RF Circuits

10 metre WSPR 5th August 2011

I noticed the 10metre beacons were a bit active this morning, first I heard F5ZWE/B (10:13utc) RST 549 , followed by I0KNQ/B (10:18utc) RST 428.

Then I had to go QRT for a few hours

Later in the afternoon I set up WSPR on 10 metres to see if there was anybody about, given the beacon reception this morning.




As luck would have it, on what seemed a completely quiet band ...... the following were put in the log..

Timestamp	Call	MHz	SNR	Drift	Grid	Pwr	Reporter	RGrid	km	az
2011-08-05 15:44	MW0MJB	28.126109	-22	1	IO71lu	1	CN8LI	IM63nx	1993	185
2011-08-05 17:32	MW0MJB	28.126131	-26	0	IO71lu	1	CT1JTQ	IM57ma	1678	192
2011-08-05 16:26	MW0MJB	28.126094	-24	0	IO71lu	1	OK/AD6XP	JN89ff	1541	92
2011-08-05 18:28	MW0MJB	28.126082	-27	0	IO71lu	1	DL2ZQ	JO42vj	1013	81
2011-08-05 18:16	MW0MJB	28.126103	-13	-1	IO71lu	1	DK6UG	JN49cm	967	100
2011-08-05 18:16	MW0MJB	28.126079	-26	0	IO71lu	1	DL8BBY	JO43jb	945	76
2011-08-05 20:28	MW0MJB	28.126090	-14	0	IO71lu	1	G3THQ	IO91un	329	94

F5ZWE/B Beacon 28.242,7 MHz Loc : JN02tw FOIX alt 1205 m asl France

What are these lines I wonder.....?
I noticed on the WSPR graph this curved trace....is this caused by aeroplane scatter?

I don't know enough about what the WSPR graph represents, perhaps someone can explain what these lines are exactly...




There is a transatlantic flight path just to the North of my QTH ...I wonder if that has something to do with the  unusual WSPR trace...