| 摘要 |
The moving map display screen makes it possible to display the relief of the area overflown by an aircraft as a function of the altitude of the latter. A moving-spot video reader analyses by radial scanning the relief of the area to be overflown and recorded on a film. In a processing circuit, the instantaneous altitude of the analyzed point is supplied in digital form to three comparators, where it is compared to three different values as a function of the aircraft altimeter. The result of this comparison makes it possible to classify this altitude in a range relative to the instantaneous altitude of the aircraft. A transcoder allocates to each range a particular digital value corresponding to a given shade. A display means reproduces the relief of the analyzed area with the aid of several conventional shades.
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