| 1. | Should the radio altimeter fail, a backup barometric detonator was used.
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| 2. | FM-CW radars are very widely used as radio altimeters in aircraft.
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| 3. | The plane's radio altimeter then sounded : " 400 ft ".
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| 4. | Six seconds before impact, the radio altimeter warning was activated.
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| 5. | The aircraft was however also fitted with a radio altimeter.
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| 6. | A 1-meter diameter parabolic dish antenna for the radio altimeter was also located at this end.
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| 7. | XIV . He suggested that both could be improved through the addition of a radio altimeter.
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| 8. | The electrical axis of the radio altimeter antenna was lined up with the axis of the cylinder.
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| 9. | In 1924, he invented the radio altimeter.
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| 10. | The instrument landing system comprised many functions, such as an autothrottle, a head-up display, and radio altimeter.
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