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AMATEUR RADIO PROPAGATION STUDIES
Weak signal project for propagation studies
Project Overview: Passive Ionospheric Sensing via WSPR
The Vision
This project leverages the global WSPR (Weak Signal Propagation Reporter) beacon network as a powerful, distributed diagnostic tool for ionospheric research. While WSPR was designed to test radio propagation, our research focuses on extracting "hidden" geophysical data from Signal-to-Noise Ratio (SNR) variations to better understand the dynamics of the upper atmosphere.
Our Research: Regional-Scale Ionospheric Coherence
My latest study, "Persistent nighttime SNR modulation in 80 m HF links," explores a fascinating phenomenon observed across Central Europe. By analyzing long-term data, we have identified a persistent nocturnal modulation in the 80-meter band that recurs night after night with remarkable similarity.
Key Findings:
Regional Coherence: These signal modulations are not local interference; they occur simultaneously across multiple transmitter-receiver pairs, indicating a large-scale ionospheric origin.
Stable Nocturnal Regimes: The data suggests the existence of stable, large-scale undulations in the F-region during the night.
80m as a Sensor: Our research highlights that the 80m band is uniquely sensitive to subtle changes in the nighttime ionospheric structure, making it an ideal "passive radar" for atmospheric gravity waves and TIDs (Travelling Ionospheric Disturbances).
Why it Matters
Traditionally, studying the ionosphere required expensive equipment like ionosondes or satellites. By using the WSPR network, we demonstrate that a coordinated community of radio amateurs can provide high-resolution, regional-scale data that complements professional scientific observations.
Weak signal beacon project
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