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What are these?

Posted: Mon Apr 11, 2016 3:34 pm
by AliD
1. There seems to be some sort of pattern to this one. First, it is silent. Then a tiny signal can be seen near the right edge. Then around the middle 4 dots can be seen in the spectogram. Then, after some silence, there are some more beeps and then that thing from the image. Then silence and then it happens all over again.
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2. I keep finding things like these in many frequencies. What are they?
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3.Same comment as number 2
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4.
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5.
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6.
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My country is Portugal.

Re: What are these?

Posted: Mon Apr 11, 2016 8:36 pm
by Kenn
#1 looks like it might be remote temperature, humidity, weather sensors. Especially if there's ~1 minute between short burts of data.

Not sure about the other, it could be anything ... interference from a computer, wifi router, nearby transmitters such as pagers or cell phone, etc.


--Kenn