Accession Number:

ADA012168

Title:

A Digital Polarimeter for Measuring the Faraday Rotation Using a Beacon from a Geostationary Satellite.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s):

Report Date:

1975-06-01

Pagination or Media Count:

25.0

Abstract:

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.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE