On Mon, 20 Dec 2010, Jami Casamento wrote:
Gilbert,
I checked with the NCF and all AWIPS sites are running an EbNo of 6.4 or
better.
AWIPS SBN operations are normal at this time.
Are you having issues receiving the NOAAPort feed?
Thanks,
-Jami
Hello Jami,
Thanks for writing back. As you can see by my real-time
output:
http://noaaport.admin.niu.edu:8025
In short, I'm receiving all the packets, however...there has been a
significant drop in Carrier to Noise (or if you prefer, signal to noise).
With SES-1 power levels being 4 dB higher than average, I should see very
high carrier to noise and very high EbNo. Late last week, Jose Nieves
briefly re-attached his S75 in Puerto Rico with a 3.0 meter dish, and was
getting an EbNo around 13 (the new Novra S200s use C/N and true signal
receive levels rather than EbNo). That's what I would expect, given the
power being given to us now.
It almost looks like something is interfering a bit with the *uplink* to
your master ground station. Power levels on the satellite have not
changed, but the signal quality has gone down, that is for sure.
I'm afraid that when we drop 4 dB tonight, whatever noise I'm seeing
could push us "over the edge" and have us start to lose packets.
Again, the web page above shows the signal quality drop very
clearly when you switched from the backup to the primary MGS's
this morning.
*******************************************************************************
Gilbert Sebenste ********
(My opinions only!) ******
Staff Meteorologist, Northern Illinois University ****
E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx ***
web: http://weather.admin.niu.edu **
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