A review of my data suggests that this session was very similar to the previous. QRN was high in the early evening here but band openings to the Midwest, East, and Northeast were above average with openings beginning very near full darkness. Noise levels were very high in the early evening due to storms near the Oklahoma – Texas – Arkansas border region but the band was generally quiet this morning. Joe, NU6O / WI2XBQ, indicated that the band was completely quiet in Northern California. As I have also observed in the past, Joe indicates that when the band is open to the East he can hear eastern lightning noise. Larry, W7IUV / WH2XGP, reported generally poor conditions to the East as well.
The geomagnetic field continues at quiet to unsettled levels, varying with some periodicity. Yesterday’s forecast solar storm apparently never manifested or is very late but the Bz has been variable through the session and solar wind velocity is in excess of 600 km/s. DST values have not yet shown the characteristic peak before decreasing that is common with disturbed conditions:
Larry, W7IUV / WH2XGP, reports that he decoded seven WSPR stations and was decoded by seventeen unique stations. Larry did receive transcontinental reports from WG2XKA and WE2XGR/3 but those were received earlier in the evening. Later evening and early morning yielded no further reports on this higher latitude path.
Neil, W0YSE/7 / WG2XSV, reports a session very similar to the previous with a significant amount of daytime activity. He offers these statistics:
“WG2XSV results with “DX” in BOLD
WH2XCR, WG2XIQ, WI2XBQ, WI2XJQ, VE7CNF, VE7SL, WH2XGP
Heard by 10:
NO1D (935 mi), N6RY, VE7BDQ, VE7CNF, VE7IGH, VE7SL, W6XY, WH2XGP, WI2XBQ, WI2XJQ
The PNW had a bit of wspr activity yesterday morning that continued up until around local noon. Levels were good enough for JT65 and maybe even some MFSK8.”
Rick, W7RNB / WI2XJQ, indicates improved conditions and reports that he decoded six WSPR stations and was decoded by eight unique stations:
Phil, VE3CIQ, reports that he decoded WG2XIQ and WG2XKA. He was decoded by SWL/K9, VE2PEP, W8RUT/E, WE2XGR/3, WG2XKA, WI2XFI, and WI2XHK.
Paul-Henrik, OH1LSQ, reports his first MF CW QSO of the season with Dix, DJ6CB. Both operators provided the following comments:
“The conditions (OH-SP and OH-DL) last night appeared pretty good for the time of year. Less static and stronger signals than usual.
BIA-474 and SA-474,5 had a very good SNR here, and DJ6CB was “armchair copy” at best in the peaks. It seemed Dix had more difficulties copying my signals and I guess the static is worse down in DL than here.
A sudden heavy rain here put an end to the QSO, it was so heavy that my antenna insulators became slightly conductive and SWR went from 1.0 to skyhigh in just a matter of seconds.
Anyway, my first MF QSO for the season. Hope there will be more.
“Hello Paul- Hendrik,
I was worked MF with JUMA – 500, quite a while last year and before.
But now, my neighbours cuts the trees and my antenna was shrinked. Then I worked with “Tee” antenna.
I worked DJ6CB too.
I am not QRV anymore
In case You can not contact DJ6CB, let me know, could him contact via telefon 😉
Edgar, EJTSWL, provided the following screen capture of WSPR from VK4YB, as he continues his trek across Australia:
Regional and continental WSPR breakdowns follow:
There were no reports from the trans-Atlantic, trans-African, or trans-Equatorial paths. UA0SNV was present but no reports have been filed at this time.
In the Caribbean, Eden, ZF1EJ, reported my signal:
Laurence, KL7L / WE2XPQ, decoded a consistent number of stations in British Columbia / Pacific Northwest in addition to WH2XCR in Hawaii:
Merv, K9FD/KH6 / WH2XCR, also had a very consistent session. The path to Australia was a little better than the previous including the two-way path to VK4YB:
Jim, W5EST, presents, “PART 6 THEORY JUNGLE SAFARI: WHAT ARE O/X WAVES?”:
“Today, let’s continue where the Aug. 4 blog left off and now view color animations of linear, circular and elliptical polarizations. Go to: http://cddemo.szialab.org/index.html . Advance your understanding of circular and elliptical polarization by clicking on “II. Interaction of Light and Matter.” Then step through the advanced animations by clicking the right-arrow black advance button at very bottom of the screen just left of the A+ button.
These animations involve lossy, phase-shifting substances and do not specifically deal with the E-region and F-region ionosphere. Each ionospheric region is magnetized plasma, meaning it includes electrons freed from atoms as well as geomagnetic field GMF permeating the region. The nighttime ionosphere comprises the E region and F region after early evening D-region goes away. The E or F region is nearly lossless plasma–even though the 630m SNR you receive varies considerably due to variations in free electron concentration (plasma frequency) here and there through region volume.
Your 630m RF wave has an RF electric field where the RF wave arcs and refracts/reflects in the ionosphere. Part of that field Ey lies in the plane of both GMF and the 630m RF ray –it’s near-horizontal for 630m low angle RF and perpendicular to the RF ray (direction of propagation). Ex is electric field in a direction “x” perpendicular to that plane—near-vertical for 630m RF in mid/low latitudes when the RF ray direction makes a significant angle relative to GMF. (The RF wave also has magnetic field H, but electric field direction and ray direction together are sufficient to characterize the RF wave’s orientation.)
For a 630m RF wave in near-lossless magnetized plasma, Appleton-Hartree (AHL) predicts that its O-wave must have just one formula-based polarization ratio EyO/ExO and that EyO and ExO are 90° out of phase. AHL predicts the X-wave must have just one different formula-based polarization ratio EyX/ExX. And EyX and ExX are also 90° out of phase.
AHL has an associated polarization ratio formula stating the only two wave propagations that GMF-permeated plasma will support. The Aug. 1 illustration reproduced here shows paired curves of refractive index-squared (n2). That’s what pairs the associated polarization ratio values for O-wave and X-wave in each case of given plasma frequency, gyrofrequency and ray-GMF angle θ.
For details, see pp. 27, 28, 31 of: http://www.dcjenn.com/EC3630/Ionosphere%28v1.5%29.pdf The imaginary number j , sqrt(-1), there signifies the RF electric field Ex and Ey sine waves are 90° out of phase.
When electric field sine waves having amplitudes Ex and Ey are 90° out of phase, as here, they make an elliptically polarized wave. The 630m RF wave’s electric field moves with varying peak amplitudes ranging between Ex and Ey as the electric field rotates around and around the direction of propagation as its axis. In the special case of elliptical polarization when amplitudes Ex and Ey are equal, it’s called circular polarization. On the other hand, if either Ex or Ey is negligible, the RF wave is linearly polarized in y or x direction respectively.
The paired polarization ratio values pertain to the O-wave and the X-wave respectively. I’ll bet you can now tell the answer to the $64 question: What are those O-waves and X-waves?
Answer: O-waves and X-waves in general are two different elliptically-polarized RF waves. Horrors! Must it really be this bad? Let’s see where this knowledge can take us in a future blog post!”
Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com)!