Noise Filtering For Reception of Very Low Frequency Radio
Abstract
Unwanted emissions and signal noise are major problem for VLF radio receivers. These can occur from man made sources such as power line hum, which can be prevalent for many harmonics after the fundamental 50 or 60 Hz AC source or from VLF radio transmissions such as LORAN, used for navigation and communications. Natural emissions can also be detrimental to the quality of recordings as some of the more interesting natural emissions such as whistlers or auroral chorus may be drowned out by the more common sferic emissions. VLF receiver circuitry must selectively filter out unwanted emissions and amplify the filtered signal to a record-able level without degradation of quality.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFMAE13A0335M
- Keywords:
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- 7949 SPACE WEATHER Ionospheric storms