Strange early morning spots

7 posts / 0 new
Last post
M0NRD
Offline
Last seen: 4 months 3 weeks ago
Joined: 2012/11/22 - 13:20
Strange early morning spots
AttachmentSize
Image icon oddsignal.jpg59.28 KB

I left my receiving station running overnight on 40m and noticed in the log multiple occasions when spots from the same station appeared on different frequencies at the same time. For example

121204 0502 12 -23 -1.0 7.040087 HB9DUK JN46 27 0 2 0
121204 0502 13 -14 -1.0 7.040100 HB9DUK JN46 27 0 28 0
121204 0502 11 -22 -0.9 7.040114 HB9DUK JN46 27 0 3 0

121204 0516 18 -14 -2.2 7.040007 HB9TMW JN36 37 -1 3 0
121204 0516 23 -9 -2.2 7.040021 HB9TMW JN36 37 0 95 0
121204 0516 19 -12 -2.2 7.040034 HB9TMW JN36 37 0 2 0

121204 0622 13 -22 1.2 7.040030 S59I JN76 37 0 1 0
121204 0622 15 -11 1.2 7.040044 S59I JN76 37 0 1 0
121204 0622 13 -21 1.2 7.040057 S59I JN76 37 0 1 0

Interestingly this isn't the first time I have observed it, I saw it on 80m the other day when again I left my system running overnight

121130 0640 8 -28 1.2 3.594079 DK4XI JN39 37 0 1 0
121130 0640 15 -19 1.3 3.594092 DK4XI JN39 37 0 1 0
121130 0640 20 -8 1.2 3.594105 DK4XI JN39 37 0 1 0
121130 0640 14 -18 1.3 3.594119 DK4XI JN39 37 0 1 0
121130 0640 8 -25 1.3 3.594132 DK4XI JN39 37 0 1 0

I took a screen shot of that one, and it looked like the signal was 'ringing' about a central frequency. I assumed at the time that it was something generated by my receiver, which is a FUNCube Dongle Pro Plus using SDR#. Now it has happened again but this time on a different band I am not so sure especially as the receiver has been running for many hours during the day with no issues.

These multiple spots have happened in the early morning, just as the sun is beginning to rise.

Any ideas what is the problem?

Andrew