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First trans-Atlantic reports of the season: WE2XGR -> F59706; Trans-Pacific openings collapse as Pacific region receives the brunt of yesterday’s M-class flares; CME and subsequent geomagnetic storm expected in coming days; W5EST presents: ”LF/MF/HF Ionosphere Under Solar Eclipse: Funded Scientists Speak Up”

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for September 5, 2016 can be viewed here.

IMPORTANT REMINDER: Neither 630-meters nor 2200-meters are open to amateurs in the US yet. That includes stations using fake or pirated call signs. 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.

A strong cold front is moving Southeast and with it strong lightning-bearing storms.  I admit that I did not notice overwhelming noise during the evening and this morning the noise floor is high but its not obnoxious like we have observed recently.  I suspect  this is a function of very poor propagation.  The Caribbean and Atlantic regions are also experiencing a lot of storm activity and the likelihood of another strong hurricane possibly hitting Florida  and other parts of the East coast could mean high noise for many parts of North American in the coming days.

11-hour North American lightning summary

 

Geomagnetic and solar conditions are a mess.  Several strong flares were observed during the day on Monday, including a Type-II radio emission that has sent a burst from coronal hole towards earth.  The effects should be felt in the coming days.  Protons were elevated, resulting in an S1 radiation storm and G1 storm levels were observed through the evening period.   The Bz is pointing slightly to the South this morning and solar wind velocities are averaging near 530 km/s.  DST values have shown a few significant decreases but has generally remained stable at negative values.  Once the effects of the coronal hole arrive, expect significant, prolonged decreases.  NOAA reports that the current solar conditions have thus far primarily impacted the Pacific regions with polar regions also experiencing very high absorption due to elevated proton levels.  I am sure conditions will become dicey for most of us once the CME arrives.  We will have to wait and see what, if any,  enhancements present themselves!

 

 

 

A number of stations were off air for this session, either due to anticipated poor band conditions or poor weather conditions in the Northeast to the Midwest.  I expect weather will play a part in a number of absent stations in the coming days.

Trans-Atlantic report details can be viewed here.

John, W1TAG / WE2XGR, provided reports for five WSPR stations and he received reports from fifteen unique stations including Patrick, F59706, in France.  These four reports of John by Patrick represent the first trans-Atlantic reports of the season.  Patrick included these comments:

“…First TA spot of my new season, one hour before my sunrise (05:15z)and at the same time receiving a lot of NA stations on 160m wspr (W8AC, KC4SIT, K9PAW, K9YWO, KD9XB, WA9WYK).  Have to say that is unusual for me. Previous seasons i was hearing mosly 630m NA station in Intra-night and rarely around EU SR.  Hope same satisfaction to all EU stations…”

Doug, K4LY / WH2XZO, reported that “Increased QRN and absorption led a slow night” in South Carolina.  Doug provided reports for eight WSPR stations and he was reported by 26 unique stations.

Rick, W7RNB / WI2XJQ, provided reports for six WSPR stations and he received reports from 22 unique stations.  Unique report details can be viewed here.

Al, K2BLA / WI2XBV, indicated moderate to low noise in Florida this morning.  He provided reports for five WSPR stations and my calls on CW at RST 579.

Mike, WA3TTS, reported that he decoded three WSPR stations before 0400z when he QRT’ed for the night due to strong nearby storms that increased noise levels to S9 plus 50 dB.

Trans-Pacific report details can be viewed here.

Roger, VK4YB, reported that this session was one to forget.  He heard one stations (WH2XXP) and was heard by only one stations (W6SFH).  He added that he “…Fell asleep at the operating position and woke up to find the TX off. Made little difference!”

Joe, NU6O / WI2XBQ, provided reports for four WSPR stations and he received reports from 24 unique stations including one report from ZL2AFP at -30 dB S/N.  Joe added that he had  “Only 3 others greater than 1000 Km. 7 spots with single digits out to 500 Km.”

Ward, K7PO / WH2XXP, received reports from 52 unique stations including ZL2AFP, VK4YB, VK2XGJ and VK4SC.

I operated CW from 0008z to 0130z on 474.5 kHz, which was through sunset here in North Texas.  The band was not really very noisy but the impacts of solar activity were unfolding and I was located on the edge of what was reported as a highly ionized D-layer so noise may not have been propagating well.  As darkness set in and the D-layer disappeared, I did not observe much additional noise other than the typical evening elevated noise floor.  At 0130z I transitioned to WSPR for just a bit but the band was very different and clearly impacted by the ongoing space weather compared to the previous session.  It was tough to get reports from the North with East / West reports less impacted.  I QRT’ed for the night at 0242z.  My WSPR transmission report details can be viewed here and my WSPR reception report details can be viewed here.  This morning I called CQ again on 474.5 kHz CW again and could hear a station deep in the noise with lots of QSB calling but I never identified who it might have been.  It could have been my ears playing tricks on me.  Al, K2BLA / WI2XBV, reported my calls this morning at RST 579.  I continued to call until sunrise.

WG2XIQ 1-hour WSPR activity

 

Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR activity

 

European 24-hour WSPR activity

 

African 24-hour WSPR activity

 

Asiatic Russian 24-hour WSPR activity

 

Chinese 24-hour WSPR activity

 

Japanese 24-hour WSPR activity

 

Oceania 24-hour WSPR activity

 

Pacific 24-hour WSPR activity

 

Eden, ZF1EJ, provided reports for five WSPR stations. He received reports from eighteen unique stations including VE4XC, VE7SL and VE6JY.

ZF1EJ 24-hour WSPR activity

 

Laurence, KL7L / WE2XPQ, reported that he was listening during this session but due to the very high absorption at his latitude, no decodes were reported.

Merv, K9FD/KH6 / WH2XCR, was QRT for this session.

Jim, W5EST, presents, “LF/MF/HF Ionosphere Under Solar Eclipse:  Funded Scientists Speak Up”:

“For pictures of total eclipses visually, go to: https://www2.hao.ucar.edu/solar-eclipses (scroll 2/3, see Figures 5-8).

The actual shadow of the recent Aug. 21, 2017, solar eclipse on North America is revealed in motion imagery from a million miles in space: https://www.nasa.gov/image-feature/goddard/2017/nasas-epic-view-of-2017-eclipse-across-america (At top: wait a few seconds for global motion picture to begin.)

Scientific teams, one of them partnering with radio amateurs, studied the Aug. 21 solar eclipse effects on our ionosphere.  I’ve excerpted ionospheric solar eclipse projects below.* Click on the links to see scientists presenting their projects in advance of Aug. 21!

 

Empirically-Guided Solar Eclipse Modeling of the Earth’s Ionosphere

[ https://www2.hao.ucar.edu/eclipse-science-showcase-%E2%80%93-friday-july-21-boulder-colorado  (scroll halfway, click on presentation #4 video, start at minute 2:00)]

… Greg Earle and his team at Virginia Tech in Blacksburg…how the ionosphere responds to changes in sunlight. …Bend, Oregon, Holton, Kansas, and at the Shaw Air Force Base in Sumter, South Carolina, using custom designed ionosodes, instruments that use radio waves to look up into the ionosphere and measure its height and density. Their measurements will be combined with data from a nation-wide network of GPS receivers and signals from the Ham Radio Reverse Beacon Network…data from Virginia Tech’s SuperDARN radars, two…placed along the eclipse path in Christmas Valley, Oregon, and Hays, Kansas.

 

Solar Eclipse-Induced Changes in the Ionosphere Over the Continental US

[ https://www2.hao.ucar.edu/eclipse-science-showcase-%E2%80%93-friday-july-21-boulder-colorado  (scroll halfway, click on presentation #5 video)]

….atmospheric gravity waves…triggered by eclipses. A team, led by Phil Erickson of MIT’s Haystack Observatory in Westford, MA…extended network of sensors to monitor the ionosphere …large-scale effects of these disturbances… 6,000 ground-based sensors…data from NASA’s space-based Thermosphere Ionosphere Mesosphere Energetics and Dynamics, or TIMED, mission…monitor the changes in the ionosphere in real-time.

 

Quantifying the Contributions of Ionization Sources on the Ionosphere

VLF transmissions…project, led by Bob Marshall at U. of Colorado Boulder, will use…eclipse to study the ionosphere…improving models of the region’s dynamics. Radio wave transmissions sent from Lamoure, North Dakota,…receiving stations across the eclipse path in Colorado and Utah. The data will be compared with…NOAA’s Geostationary Operational Environmental Satellite [GOES], NASA’s Solar Dynamics Observatory [SDO] and NASA’s Ramaty High Energy Solar Spectroscopic Imager [RHESSI], to precisely characterize the effect of the sun’s radiation on the ionosphere.

In a further D-region VLF project, Morris Cohen presented for a Georgia Tech team. https://www2.hao.ucar.edu/eclipse-science-showcase-%E2%80%93-friday-july-21-boulder-colorado  (scroll halfway, click on presentation #3 video)]

TU & GL on 630m!”

*Excerpts from: https://eclipse2017.nasa.gov/science-ground

 


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