NJDTechnologies

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Current Operating Frequency and Mode

OFF AIR for storms, probably for much of the week if the forecast holds

More noise and deep QSB impact North American operating during this session; Robust trans-Atlantic openings continue; Average to slightly above average conditions on trans-Pacific paths; W5EST presents: ”LA2XPA Sunrise”

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for January 23, 2017 can be viewed here.

The UTC amateur registration database is here.

Working grids for the first time in 2018? Be sure to upload your logs to LoTW so the 630m operators participating in the 2018 Grid Chase Event can receive credit. Details on LoTW can be viewed here.

The current band plan used on 630 meters can be viewed HERE

WAS operator list detailing stations that are two-way QSO-capable can be viewed here.

Spot stations calling CQ on any mode here on DXSummit and help them find a Q

 

It was another noisy night in North America as lightning-rich storms continue to march across the  continent.  In spite of otherwise clear conditions in the West, a number of stations reported high noise there as well.  Europe was mostly clear ahead of the next storms system which had not quite moved on shore by this morning.  Japan was once again inundated with storms and the system impacting the southeastern portion of Australia intensified.  A number of eastern population centers remain lightning-free, however.  The north island of New Zealand experienced periodic storms during the session.

11-hour worldwide lightning summary

 

Geomagnetic conditions continue at elevated-quiet levels.  The Bz is close to unity this morning and solar wind velocities are averaging near 440 km/s.  DST values are more variable than in recent sessions.

 

 

 

Strong QSB and high noise impacted operating during the session resulting in lower overall activity but trans-Atlantic WSPR openings were reported by a significant number of stations.  Trans-Pacific openings were consistent with recent sessions with above average openings between Alaska and Japan and Alaska and Australia.

Reverse beacon network reports follow:

 

Jim, W5EST, submitted the following screen capture of his WSJTx console showing JT9 activity observed at his station in Little Rock, Arkansas:

courtesy W5EST

 

The following stations provided reports of their two-way QSO’s and/or any additional activity that might have occurred during this session (this is not necessarily a complete list – only what was reported!):

John, WA3ETD, reported JT9 QSO’s with WB4JWM, K9KFR, KC4SIT, WA1OJN and VE3CIQ.  Due to ice John was off air following this evening activity.

Tom, WB4JWM, completed JT9 QSO’s with WA3ETD and ZF1EJ.

Ernie, KC4SIT, completed JT9 QSO’s with  N1BUG and WA3ETD.

Al, K2BLA, indicated that he “Was on 630 last night for a short while. Lightning crashes were absolutely horrific. Worked KC9SIT and K3MF on JT9. On WSPR made a few transmissions. Heard by 22 and heard 13. WX forecast called for slight chance of lightning overnight but shut down early and disconnected antennas. Front is coming through now, (1200 Z)”

Ken, K5DNL, operated WSPR overnight, reporting twenty stations and he received reports from 82 unique stations including KL7L, EA8BFK, F59706, G0LUJ, ZF1EJ, ZF1RC, YV7MAE and ten Canadian stations.  Check Ken’s website, K5DNL.COM, for a list of products that he has for sale to help you get on the air.

Robert, KR7O, reported that “Propagation improved but masked by high noise and lightning crashes.  Low activity on JT9 with only a single spot of K2BLA and a few from KL7L plus a couple of regional stations last night.  On WSPR, copied TC stations N4WLO (2/-27), KC4SIT (30/-14), W3LPL (4/-26), W4BCX (17/-23), N1BUG (-29) and ZF1EJ.

ZF1EJ 5 spots, -24

KL7L 71 spots, -6

VK4YB 7 spots, -24

I spent a lot of time listening at KB5NJD during this session as I continue to evaluate the Softrock ensemble II LF that was previously located at my remote receive location.  It seems to work OK and gives me another option to watch the entire band while I may be operating on another band at the main operating position.  Its a bit more susceptible to interference than the transverter and FT1000 combination, however.  I also listened a bit for KW7T in Colorado as he continues to evaluate his system.  I made a few calls and received a reverse beacon report from VE6WZ but that was about it.  Noise remains high to the East but was much more manageable to the West.  This morning I made a few late calls on 474.5 kHz CW but received no reports nor did I complete any QSO’s.  I wasn’t hearing much this morning either and something seems to be going on with propagation.

Trans-Atlantic WSPR summary follows:

ZF1EJ -> LA2XPA

WA1OJN -> LA3EQ

DC0DX ->AA1A

DF2JP -> AA1A

DL6TY -> VE1YY

EA4GHB -> AA1A

F1AFJ -> VE1YY

F4DTL -> AA1A

PA0A -> N1BUG, AA1A

DH5RAE -> AA1A, VE1YY, WA9WTK

K5DNL -> EA8BFK, F59706, G0LUJ, G0LUJ/1, G0LUJ/3

W3LPL -> G0LUJ, G0LUJ/1, G0LUJ/3, GM3YXM, LA2XPA, LA3EQ

F5WK -> AA1A, AB1KW, N1BUG, N3FL, VE1YY, W3LPL, WA9WTK

W4BCX -> EA8BFK, G0LUJ, G0LUJ/1, G0LUJ/3, GM3YXM, LA2XPA, LA3EQ

EA5DOM -> VE1YY, N1BUG, AA1A, KK1W, W3LPL, N3FL, W4KZK, K4LY/P

G0MRF -> AA1A, AB1KW, N1BUG, N2HQI, N3FL, VE1YY, VE3CIQ, W3LPL, WA1OJN, WA3TTS

AA1A -> DH5RAE, DL4RAJ, DL4RAJ/2, EA1BNF, F1AFJ, F59706, F5WK, G0LUJ, G0LUJ/1, G0LUJ/3, GM3YXM, LA2XPA, LA3EQ, M0NKA, OK1RXX, PA0O, PA0RDT, PA3ABK/2, PA7EY

N1BUG -> DF0KL, DH5RAE, DL1KAI, DL4RAJ, DL4RAJ/2, EA1BNF, EA2HB, EA8BFK, F1AFJ, F59706, F59706/1, F5WK, F6GEX, G0LUJ, G0LUJ/1, G0LUJ/3, G0MRF/P, G3WCB, G4ZFQ, GM3YXM, LA2XPA, LA3EQ, M0NKAON5TA, OR7T, PA0EHG, PA0O, PA0RDT, PA3ABK/2, PA7EY

Trans-Pacific WSPR summary follows:

KL7L -> JA1PKG, JA3TVF, JA8SCD5, JE1JDL, JH3XCU, TNUKJPM, VK4YB

VK4YB -> JA1PKG, JA3TVF, JH3XCU, K1YQP, K6SRO, K8MI, KK6EEW, KL7L, KPH, KR6LA, KR7O, NU6O, TNUKJPM, VE6JY, VE6XH, VE7CNF, W7IUV/W

 

Hideo, JH3XCU, submitted this link detailing DX -> JA WSPR decode totals and DX -> JA WSPR S/N peaks for the session, as reported on the Japanese language 472 kHz website.

 

Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR summary

 

South American 24-hour WSPR summary

 

European 24-hour WSPR summary

 

Japanese 24-hour WSPR summary

 

Oceania 24-hour WSPR summary

 

Eden, ZF1EJ, completed a JT9 QSO with WB4JWM and attempted a QSO with N1BUG that was scuttled by QSB and noise at N1BUG.  Eden indicated that he was hearing N1BUG on every cycle.  Eden reported fifteen WSPR stations and he received reports from forty unique stations including LA2XPA.

ZF1EJ session WSPR summary

 

Roger, ZF1RC, joined us again after a very long hiatus, reporting five WSPR stations.

ZF1RC session WSPR summary

 

Martin, YV7MAE, reported three WSPR stations.

YV7MAE session WSPR summary

 

Laurence, KL7L, operated a bit of JT9 during the evening and this morning.  He received reports of his JT9 from KR7O this morning that ended before sunrise in southern California:

2018-01-23 13:06 KL7L 0.475766 -17 0 BP51ip

Laurence reported seven WSPR stations and he received reports from 33 unique stations including JA1PKG, JA3TVF, JA8SCD5, JE1JDL, JH3XCU and TNUKJPM . He shared two-way reports with K5DNL, KR6LA, NU6O, VK4YB, W0YSE and W7IUV.

KL7L session WSPR summary

 

Merv, K9FD (/KH6), was off air again during this session.

Jim, W5EST, presents, LA2XPA SUNRISE“:

“Regardless of latitude, we can calculate kilometers of penetration distance of solar radiation from the terminator into the pre-sunrise regime.  For hypothetically scattered solar ionizing radiation the penetration calculates to about 1230 km. For hypothetical visible light penetration, I estimate 870 km. And for direct solar ionizing radiation penetration, use 615 km. (See Endnote*).

The rays of pre-SR sun are nearly aligned with the 630m RF path into LA2 around now.  That way, the pre-SR time when those rays first affect the east-most D-region crossing (nearest to LA2) of that RF path gets closest to sunrise time at LA2XPA in the late fall and now winter.  Meanwhile, the next-to-nearest D-region RF crossing of the eastmost hop into LA2 remains in darkness. We have seen that N. America stations have been reaching LA2XPA in the night and as late as sunrise time or even a little afterwards there.  Solar radiation reaches deep into pre-SR E-region and may curve the E-region somewhat, providing some 630m signal enhancement around the time of LA2 sunrise.

Let’s presume multihop-E is indeed the propagation mode by which 630m N. America WSPR stations reach LA2XPA in Norway.  Today’s TABLE shows geographic distance to the east-most RF D-region crossing on the last hop. It’s in a range roughly 600km-900km from the terminator.

I’ll omit tabulations of 630m RF arrival headings. They may be subject to lateral skew propagation anyhow.  Inbound 630m signals arrive nearly West 280° into Norway from USA Southeast stations. From Alaska and Hawaii, the signals arrive in Norway north of NW at 315° or so.

Sunrise heading at LA2XPA is at SE heading 135° or even further toward SSE for a month on either side of winter solstice—Nov. 18 to Jan. 23.  At winter solstice itself, sunrise reaches 148° heading at LA2XPA .

The pre-sunrise (pre-SR) regime lasts 2-3 hours at the 60+ degrees high latitude of the incoming 630m RF.  Hypothetical D-region ionizing scatter advancement time there is graphed at http://njdtechnologies.net/011118/  (scroll ~20%).   The sun’s wintertime ascent rate in elevation is not only much slower at LA2 than at the mid-latitudes many 630m TX stations occupy, but also the sun’s pre-SR azimuth heading swings laterally southward for a considerable time before and after LA2 sunrise SR.

Consider some symmetry of W/VE-LA2 path and the pre-SR ZL2-KL7 nautical twilight opening illustrated at: http://njdtechnologies.net/072217/ (scroll 10%, 2nd from last visual).  In both cases the signal crosses DX distances in the dark and arrives not far from perpendicular into the long sub-Arctic twilight ahead of the terminator at the eastward station.  It’s remarkable that hams have demonstrated 630m WSPR completions at the low power levels in use on these paths.

TU & GL on 630m DX WSPR!”

*ENDNOTE:  I assume ozone layer altitude hOZ =30 km and D-region altitude hD = 60 km. See Earth illustration at http://njdtechnologies.net/011018/  (Scroll down 1/5)
Solar ionizing radiation scattering distance is estimated from terminator D-region to pre-SR D-region projected down to geographic surface distance beneath:
dTermDSR = 2RE arccos[(RE+hOZ)/(RE+hD)] = 1230 km with Earth radius RE=6371 km.
For visible light penetration, use:
 dVisD = RE arccos[RE/(RE+hD)] = 870 km.
For direct solar ionizing radiation penetration, figure:
dOzDSR = RE arccos[(RE+hOZ)/(RE+hD)] =  615 km.

 


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