Natural Radio Emissions at Very Low Frequency

Joachim Köppen Strasbourg 2011 - Kiel 2024

These notes are a collection of my experiences of listening to radio emissions in the range of audible frequencies (below 20 kHz).

• NASA INSPIRE's VLF3 Receiver
• The Blackbox Receiver
• The Beercan Receiver
• SMD Receiver

• Recording the Data
• The analysis of the recorded sound files is done with the Spectrogram software written by Richard Horne, available from Visualizationsoftware LLC and other sites. I use both versions 5.0.6 and 16.0
• Noise Meter

• Spherics and Tweeks
• Whistlers
• Echo Trains
• Long and Pure Tone Whistlers
• Winter and Summer
• 2017: All Types Within a Few Hours
• 2024: More Experiments
• The Sounds of St.Michel: from a workshop in the Provence in autumn 2009.
• An Evening on the Beach
• A Long Day Full of Whistlers

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last update: May 2024 J.Köppen