A FLEXIBLE INCREMENTAL PHASE SERVO WITH DIGITAL OUTPUTS FOR INDICATING PHASE AND DOPPLER FREQUENCY OF IONOSPHERICALLY PROPAGATED RADIO SIGNALS
SPACE DISTURBANCES LAB BOULDER CO
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A flexible solid-state phase-tracking system designed for use on ionospherically propagated radio signals is described. The output is basically digital in form and suitable for use with automatic data processing systems. The unit provides an output equal to the rate of change of phase or Doppler frequency of the incoming signal and is sufficiently flexible to be used on VLF through HF signals. The design is described and specifications of the prototype unit included. Some examples of results obtained using the equipment are given.
- Active and Passive Radar Detection and Equipment
- Radiofrequency Wave Propagation