[evlatests] Interesting Nav satellite hit on 20110627

Dan Mertely dmertely at nrao.edu
Fri Jul 8 14:11:29 EDT 2011


Hi Rick.  I thought you'd find this event of interest.
@ 18:12 MDT on 20110627 I noticed a strong hit on one
of the new Galileo? navigation satellites.  Prior
minutes on the W8 monitor showed growing signals at
1563, 1270, and 1208 MHz.  At closest transit (I assume)
the signal was so strong @ 1563 MHz that strong signals
below 1563 MHz became mirror imaged above 1563 MHz.

(Note that the primary signal at 1563 MHz is not at the
standard GPS-L1 frequency of 1575.42 MHz.  GPS and Galileo
are experimenting with new signals within the radio-navigation
bands.  Included in these are new "Civilian L3" frequency
of 1208 MHz (also known as "E5"), and the "E6" signal "around"
1278 MHz.)

I've attached 3 plots showing the event:

1)  The W8 plot (@ "17:50"--time axis not too accurate).
2)  The hit prior to maximum intensity (@ 18:09 MDT).
3)  The hit at maximum intensity (@ 18:12 MDT).

Looks to me like we've definitely gone non-linear (in a
very interesting way).

-Mert
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