Return-Path: Received: (qmail 26284 invoked from network); 1 Oct 2001 11:01:15 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 1 Oct 2001 11:01:15 -0000 Received: (qmail 13285 invoked from network); 1 Oct 2001 10:59:06 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 1 Oct 2001 10:59:06 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15o0iU-0001cH-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 01 Oct 2001 11:54:30 +0100 Received: from carbon.btinternet.com ([194.73.73.92]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15o0iS-0001bo-00 for rsgb_lf_group@blacksheep.org; Mon, 01 Oct 2001 11:54:28 +0100 Received: from [213.122.92.7] (helo=default) by carbon.btinternet.com with smtp (Exim 3.22 #6) id 15o0eO-0003MX-00 for rsgb_lf_group@blacksheep.org; Mon, 01 Oct 2001 11:50:16 +0100 Message-ID: <000301c14a66$4ec2e680$075c7ad5@default> From: "Alan Melia" To: "LF-Group" Subject: LF: DX Cluster spots for Sept 29/30th at GB7DXM Date: Mon, 1 Oct 2001 00:38:36 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, there was quite a lot of activity this weekendand it seems there were some new stations to be 'winkled out'. I am particularly interested in the proagation conditions this weekend. Mal posted to say that it was good on Saturday. There was a small (M2.0) X ray flare at about 1100z which lasted for a few minutes, but I did not see an correlation in the strength enhancement of DCF39 on Brian's plot for Saturday morning. However there was possibly another effect active. We have noticed that after a geomagnetic storm, which injects ions into the ionosphere, it is often possible to hear CFH (when active) in daytime. John VE1ZJ has reported DCF39 being enhanced in daytime also during these events. This effect last for the majority of the daylight hours not just a short period as with an X-ray flare enhancement, where the signal profile closely follows the X-ray flux profile. The level of this daytime enhancement never reaches the normal night-time levels. However conversly the nightime signals are much reduced in strength from normal at this time. I had not seriously considered the possibility of shorter distance effects though I have discussed it with Steve GW4ALG. Brian's Saturday 29th morning plot for DCF39 shows a distictly higher level than normal (6 to 10 DB) with a strange sharp fade at one point ( there are normally no fades of this kind on the daytime plot). The night-time signal is about 10dB below average. It would seem that the ion injection during a magnetic storm can produce useful daytime signal enhacements at inter European distances due to daytime 'skywave' (say single hop). This occurs not less than three days and more usually 4 days after a storm (shown by a Kp index or 5 or above). The effect can continue for several days before it dies away, and may be bolstered by further storms. The length of time enhancement persists seems to be dependent upon the violence of the storm (enhancement will occur for many days after a Kp value of 8 or 9). Unfortunately for those of us in close proximity to stations like DCF39 we cannot use them as indicators. One needs to be at a distance where there is a substantial difference between daytime and night-time strengths of the chosen beacon station. This ensures that there is a substantial ionosperic wave component. In the case of DCF39 this probably means 1500kms or more (Brian is 1950 kms) My conclusion....maybe this was a good propagation day (or two)...maybe we should watch out for them in future. Unfortunaely the noise level was quite high this weekend and I heard Mal on Sunday struggling to pull through DJ1NL, I could see the trace and detect an audible signal but could not read it at all for weak background TV qrm signal almost on the frequency. It seems from the listing below, Mal didn't quite make it as it would seem to be DJ1RL he was working. I believe these are signals that may have been slightly enhanced. I also saw a DFCW signal from DF8ZR at 0800z on Sunday at 'O', and saw Markus on DFCW who may have been working Rich, but I saw no trace of Rich on FFTDSP4 and did not have time to start up the machine with Argo installed. Cluster spots follow.... 136.5 PA0BWL 30-Sep-2001 1413Z in QSO F6BWO 137.0 DL3FDO 30-Sep-2001 1340Z clg F6BWO 137.0 DL3FDO 30-Sep-2001 1341Z clg F6BWO 137.0 F6BWO 30-Sep-2001 1339Z 137.0 F6BWO 30-Sep-2001 1340Z 136.5 G3KEV 30-Sep-2001 1318Z DJ1RL calling him 136.5 G3KEV 30-Sep-2001 1319Z DJ1RL calling him 136.6 OK1FIG 30-Sep-2001 1053Z cq 136.6 OK1FIG 30-Sep-2001 1053Z cq 137.6 DF6NM 30-Sep-2001 1049Z clg OM2TW in DFCW 137.6 DF6NM 30-Sep-2001 1050Z clg OM2TW in DFCW 137.6 OM2TW 30-Sep-2001 1039Z cq qrss 137.580 kHz 136.8 DJ7RD 30-Sep-2001 0929Z 136.8 DL3FDO 30-Sep-2001 0916Z in qso OM5CW 136.7 OM5CW 30-Sep-2001 0900Z hr signal like a "M.nk." 136.7 OM2TW 30-Sep-2001 0854Z & om5cw;& Low Frq.meetinG 136.7 OZ1KMR 30-Sep-2001 0850Z in qso OM2TW 136.5 DK7SU 30-Sep-2001 0845Z cq 136.8 DK6NI 30-Sep-2001 0828Z clg OM2TW 137.7 DF8ZR 30-Sep-2001 0802Z CQ in DFCW 136.6 OK1FIG 30-Sep-2001 0727Z cq 136.6 DK7SU 30-Sep-2001 0723Z clg OK1FIG 137.6 OM5CW 30-Sep-2001 0722Z cq 136.7 YO2IS 30-Sep-2001 0703Z cq 136.5 OK1FIG 30-Sep-2001 0639Z 136.7 OM2TW 30-Sep-2001 0555Z 136.6 OM5CW 29-Sep-2001 1742Z cq 136.5 OM5CW 29-Sep-2001 1549Z CQ 137.6 OM2TW 29-Sep-2001 1453Z cq qrss 136.8 OM2TW 29-Sep-2001 1423Z cq 137.7 DF6NM 29-Sep-2001 1419Z cq qrss 136.5 DF0WD 29-Sep-2001 1309Z vy loud, jo42fd(->jo32qg 136.5 DJ7RD 29-Sep-2001 1223Z clg G3KEV 136.7 EI0CF 29-Sep-2001 1147Z sri vy vy weak 136.6 G3YXM 29-Sep-2001 1119Z solid copy 136.8 OM2TW 29-Sep-2001 1114Z now hr gd copy- sri Rich ha 136.4 DJ7RD 29-Sep-2001 1046Z in qso F6BWO 136.6 OM2TW 29-Sep-2001 1030Z loud cq cq 137.0 DK7SU 29-Sep-2001 1025Z a new one on LF 136.6 DL3FDO 29-Sep-2001 0815Z clg OK1FIG 136.6 OK1FIG 29-Sep-2001 0805Z 136.5 G3KEV 28-Sep-2001 1600Z in QSO with ei0cf 136.6 DL3FDO 27-Sep-2001 1641Z cq 136.6 DL3FDO 24-Sep-2001 1603Z weak but readably cq 136.6 WHO 23-Sep-2001 1326Z station CQing, but too weak 136.6 ON5ND 23-Sep-2001 1226Z loud, cq cq 136.7 G3KEV 23-Sep-2001 1159Z cq cq 136.8 OM2TW 23-Sep-2001 1137Z 136.6 DL3FDO 23-Sep-2001 1129Z clg OM2TW 136.4 EI0CF 23-Sep-2001 1059Z wkg G3AQC 136.6 LX1UN 22-Sep-2001 1931Z G3NYK de GB7MRS 30-Sep-2001 0927Z > There are some interesting new calls in there I see. Cheers all and Good DX de Alan G3NYK JO02PB Alan.Melia@btinternet.com