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Airborne Doppler navigation aids
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According to BAE Systems, Airborne Doppler navigation aids on a center frequency of 8800 MHz. Doppler Navigation is a self-contained aircraft navigation system developed in the 1940s that uses Doppler effect radar interaction with the earth in dead-reckoning calculations to navigate.
Today it is used mostly in rotary aircraft – helicopters. It was also used in commercial fixed-wing aircraft initially for several years, including secondary navigation support in some military planes, before being replaced by global positioning system (GPS) navigation. Doppler navigation systems transmit four frequency-modulated continuous-wave radar beams directed downward at about 45 degrees, fore and aft, at 8,800 MHz.
See Footnote 5.470.
This information is based on publications as old as 1975.
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Frequencies |
| Frequency | Bandwidth | Use | Service | Table |
| 8800 MHz | - | Airborne Doppler navigation aids | Aeronautical Radionavigation | - |
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