Advances in Low-Frequency Radio Navigation Methods

Advances in the analysis and design of low-frequency radio navigation systems are presented in four sections detailing system design, propagation, receivers and processors, and error analyses. Emphasis is on the short-baseline case where radial accuracies of 114 feet are possible for non-line-of-sight operation to ranges of 50 miles from transmitters. Possibel future applications for LF include an efficient solution for commercial ground transportation management, remotely piloted vehicle navigation, and cruise missile guidance. An error budget and experimental results are included plus a countermeasures analysis.