A Digital Polarimeter for Measuring the Faraday Rotation Using a Beacon from a Geostationary Satellite.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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The digital polarimeter described was designed to measure continuously and record automatically the rotation angle of a linearly polarized wave. The polarization rotation is caused by a phenomena known as the Faraday effect. The digital polarimeter uses a dual phase-lock-loop receiver which directly measures the phase difference between the right- and left-hand circular components of the received linearly polarized signal. This approach provides the optimum in sensitivity and dynamic range. A digital multicycle phase meter measures the phase difference between amplified and down converted circular components. The measured phase is then formatted and recorded on a digital magnetic tape recorder for automatic computer analysis.
- Test Facilities, Equipment and Methods
- Radiofrequency Wave Propagation