NJDTechnologies

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

Current Operating Frequency and Mode

CQ 474.5 kHz CW and alternately tuning 472 kHz - 475 kHz for signals.

Storm noise continues in the south eastern US; DK7FC –> WE2XGR/3; WE2XPQ QRV again; Strong Pacific activity

– Posted in: 630 Meter Daily Reports, 630 Meters

Noise continues in the south and south eastern portion of the US, impacting stations into New England.  The impact was less pronounced in the Pacific Northwest were Larry, W7IUV / WH2XGP, reported eight stations and noted that the path to WE2XPQ in Alaska was improved.

planetary-k-index 022416

 

Kyoto DST 022416

 

Australia 022416

 

John, WA3ETD / WG2XKA, submitted the following session report from Vermont:

WG2XKA email 022416

WG2XKA 022416

WG2XKA WSPR session activity

 

Regional and continental WSPR breakdowns follow:

NA 022416

North American 24-hour WSPR activity

 

EU 022416

European 24-hour WSPR activity

 

VK 022416

Australian 24-hour WSPR activity

 

JA 022416

Japanese 24-hour WSPR activity

 

There were no reports from the trans-African path.  UA0SNV was present from Asiatic Russia but had no reports in the WSPRnet database.

A single trans-Atlantic decode of DK7FC was provided by WE2XGR/3.

DK7FC WE2XGR3 022416

DK7FC, as reported by WE2XGR/3

 

Eden, ZF1EJ, and Roger, ZF1RC, had storms between their location and the bulk of stations on the air in North America.

ZF1EJ 022416

ZF1EJ 24-hour WSPR activity

 

ZF1RC 022416

ZF1RC 24-hour WSPR activity

 

In Alaska, Laurence, KL7L / WE2XPQ, was transmitting again, being reported down the West coast of North America and Hawaii.  KL7L was active as receive-only once again.

WE2XPQ 022416

WE2XPQ 24-hour WSPR activity

 

KL7L 022416

KL7L 24-hour WSPR activity

 

WE2XPQ WH2XCR 022416

WE2XPQ, as reported by WH2XCR

 

In the Pacific, Merv, K9FD/KH6 / WH2XCR, received reports from  Alaska, Japan and Australia, including two-way reports with VK4YB.  Merv indicates that more extreme tidal activity is expected for the next two days.  He also has some antenna work in the planning phases as he begins to source local materials for the project.  We sometimes take for granted just how difficult something as simple as an antenna project can be on a remote island location.  Big box home improvement stores have spoiled me.

WH2XCR 022416

WH2XCR 24-hour WSPR activity

 

WH2XCR JH3XCU 022416

WH2XCR, as reported by JH3XCU

 

WH2XCR VK2XGJ 022416

WH2XCR, as reported by VK2XGJ

 

WH2XCR VK4YB 022416

WH2XCR, as reported by VK4YB

 

VK4YB WH2XCR 022416

VK4YB, as reported by WH2XCR

 

WH2XCR KL7L 022416

WH2XCR, as reported by KL7L

 

Phil, VK3ELV, received reports from JH1INM, JH3XCU, and WH2XCR:

VK3ELV JH1INM 022416

VK3ELV, as reported by JH1INM

 

VK3ELV JH3XCU 022416

VK3ELV, as reported by JH3XCU

 

VK3ELV WH2XCR 022416

VK3ELV, as reported by WH2XCR

 

Additional anecdotes, comments, reports and statistics:

Jim, W5EST, provided an analysis of recent JT9 data from stations in the Pacific Northwest:

“Today’s report follows up John XIQ blogging the 630m decodes of John VE7BDQ, Toby VE7CNF & Joe WI2XBQ into Neil WG2XSV yesterday Feb. 23. As you know, the Feb. 12 blog reported on the reverse JT9 path WG2XSV-ve7cnf. My Feb. 12 scatterplot illustrated the roller-coaster WG2XSV-ve7cnf JT9 SNRs (9hr, 265 points) over a 399km short northbound sky-wave path featuring SIQ*=7dB.

For Feb. 23, the JT9 SNR sequence gives us a peek at the southbound path on a clear night from B.C. to southern Washington state.  The SIQ in reverse direction from both VE7’s was 6 and 8 dB—within one dB of the path in the reverse direction.  The scatterplot for VE7BDQ Feb. 23 is omitted since it is a featureless band -5 to -20dB due to few number of 6 points per hour spread over ~6 hours.

630m single-hop Feb. 23 was behaving normally and well enough for JT9 reception over the ~6 hours. Probably some ground wave insignificantly mixed with the single-hop sky wave on the VE7-xsv paths too.

I say “insignificantly mixed” because I speculate that mostly only shorter paths 200-300km are the ones that get 630m 24-hour ground wave and 630m nighttime sky wave similar enough in strength to interfere significantly.

If much closer, then ground wave predominates.  If much farther, then sky wave predominates. The short path distance range featuring ground/sky wave interference will shorten as sky wave returns strengthen, but will lengthen as sky wave returns weaken over a night.  Maybe you know better. Please let us know and give some data from your experience if possible. See graph in Feb. 6 blog for combining dB.

SNR distributions: VE7BDQ-xsv has a relatively uniform SNR distribution across a 16 dB range from -5 to -21dB. VE7CNF-xsv has a SNR distribution ranging 17dB over -1 to -18dB that more nearly approaches the expected bell-shape probably due to higher number of SNRs overcoming the effects of statistical fluctuation.

W5est 022416

 

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