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| datatrak:intro [2022/04/26 15:29] – philpem | datatrak:intro [2023/01/03 22:55] (current) – [Three-step positioning process] philpem |
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| ^ Phase ^ Frequency ^ Wavelength (lane width) ^ Resolution ^ | ^ Phase ^ Frequency ^ Wavelength (lane width) ^ Resolution ^ |
| | "super-coarse" | $\Delta F = 80 Hz$ | $\lambda \approx 3747 km (2329 miles)$ | $\frac{3747 km}{1000} \approx 3.7 km$ | | | "super-coarse" | $\Delta F = 80 \mathrm{Hz}$ | $\lambda \approx 3747 \mathrm{km} (2329 \mathrm{miles})$ | $\frac{3747 \mathrm{km}}{1000} \approx 3.7 \mathrm{km}$ | |
| | "coarse" | $\Delta F \approx 13 kHz$ | $\lambda \approx 23 km (14.3 miles)$ | $\frac{23 km}{1000} \approx 23 metres$ | | | "coarse" | $\Delta F \approx 13 \mathrm{kHz}$ | $\lambda \approx 23 \mathrm{km} (14.3 miles)$ | $\frac{23 \mathrm{km}}{1000} \approx 23 \mathrm{metres}$ | |
| | "fine" | $F \approx 130kHz$ | $\lambda \approx 2.3 km (1.43 miles)$ | $\frac{2.3 km}{1000} \approx 2.3 metres$ | | | "fine" | $F \approx 130 \mathrm{kHz}$ | $\lambda \approx 2.3 \mathrm{km} (1.43 miles)$ | $\frac{2.3 \mathrm{km}}{1000} \approx 2.3 \mathrm{metres}$ | |
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| In practice, the total accuracy is limited by variations in propagation conditions and measurement error. | In practice, the total accuracy is limited by variations in propagation conditions and measurement error. |