pacific NW, much of western Canada, and USA lower-48. Remarkably, all the SNR peaks in the XPQ-paths’ SNR sequences not only occurred within about a half hour of each other but also when the terminator was over far northern Alaska and over Manitoba and the USA Southeast.

I dubbed a red circle onto a geographic area that might have provided lateral skew from its E-region overhead. Imagine the E-region as a downwardly billowing bedsheet illuminated by the sun’s ionizing radiation high over the still-darkened land. Lateral skew could augment otherwise ordinary deep nighttime great circle 1-Ehop and 2-Ehop propagation.  The sun’s ionizing rays at E-region altitude would extend far beyond the terminator, southward in Alaska, SW in Canada and SW/WSW in the western USA.

Was the WG2XXM 630m signal indeed given a boost on its second hop by a lateral reflection E-region process located somewhere around the border of British Columbia with the Yukon Territory? Southern Yukon would be about 1000 km from Anchorage–close enough to Anchorage to lie at half-hop reflection distance and possibly close enough to the oncoming terminator 700km NE to support a lateral reflection.  Were the TX and RX stations in the far western USA and in BC likewise given a boost a few minutes later by such a lateral reflection E-region process located in northwestern BC or southwestern corner of Yukon Territory? (Trial and error led to this position. I used a distance calculator site. https://www.daftlogic.com/projects-google-maps-distance-calculator.htm )

Deep nighttime is quite capable of supporting 630m SNR peaks such as one that occurred on the XPQ-xcr path from Alaska to Hawaii at about the same time.  So, it’s possible that lateral skew had nothing to do with these mid-July SNR excursions. It’s the similar times of all the SNR peaks that nudges me to consider lateral skew nevertheless.

Investigating all the possibilities takes a first step toward a deeper understanding of this 630m mystery band. Tell us your insights from experience. Thanks to all the station operators involved! TU & GL.”


Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com)!