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[IRCA] Michigan DUs this morning 9/6/2015

Interesting conditions noted in Michigan this morning centered around my
local sunrise at 1114 UTC.  At the upper end of the virtual "dial" I had DU
carriers at nearly every 9 kHz step, which is somewhat unusual here, at
least into the expanded band.  As with my reception of 1548 4QD back on
March 21st, these signals were only present when reversing my D-KAZ to the
North.  Zilch on the south-west phased BOGs when doing antenna
comparisons.  This gave me a good excuse to mess around with the Data File
Analyzer that's built into Simon's SDR-Console application.  Here's an
image showing all signals between 1503-1701 kHz spanned from 1055-1125
UTC.  The faint vertical lines represent the carriers noted here this
morning and they stand out fairly well between the strong domestics:

http://amdxer.com/spectrograms/1503-1701_kHz_06SE15_1110_UTC.png

Taking a deeper look at 1611 kHz reveals 7 different carriers:

http://amdxer.com/spectrograms/1611_kHz_06SE15_1110_UTC.png

Here's hoping I can dig up some audio on the SDR recording now..

73,
Tim Tromp
West Michigan
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