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Live audio spectrogram 49.970
MHz b/w ~120Hz as received in Tavistock, Devon, UK. Approx 1hr
per screen.
Below: plot of meteor rate and signal duration per hour.
One tick per hour and approx 5 days of history. The latest data is on the right >>
"Count +5" etc refers to the detection trigger levels of noise
+5dB, noise +10dB etc.
The duration shown is seconds per hour of signal received above
the trigger thresholds.
Please follow me on
Twitter and on the
Blog-o-sphere.
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How is this data
collected and how do I use it?
The data above is compiled from signals reflected by meteor
heads and trails. I am now receiving the DOURBES meteor beacon on 49.970 MHz. The
transmitter is located beyond the normal
direct reception range at a distance of 630km. The hills of Dartmoor
National Park shield me from the majority of any direct
reception, although I will be susceptible to extra signals and
interference during tropo propagation events. These events may
falsely increase the counts and initiate false meteor activity
alerts.
I use DL4YHFs Spectrum Lab software to process data from signals
received on a Yaesu FT-857 transceiver.
Spectrum Lab is programmed to send email alerts (using 3rd party
software).
How to receive meteor activity alerts?
"HIGH" and "VERY-HIGH" meteor activity alerts are issued via
email (subscribe to alerts here)
posted on my blog page
and sent via my Twitter feed
@g7izu
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My system is used in the following graphic (from www.qrz.com) to supply the
MS CNT (Meteor Scatter Count) and MS CND (Meteor Scatter Conditions) data.
[Page version:09/05/2013 22:30]
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