Radio: it's not just a hobby, it's a way of life

Current Operating Frequency and Mode

OFF AIR; QRT Thursday night but back Friday morning by 1100z

Improved geomagnetic conditions result in better band conditions but southern storm QRN makes listening difficult; WG2XXM –> VK4YB, VK2DDI; WH2XGP –> VK2XGJ; New station ‘JF1LKS’ receives WH2XCR and VK3ELV

– Posted in: 630 Meter Daily Reports, 630 Meters

Another slow start turned into a pretty good night of WSPR reports after 0500z.  Storms peppered the southern and southwestern US and made listening a challenge during the early evening.  Precipitation noise from an on-going snow storm was reported in the Midwest.  Even with these challenges the band was open and allowing reports, many of which were two-way communication quality.

Geomagnetic conditions have returned to quiet levels, with a North-pointing Bz and solar wind velocities in the low category.

planetary-k-index 040916


Kyoto DST 040916


Australia 040916


Ken, K5DNL / WG2XXM, reports that he decoded eight WSPR stations and was decoded by 34 unique stations including VK2DDI and VK4YB.

WG2XXM VK4YB 040916

WG2XXM, as reported by VK4YB


WG2XXM VK2DDI 040916

WG2XXM, as reported by VK2DDI


Phil, VE3CIQ, reports that he decoded WH2XGP on the transcontinental path at his sunrise in VE3.

VE3CIQ 040916

VE3CIQ session WSPR activity


Neil, W0YSE/7 / WG2XSV, reports that he decoded five WSPR stations and was decoded by ten unique stations with 45 reports for WH2XCR, best at -12 dB S/N.

Doug, K4LY / WH2XZO, performed some antenna work yesterday and reports the following from the day and overnight session:

WH2XZO 040916a

Larry, W7IUV / WH2XGP, reports that he decoded six WSPR stations and was decoded by thirty unique stations including VK2XGJ.

WH2XGP VK2XGJ 040916

WH2XGP, as reported by VK2XGJ


Ken, SWL/EN61, in Indiana, sent this link about noise suppression.

Mike, WA3TTS, observed variations in his reporting times of WH2XCR compared to WG2XJM.  This propagation behavior has always fascinated me.  Mike includes his statistics and comments below:

WA3TTS 040916


New or newer WSPR stations observed receiving include WB3FTQ and KC3BKT.  Welcome aboard!

Regional and continental WSPR breakdowns follow:

NA 040916

North American 24-hour WSPR activity


EU 040916

European 24-hour WSPR activity


JA 040916

Japanese 24-hour WSPR activity


VK 040916

Australian 24-hour WSPR activity


There were no trans-Atlantic or trans-African reports during this session.  UA0SNV was present from Asiatic Russia but no reports were found in the WSPRnet database.

Eden, ZF1EJ, reported a number of stations around North America in addition to WH2XCR in Hawaii.

ZF1EJ 040916

ZF1EJ 24-hour WSPR activity


WH2XCR ZF1EJ 040916

WH2XCR, as reported by ZF1EJ


In Alaska,  Laurence, KL7L / WE2XPQ, continues to make a valiant effort in spite of the charged-up electron reservoirs from the recent solar wind event.

WE2XPQ 040916

WE2XPQ 24-hour WSPR activity


WE2XPQ WH2XCR 040916

WE2XPQ, as reported by WH2XCR


In Hawaii, Merv, K9FD/KH6 / WH2XCR,  experienced a great session with numerous reports from Japan and Australia, including reports from new WSPR station ‘JF1LKS’.  Merv notes that VK3ELV and VK4YB were present right up to 1500z but upload problems prevented those reports from being seen in the WSPRnet database.

WH2XCR JF1LKS 040916

WH2XCR, as reported by JF1LKS


WH2XCR JH3XCU 040916

WH2XCR, as reported by JH3XCU


WH2XCR VK2DDI 040916

WH2XCR, as reported by VK2DDI


WH2XCR VK2XGJ 040916

WH2XCR, as reported by VK2XGJ


WH2XCR JA1NQI-1 040916

WH2XCR, as reported by JA1NQI-1


WH2XCR VK4YB 040916

WH2XCR, as reported by VK4YB


WH2XCR WE2XPQ 040916

WH2XCR, as reported by WE2XPQ


In Australia, Phil, VK3ELV, and Roger, VK4YB, both were reported by WH2XCR.  Phil received additional reports from Japan during the session, including new WSPR station ‘JF1LKS’.

VK4YB WH2XCR 040916

VK4YB, as reported by WH2XCR


VK3ELV WH2XCR 040916

VK3ELV, as reported by WH2XCR


VK3ELV JH3XCU 040916

VK3ELV, as reported by JH3XCU


VK3ELV JF1LKS 040916

VK3ELV, as reported by JF1LKS


vk3elv tnukjpm 040916

VK3ELV, as reported by TNUKJPM


Jim, W5EST, presents part 3 in his series entitled,”SLIDING WINDOW APPROACH TO 2015-2016 TA SEASON”:

“Today’s graphical inset “630m TP” portrays 630m nightly numbers of spots for the 2015-2016 WSPR season both ways between North America and Australia. Transmitting and receiving stations have demonstrated that 630m spans these two continents in late summer and early fall, and even in late winter and early spring this year!

As you will recall from this blog April 6 and 8, such long path seasonality is reflected in

activity-oriented reception counts. Every decode of the same TX regardless of TxPct–even if obtained at different RX stations in the same timeslot–accumulates a night’s count.

I’ve overlaid the 630m TP graph in the upper middle of the 630m TA graph from yesterday.  Dates are aligned and scales of the axes are matched. You can compare and contrast TA and TP with your own eyes.

630m TP differs from 630m TA in several ways: TP has two mini-seasons. TP has more than twice the path length of TA.  Seasonal peaks in TP spot numbers do not correlate timewise with 630m peaks in TA spot numbers.   Geographically, TP is trans-equatorial across the Pacific Ocean while TA transits the North Atlantic at high latitudes.

Nevertheless, 630m TP and 630m TA have some similarities.  Both their seasons can start as early as August and end sometime in N. American spring. (Last fall in 2015, TA just had an unusually late start. On 8/17/2014 WG2XKA did TA into GM4SLV, for instance.)

Both TA and TP have their good nights, but their seasons feature significant dry spells in between.  The dry spells partly result from the WSPR decoder’s threshold, partly from storms, and partly from impaired propagation.

Appended see a Date Table of Lunar Phases.  You can see that this season’s TA peaks align well with the moon’s third quarter for several months, but 2016’s January and early March peaks don’t fit the pattern. A lunar explanation is not particularly compelling.  If the third quarter is a tidal minimum and quiets the ionosphere, why wouldn’t the first quarter be equally fertile for TA?

I doubt that the sun’s rotational period would fit the TA peaks any better than some lunar phase does.  However sunspots, particle emissions and coronal dynamics modulate the space weather in Earth’s vicinity that affects the ionosphere and generates aurora. So the sun’s rotational period is not the whole story.  Tell us your words of wisdom!

Other 630m long paths have generated many decodes in the last several months–VK-JA, HI/Alaska-JA, EU-FR5 (Reunion Island), and HI-to-E.USA.  Time permitting, I hope to generate their seasonal illustrations for future blog posts.

Satisfactory prediction of 630m long path success escapes us for now.  It’s as fun to enjoy the mystery of the occasional successes just as much as it is tantalizing when opportunities fail to materialize even on storm free nights of quiet space weather and GMF conditions!”

W5EST 040916a


Lunar synodic period 29.530589 days https://en.wikipedia.org/wiki/Moon

Solar Carrington period 27.2753 days https://en.wikipedia.org/wiki/Solar_rotation


W5EST 040916b


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