POLARIZATION VARIATION OF SATELLITE-EMITTED RADIO SIGNALS.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
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A new system for the measurement of the actual momentary values of the Faraday rotation polarization vectors of satellite emitted frequencies has been developed. Measurements of the relative polarization angles of the S-66 Satellite-emitted 40 to 41 Mcs signals, from which the absolute rotation angle is obtained, have been made at one-second intervals. A comparison of momentary polarization angles at 40 and 41 Mcs made during the center part of overhead satellite passages shows deviations from the expected inverse frequency squared relation. It has been found that correct raw data can only be obtained from the difference of simultaneous polarization measurements during a short interval when this difference is near pi radians. Correction for antenna geometry error and for non-linear system errors permits electron content evaluation with 1 precision over a latitudinal range of about ten degrees. Author
- Atmospheric Physics
- Radiofrequency Wave Propagation