High Frequency Propagation Anomalies.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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A search was made for propagation anomalies using a large quantity of high frequency data produced as a byproduct of BRIGHAM, a Department of Defense project. The BRIGHAM data is based on 800 KHz wide samples of the HF spectrum at a 25 cycle rate, using a 2.8 KHz resolution for a duration of approximately 2.5 minutes. This method of data collection is unique and it was hoped that propagation anomalies, including wide band anomalies, might be detected. Anomalies are believed to occur in the propagation of radio signals and they are usually other than known, routine effects but may include known effects which cannot adequately be explained. The scope of the examination was limited to the visual analysis of computer processed data presented on an interactive graphics unit. Author
- Radiofrequency Wave Propagation