datatrak:intro

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datatrak:intro [2020/05/31 12:37] – [Datatrak LF signal format] philpemdatatrak:intro [2022/04/26 15:29] – philpem
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-====== Introduction to hyperbolic navigation and Datatrak ======+====== Introduction to Datatrak and hyperbolic navigation ======
  
 Hyperbolic navigation is a means of navigation which works by measuring the difference in arrival time between two signals. This may be done by measuring either time-of-arrival or phase-difference. Phase difference is usually preferred as it removes the need to precisely synchronise many transmitting stations. Hyperbolic navigation is a means of navigation which works by measuring the difference in arrival time between two signals. This may be done by measuring either time-of-arrival or phase-difference. Phase difference is usually preferred as it removes the need to precisely synchronise many transmitting stations.
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 |  "fine"  |  $F \approx 130kHz$  |  $\lambda \approx 2.3 km (1.43 miles)$  |  $\frac{2.3 km}{1000} \approx 2.3 metres$  | |  "fine"  |  $F \approx 130kHz$  |  $\lambda \approx 2.3 km (1.43 miles)$  |  $\frac{2.3 km}{1000} \approx 2.3 metres$  |
  
 +In practice, the total accuracy is limited by variations in propagation conditions and measurement error.
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  • Last modified: 2023/01/03 22:55
  • by philpem