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Re: VLF: Strong drifting carrier on VLF!

from [Stefan Schäfer] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: Strong drifting carrier on VLF!
From: Stefan Schäfer <[email protected]>
Date: Tue, 29 Jun 2010 13:21:42 +0200
In-reply-to: <[email protected]>
References: <6D39CC1F4253463CB8570333737E59AA@PCCasa><38A51B74B884D74083D7950AD0DD85E82A1C1D@File-Server-HST.hst.e-technik.tu-darmstadt.de><B7FBFD72427D4802BC38C7310FB750A8@PCCasa><38A51B74B884D74083D7950AD0DD85E82A1C2E@File-Server-HST.hst.e-technik.tu-darmstadt.de><[email protected]><38A51B74B884D74083D7950AD0DD85E82A1C30@File-Server-HST.hst.e-technik.tu-darmstadt.de><48711884B26B40129A1D43EBB493A6BF@PCCasa><38A51B74B884D74083D7950AD0DD85E82A1C69@File-Server-HST.hst.e-technik.tu-darmstadt.de><001401cb1645$ce9e81c0$4001a8c0@lark> <[email protected]> <38A51B74B884D74083D7950AD0DD85E82A1C6C@File-Server-HST.hst.e-technik.tu-darmstadt.de> <[email protected]> <[email protected]>
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Markus,

Are you sure it is a sample rate alias? May be possible but where do you know that they don't come back to real 18 kHz?  The 8,97 kHz band filter becomes more and more efficient on higher frequencies + the soundcards low pass filter...

73, Stefan


Am 29.06.2010 13:10, schrieb Markus Vester:
Yes, and it's strong enough on the DK7FC grabber to see a samplerate alias, stepping down all the way to 18 kHz.

Yesterday Klaus DJ6LB near Nuernberg improvised a DF loop, and got approximately 70° / 250° azimuth. So Russian origin would be a possibility. Any other measurements available?

Kind regards,
Markus (DF6NM)
 
-----Ursprüngliche Mitteilung-----
Von: pws <[email protected]>
An: [email protected]
Verschickt: Di., 29. Jun. 2010, 9:44
Thema: Re: VLF: Strong drifting carrier on VLF!

Hi,

The "staircase" continues today (2010-06-29) starting ~0630 utc at 23kHz, reaching 30kHz around 0730utc.

Peter
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