HIGH RESOLUTION RADIO FREQUENCY MEASUREMENTS OF FARADAY ROTATION AND DIFFERENTIAL ABSORPTION WITH ROCKET PROBES,
ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB
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A highly essential system for lower ionosphere radio propagation measurements, using probe rockets, developed by the Coordinated Science Laboratory, is described in detail. Unique features include 1 feedback around a closed loop consisting of the rocket and ground stations employed in a null-seeking technique, which increased absorption measurement accuracy and 2 artificial rotation of the ground based antenna which extends the range over which Faraday rotation can be resolved from layer reflection phenomena. The rocket borne and ground station equipment has been shown to work reliably during a series of 14 rocket measurements made from both land-based facilities and the NASA seagoing mobile launch platform during the International Quiet Sun Years. Complete engineering information is given in the hope that other investigators may easily duplicate the measurements. Data processing techniques for smoothing and improving the accuracy as well as some typical data are described.
- Radiofrequency Wave Propagation