Detecting Meteors by Radio in Penrith, Cumbria

Penrith Meteor Station Dual Band Colinear Aerial Yaesu FT-817ND

The G-R-A-V-E-S installation is almost exactly 1000km or approximately 620 miles from my location and the BRAMS low power CW meteor radar in Belgium is around 700km away from me.

The images below are "grabs" from the widely known and respected FREE program Spectrum Laboratory by Wolfgang Buscher, DL4YHF. As many as eight instances of the program running on the same computer are used, though the configuration of each instance is different, of course, in order to produce the various different grabs.

Audio is fed from my radio, a Yaesu FT-817ND to my the soundcard of the PC running the programs - virtually any sound card can be used as the bandwidth of the source signal is only a few hundred hertz, and the sampling rate is a modest 11.025kHz.

SpectrumLab also uploads the grabbed images to the web server regularly, as dictated by the characteristics of the grab.

Meteor Grabber - 2-channel, 2D Display
Meteor Grabber - 2-channel Amplitude Plot

Meteor Grabber - 3D Display

50MHz Meteor Grabber - 3D Display

Meteor Grabber - 60-min Display
Meteor Grabber - 2-channel Hourly Amplitude Plot
GRAVES Meteor Grabber - 5-minute meteor count
BRAMS Meteor Grabber - 5-minute meteor count

HROFFT Display

HROFFT Display

The above screen grab is from the HROFFT program, which is another application which converts the audio signal from my radio receiver(s) to a visual display known as a waterfall. It also has a built-in counting function which tries to record the number of received pings in each ten-minute period.

I used to feed this count information to another program which in turn produced a "colourgramme" display, and uploaded the data to the RMOB web site. However as I am currently unable to run the station for 24 hours per day, I have stopped doing this, as part-time data would be of little use to anyone.

More information about the Perseid meteor shower in 2009 and related subjects HERE

More information about Radio Meteors, and the GRAVES radar installation HERE

More 3D displays from the SPAM UK meteor detection network HERE

Technical information about Radio Meteors in general HERE

Page modified :- April 20th 2018

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