NASA NTRS · 19690000373
Improved VHF direction finding system
Abstract
Direction finding device operating at very high frequencies requires a loop antenna, mechanical rotation, and large structures. The system is applicable to an unmanned configuration. Direction information is extracted in the form of a direction cosine analog.
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Graf, E. R., Neff, H.. 1969-09-01. Improved VHF direction finding system. https://ntrs.nasa.gov/citations/19690000373
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