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The project: how to “show” the falling stars to the blind

It’s more than three years that I monitor VHF for meteor scatter signals thanks to the French GRAVES radar near Dijon. This is a bistatic radar that transmits a CW signal at 143.050. With a simple radio system is possible to receive the radar signal reflected by the meteors ionized plasma that these objects create […]

Recycling an old Smartphone to easily remote VLF probes

All this started when I decided to move my home made geophone from my lab room to my cellar at about 3 meters under the ground. It was a better position for this device because of absence of electro-magnetic noise. Only a simple 220VAC socket and an incandescent lamp are located in the cellar, no […]